I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

On 28/05/10 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

How about a number of parallel units: axial fan, 4" ducting (rigid where
possible, flexi[1] at the end for any fiddly bits?

[1] Can be got in round and rectangular form.

I'm using this method to vent an islanded bathroom to the soffit over
the front door (being a straight joist run). If you are only venting to
the loft (to exhaust via the eaves) then you'd only need short duct runs
to allow the fans to go somewhere sensible and perhaps away from being
over the bedroom to reduce noise.

You also have the option to vent via more ductwork directly outside.

I got my ductwork from BES. I'll look up the fan if you like, but they
are not uncommon. You can get fairly subtle vents in a number of
finishes (white, brown, chrome) for the bedroom ceiling end and soffit
end (if required).

--
Tim Watts

Hung parliament? Rather have a hanged parliament.

Pyriform wrote:

I've decided these are a good idea, and I'd like to fit one. The
trouble is that the only suitable products I've found using google
are from US companies, designed for 110V. Does anyone know of a UK
supplier for this sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space (and thence outside), and draws cool air in through open
windows etc. The idea is that you run it when the house is too hot,
and the outside temperature is significantly cooler - typically to
cool things down at night after a very hot day.]

As heat rises just leave the loft hatch open and the house will vent
naturally, it's green to boot.

--
---
zaax
Frustration casues accidents: allow faster traffic to overtake.

On 28/05/10 20:46, Guy Dawson wrote:
On 28/05/2010 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The
trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

Your google-fu letting you down?

Try searching for

heat recovery ventilation


I don't think he wanted heat recovery (I was about to google, knowing
those are available here) untill I read it again...

--
Tim Watts

Hung parliament? Rather have a hanged parliament.

"zaax" wrote in message
news:qVTLn.7603$3B3.3043@hurricane...
Pyriform wrote:

I've decided these are a good idea, and I'd like to fit one. The
trouble is that the only suitable products I've found using google
are from US companies, designed for 110V. Does anyone know of a UK
supplier for this sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space (and thence outside), and draws cool air in through open
windows etc. The idea is that you run it when the house is too hot,
and the outside temperature is significantly cooler - typically to
cool things down at night after a very hot day.]

As heat rises just leave the loft hatch open and the house will vent
naturally, it's green to boot.
---
zaax


Seconded: passive ventilation is even very effective in hot deserts. Better
would be to have a fan to pump the warm air back down from the top of the
house in the winter than the other way round. Leaving loft hatch open and a
window downstairs creates plenty of cooling draught, and a fan would have to
be going it some to even keep up.

S

Tim Watts wrote:
On 28/05/10 20:46, Guy Dawson wrote:
On 28/05/2010 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The
trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

Your google-fu letting you down?

Try searching for

heat recovery ventilation


I don't think he wanted heat recovery (I was about to google, knowing
those are available here) untill I read it again...


Seems most replies arent what was wanted.
Beware of venting into the loft, condensation can cause problems.
Also you need to provide trapping of dust etc that might fall down
when fan not on.
However as a cooling method it is, if used only at the right times,
very good.


NT

Do you have a loft hatch door?

1. Create a new spare door with a large Xpelair ceiling fan fitted
into it - the very big ones are actually quite cheap (about £60 or so
for 300mm or something like that).
2. Fit a 5A socket near the loft hatch off the lighting final circuit.
3. Fit a battery powered heat alarm if you wish directly above in the
loft.
4. In summer fit the "fan loft hatch door", power up, done.

The heat alarm is in case the AC fan were to stall catch fire (Xpelair
will be EBM-Papst so will have a bimetallic strip cutout but this
cycles on & off so heat can build up quickly).

Realise house humidity will be pushed into the loft, which at night
will drop in temperature significantly - perhaps below the dew point
of that humid air causing condensation. Hence remove when the hottest
days of summer are gone.

Alternatively plumb the thing in properly with aluminium (or fire
rated) ducting to an outside vent in a gable end or soffit and a
backdraught shutter (otherwise it will bleed heat out when you do not
want it to such as winter). If the fan is quiet enough to run
overnight (you can get speed controllers) it will really make a
difference dropping downstairs temperatures.

Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

12" extractor or even a boxed in ceilng fan.

Loft condensation can be avoided by venting outdoors rather than to
loft.
Loft can have its own fan just to cool the loft, reducing conduction
to upstairs rooms
Advantage of separate room fans is that each can be controleld
thermostatically for best effect.

Do run these things on differential stats, otherwise the overall
effect is much reduced. And arrange them to provide heat for part of
the year.


NT

On 28 May, 16:42, "Pyriform" wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

Link he-
http://www.vent-axia.com/product/hre...gy-saving.html

On 28 May, 16:42, "Pyriform" wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

It's NEVER a good idea to vent air from the house into the roof space.
The roof space needs to be ventilated to the outside.
This is what you want.
http://www.vent-axia.com/product/hre...gy-saving.html

harry wrote:
On 28 May, 16:42, "Pyriform" wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

It's NEVER a good idea to vent air from the house into the roof space.
The roof space needs to be ventilated to the outside.
This is what you want.
http://www.vent-axia.com/product/hre...gy-saving.html

how would that cool a house?


NT

"Guy Dawson" wrote in message
...
On 28/05/2010 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble
is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

Your google-fu letting you down?

Try searching for

heat recovery ventilation

on UK sites.

My google-fu is in better shape than your reading-fu.

If I wanted a heat recovery system, I'd have searched for it. I don't, so I
didn't.

"zaax" wrote in message
news:qVTLn.7603$3B3.3043@hurricane...
Pyriform wrote:

I've decided these are a good idea, and I'd like to fit one. The
trouble is that the only suitable products I've found using google
are from US companies, designed for 110V. Does anyone know of a UK
supplier for this sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space (and thence outside), and draws cool air in through open
windows etc. The idea is that you run it when the house is too hot,
and the outside temperature is significantly cooler - typically to
cool things down at night after a very hot day.]

As heat rises just leave the loft hatch open and the house will vent
naturally, it's green to boot.

I know about natural convection, thanks.

And I want to install a fan, since forced cooling will be much more
effective, on those (relatively few) occasions when I need it.

"harry" wrote in message
...

It's NEVER a good idea to vent air from the house into the roof space.
The roof space needs to be ventilated to the outside.
This is what you want.
http://www.vent-axia.com/product/hre...gy-saving.html

No, that is not what I want.

"Tim Watts" wrote in message
...
On 28/05/10 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble
is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

How about a number of parallel units: axial fan, 4" ducting (rigid where
possible, flexi[1] at the end for any fiddly bits?

[1] Can be got in round and rectangular form.

I'm using this method to vent an islanded bathroom to the soffit over the
front door (being a straight joist run). If you are only venting to the
loft (to exhaust via the eaves) then you'd only need short duct runs to
allow the fans to go somewhere sensible and perhaps away from being over
the bedroom to reduce noise.

You also have the option to vent via more ductwork directly outside.

I got my ductwork from BES. I'll look up the fan if you like, but they are
not uncommon. You can get fairly subtle vents in a number of finishes
(white, brown, chrome) for the bedroom ceiling end and soffit end (if
required).

It looks like I will have to bodge something (unless anyone manages to
answer my actual question!). The problem will be getting a fan (or fans)
that shift enough air - bathroom extractor type fans are orders-of-magnitude
inadequate - and yet aren't industrial ventilators!

"js.b1" wrote in message
...
Do you have a loft hatch door?

1. Create a new spare door with a large Xpelair ceiling fan fitted
into it - the very big ones are actually quite cheap (about £60 or so
for 300mm or something like that).
2. Fit a 5A socket near the loft hatch off the lighting final circuit.
3. Fit a battery powered heat alarm if you wish directly above in the
loft.
4. In summer fit the "fan loft hatch door", power up, done.

The heat alarm is in case the AC fan were to stall catch fire (Xpelair
will be EBM-Papst so will have a bimetallic strip cutout but this
cycles on & off so heat can build up quickly).

Realise house humidity will be pushed into the loft, which at night
will drop in temperature significantly - perhaps below the dew point
of that humid air causing condensation. Hence remove when the hottest
days of summer are gone.

Alternatively plumb the thing in properly with aluminium (or fire
rated) ducting to an outside vent in a gable end or soffit and a
backdraught shutter (otherwise it will bleed heat out when you do not
want it to such as winter). If the fan is quiet enough to run
overnight (you can get speed controllers) it will really make a
difference dropping downstairs temperatures.

I quite like this idea - thanks. Would be a nice proof-of-concept without
making holes in any ceilings. I'll take a look at the Xpelair range to see
if they approach the sort of air flow I'm looking for (and which I haven't
actually calculated yet!)

On Fri, 28 May 2010 17:38:12 -0700 (PDT), NT wrote:
Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

12" extractor or even a boxed in ceilng fan.

Loft condensation can be avoided by venting outdoors rather than to
loft.

Wouldn't you only get condensation if the loft (either air, contents or
fabric) was cooler than the incoming air? In my house in the summer the
loft is the warmest place as the sun heats the tiles, since the insulation
is between the loft floor and the first floor ceiling. So venting from the
house into the loft will introduce cooler air into the loftspace.

On 29/05/10 09:58, Pyriform wrote:
"Tim Watts" wrote in message
...
On 28/05/10 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The
trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space
(and thence outside), and draws cool air in through open windows etc.
The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

How about a number of parallel units: axial fan, 4" ducting (rigid
where possible, flexi[1] at the end for any fiddly bits?

[1] Can be got in round and rectangular form.

I'm using this method to vent an islanded bathroom to the soffit over
the front door (being a straight joist run). If you are only venting
to the loft (to exhaust via the eaves) then you'd only need short duct
runs to allow the fans to go somewhere sensible and perhaps away from
being over the bedroom to reduce noise.

You also have the option to vent via more ductwork directly outside.

I got my ductwork from BES. I'll look up the fan if you like, but they
are not uncommon. You can get fairly subtle vents in a number of
finishes (white, brown, chrome) for the bedroom ceiling end and soffit
end (if required).

It looks like I will have to bodge something (unless anyone manages to
answer my actual question!). The problem will be getting a fan (or fans)
that shift enough air - bathroom extractor type fans are
orders-of-magnitude inadequate - and yet aren't industrial ventilators!



Some of those inline fans can shift a fair volume - don't think
"bathroom" necessarily, think "inline fan" - the question is, how much
do you want? I've never been impressed with bathroom ventilation so I
got a higher rated inline fan for mine.

Ultimately, there's only so much you can shift up a 4" duct and vent
(unless you were planning to put more or larger vents in each room?).

Regarding homebrew, if you could get a bigger fan, making a distribution
box out of ply and lined with acoustic dampening with 4" spigots
wouldn't be too hard, with the fan inside to cut down noise. I wonder if
googling for 6"/150mm fans would lead to something...

Regarding readybuilt, there much be something in the 6" area. I'm
thinking offices where the loos have several 4" vents and ducts feeding
into a 6" or bigger duct with something (which I never saw) on the other
end.

--
Tim Watts

Hung parliament? Rather have a hanged parliament.

"pete" wrote in message
...
On Fri, 28 May 2010 17:38:12 -0700 (PDT), NT wrote:
Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble
is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space
(and thence outside), and draws cool air in through open windows etc.
The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

12" extractor or even a boxed in ceilng fan.

Loft condensation can be avoided by venting outdoors rather than to
loft.

Wouldn't you only get condensation if the loft (either air, contents or
fabric) was cooler than the incoming air? In my house in the summer the
loft is the warmest place as the sun heats the tiles, since the insulation
is between the loft floor and the first floor ceiling. So venting from the
house into the loft will introduce cooler air into the loftspace.

It could be an issue if the night is very cold (and the loft is insulated
only at floor level). For what I have in mind, I don't envisage there being
a problem.

On Sat, 29 May 2010 09:58:52 +0100, Pyriform wrote:
"Tim Watts" wrote in message
...
On 28/05/10 16:42, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble
is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

How about a number of parallel units: axial fan, 4" ducting (rigid where
possible, flexi[1] at the end for any fiddly bits?

[1] Can be got in round and rectangular form.

I'm using this method to vent an islanded bathroom to the soffit over the
front door (being a straight joist run). If you are only venting to the
loft (to exhaust via the eaves) then you'd only need short duct runs to
allow the fans to go somewhere sensible and perhaps away from being over
the bedroom to reduce noise.

You also have the option to vent via more ductwork directly outside.

I got my ductwork from BES. I'll look up the fan if you like, but they are
not uncommon. You can get fairly subtle vents in a number of finishes
(white, brown, chrome) for the bedroom ceiling end and soffit end (if
required).

It looks like I will have to bodge something (unless anyone manages to
answer my actual question!). The problem will be getting a fan (or fans)
that shift enough air - bathroom extractor type fans are orders-of-magnitude
inadequate - and yet aren't industrial ventilators!

Some years ago I bodged up a forced-air vent from the first floor out
through an open window. I used a 15" fixed fan, some flexible metal ducting,
cardboard and duct tape. The cardboard / tape was to make a funnel over the
fan's outflow to direct air along the duct, out of a nearby window.
It did have a noticable effect on the heat in the house, but caused a lot
of vibration which resonated and was nearly as annoying as the heat.

On 29/05/10 10:07, pete wrote:
On Fri, 28 May 2010 17:38:12 -0700 (PDT), NT wrote:
Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

12" extractor or even a boxed in ceilng fan.

Loft condensation can be avoided by venting outdoors rather than to
loft.

Wouldn't you only get condensation if the loft (either air, contents or
fabric) was cooler than the incoming air? In my house in the summer the
loft is the warmest place as the sun heats the tiles, since the insulation
is between the loft floor and the first floor ceiling. So venting from the
house into the loft will introduce cooler air into the loftspace.

I don't think that would be a problem - the loft structure is hot so no
risk of condensation.

Given the OP's stated use (cooling a hot house in summer) I don't think
even the risk of introducing a little extra humidity that may condense
in the cool wee hours is worth worrying about either - it will clear the
next day. Wood rot comes from sustained condensation, not a bit once in
a while.

The only risk I see is running such a system in the winter - that would
be bad, so I suggest making provision to lock it off.

--
Tim Watts

Hung parliament? Rather have a hanged parliament.

"Tim Watts" wrote in message
...
Some of those inline fans can shift a fair volume - don't think "bathroom"
necessarily, think "inline fan" - the question is, how much do you want?
I've never been impressed with bathroom ventilation so I got a higher
rated inline fan for mine.

Fair point. I haven't calculated how much air I need to shift yet. The US
DOE has some guidelines, which some US whole-house fan makers think are a
bit high, so I'll do some more research and some sums and then revisit
inline fans. The ones I briefly looked at didn't come close to the airflow
of the US products.

Ultimately, there's only so much you can shift up a 4" duct and vent
(unless you were planning to put more or larger vents in each room?).

I'm rather liking another poster's idea of making a special loft hatch, with
a big fan venting directly into the loft space, at least to start with.
Ducting and multiple inlets might come later!

Thanks for your ideas.

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Pyriform"
saying something like:

I've decided these are a good idea,

I've always been a fan of a whole house. Much preferable to just two
walls and a half-finished roof.

On 29 May, 09:39, NT wrote:
harry wrote:
On 28 May, 16:42, "Pyriform" wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

It's NEVER a good idea to vent air from the house into the roof space.
The roof space needs to be ventilated to the outside.
This is what you want.
http://www.vent-axia.com/product/hre...gy-saving.html

how would that cool a house?

NT- Hide quoted text -

- Show quoted text -

If you want to cool your house, be sensible, get an air-to-air
reversible heat pump. Heats as well as cools.
http://www.cooleasy.co.uk/
Natural convection cooling is just ********. Or just open the window.
On hot days, your roof space will be the hottest place in the house.
On cold days it will be the coldest place in the house

On Fri, 28 May 2010 16:42:14 +0100, "Pyriform"
wrote:

I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

If you're planning on using a large extractor fan, take great care if
you have any open gas fires (or even gas hobs) in the house, in case
your extractor diverts the fumes away from the proper flue/s into the
room.

--
Frank Erskine

harry wrote:
On 29 May, 09:39, NT wrote:
harry wrote:
On 28 May, 16:42, "Pyriform" wrote:

I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

It's NEVER a good idea to vent air from the house into the roof space.
The roof space needs to be ventilated to the outside.
This is what you want.
http://www.vent-axia.com/product/hre...gy-saving.html

how would that cool a house?

NT- Hide quoted text -

- Show quoted text -

If you want to cool your house, be sensible, get an air-to-air
reversible heat pump. Heats as well as cools.
http://www.cooleasy.co.uk/
Natural convection cooling is just ********. Or just open the window.
On hot days, your roof space will be the hottest place in the house.
On cold days it will be the coldest place in the house

Ah, so it wont cool your house. But what the OP asked for does.


NT

On Friday, May 28, 2010 at 4:42:14 PM UTC+1, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

Pyriform, did you ever get a useful reply to this? I know what you mean, having lived in the US we had one of these whole house fans in our house and it was fantastic, meant we did not need to have air conditioning installed.. With hotter summer days on the increase here in the U.K., Im interested to get one put in the house here. Our loft is already ventilated, but I cant find the right kind of fan. Thanks.

On 01/07/20 10:17, wrote:
On Friday, May 28, 2010 at 4:42:14 PM UTC+1, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

Pyriform, did you ever get a useful reply to this? I know what you mean, having lived in the US we had one of these whole house fans in our house and it was fantastic, meant we did not need to have air conditioning installed. With hotter summer days on the increase here in the U.K., Im interested to get one put in the house here. Our loft is already ventilated, but I cant find the right kind of fan. Thanks.

You're replying to a 10-year old post.

Another Dave

--
Change nospam to techie

With hotter summer days on the increase here in the U.K.
********

Back in the 50s and early 60s I remember headlines of 90-100F temperatures

I haven't seen it over 30°C in the last 20 years

--
Theres a mighty big difference between good, sound reasons and reasons
that sound good.

Burton Hillis (William Vaughn, American columnist)

On Wed, 01 Jul 2020 12:21:43 +0100, The Natural Philosopher wrote:

With hotter summer days on the increase here in the U.K.
********

Back in the 50s and early 60s I remember headlines of 90-100F
temperatures

I haven't seen it over 30°C in the last 20 years

June 2017 and 2019 were not 20 years ago but maybe you were in the wrong
location to experience them.

On 01/07/2020 12:21, The Natural Philosopher wrote:

With hotter summer days on the increase here in the U.K.
********

Back in the 50s and early 60s IÂ* remember headlines of 90-100F temperatures

I haven't seen it over 30°C in the last 20 years

Really? Peak was over 30C here only last week and for a couple of days.

And that is in rural North Yorkshire where it is usually pretty
temperate rather than the heat bubble of London or Manchester.

I also recall the very hot summers of the mid 70's too. 1976 had a
massive drought, a plague of lady birds and 1977 wasn't that far behind.

--
Regards,
Martin Brown

On 01/07/2020 13:44, Bev wrote:
On Wed, 01 Jul 2020 12:21:43 +0100, The Natural Philosopher wrote:

With hotter summer days on the increase here in the U.K.
********

Back in the 50s and early 60s I remember headlines of 90-100F
temperatures

I haven't seen it over 30°C in the last 20 years

June 2017 and 2019 were not 20 years ago but maybe you were in the wrong
location to experience them.

they weren't as hot as things were in the 50s and 60s


--
Truth welcomes investigation because truth knows investigation will lead
to converts. It is deception that uses all the other techniques.

On 01/07/2020 15:04, The Natural Philosopher wrote:
On 01/07/2020 13:44, Bev wrote:
On Wed, 01 Jul 2020 12:21:43 +0100, The Natural Philosopher wrote:

With hotter summer days on the increase here in the U.K.
********

Back in the 50s and early 60s IÂ* remember headlines of 90-100F
temperatures

I haven't seen it over 30°C in the last 20 years

June 2017 and 2019 were not 20 years ago but maybe you were in the wrong
location to experience them.

they weren't as hot as things were in the 50s and 60s



Not in my experience though. The overriding memory of that
era was the winter of 1962/63 and not any particularly hot
summer.

expressed precisely :
With hotter summer days on the increase here in the U.K.,

I remain unconvinced.

Im interested to
get one put in the house here.

Simple way to keep a house cool, at least for several hot days, is to
keep windows closed and pull down blinds, during the heat of the day.
On an evening, once the outdoors cools down some, open the windows.

During the hot spell of last week, indoors it never exceeded a
comfortable 23.5C, when I was recording 31.5C outdoors.

On Wed, 01 Jul 2020 15:04:56 +0100, The Natural Philosopher wrote:

On 01/07/2020 13:44, Bev wrote:
On Wed, 01 Jul 2020 12:21:43 +0100, The Natural Philosopher wrote:

With hotter summer days on the increase here in the U.K.
********

Back in the 50s and early 60s I remember headlines of 90-100F
temperatures

I haven't seen it over 30°C in the last 20 years

June 2017 and 2019 were not 20 years ago but maybe you were in the
wrong location to experience them.

they weren't as hot as things were in the 50s and 60s

Changing your argument I see. You said you hadn't seen it over 30°C in
the last 20 years. I pointed out your lapse of memory.

On Wednesday, 1 July 2020 16:11:31 UTC+1, wrote:

Simple way to keep a house cool, at least for several hot days, is to
keep windows closed and pull down blinds, during the heat of the day.
On an evening, once the outdoors cools down some, open the windows.

During the hot spell of last week, indoors it never exceeded a
comfortable 23.5C, when I was recording 31.5C outdoors.

Trouble is that leaving all windows open overnight is seldom practical. A fan enables leaving them locked ajar.


NT

Would one of those not be rather noisy?
I thought heat pumps were the in thing these days performing the job of
cooling and heating.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
wrote in message
...
On Friday, May 28, 2010 at 4:42:14 PM UTC+1, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble
is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

Pyriform, did you ever get a useful reply to this? I know what you mean,
having lived in the US we had one of these whole house fans in our house and
it was fantastic, meant we did not need to have air conditioning installed.
With hotter summer days on the increase here in the U.K., I'm interested to
get one put in the house here. Our loft is already ventilated, but I can't
find the right kind of fan. Thanks.

They know that, its basically a new plea, did you not read what was said, or
did you only read as far as the first date?
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Another Dave" wrote in message
...
On 01/07/20 10:17, wrote:
On Friday, May 28, 2010 at 4:42:14 PM UTC+1, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble
is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space
(and thence outside), and draws cool air in through open windows etc.
The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at
night
after a very hot day.]

Pyriform, did you ever get a useful reply to this? I know what you mean,
having lived in the US we had one of these whole house fans in our house
and it was fantastic, meant we did not need to have air conditioning
installed. With hotter summer days on the increase here in the U.K., I'm
interested to get one put in the house here. Our loft is already
ventilated, but I can't find the right kind of fan. Thanks.

You're replying to a 10-year old post.

Another Dave

--
Change nospam to techie

On 01/07/20 10:17, wrote:
On Friday, May 28, 2010 at 4:42:14 PM UTC+1, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic space
(and thence outside), and draws cool air in through open windows etc. The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down at night
after a very hot day.]

Pyriform, did you ever get a useful reply to this? I know what you mean, having lived in the US we had one of these whole house fans in our house and it was fantastic, meant we did not need to have air conditioning installed. With hotter summer days on the increase here in the U.K., Im interested to get one put in the house here. Our loft is already ventilated, but I cant find the right kind of fan. Thanks.

Try here https://www.johnsonandstarley.co.uk/products/ventilation.

--

Jeff

On 02/07/2020 08:57, Jeff Layman wrote:
On 01/07/20 10:17, wrote:
On Friday, May 28, 2010 at 4:42:14 PM UTC+1, Pyriform wrote:
I've decided these are a good idea, and I'd like to fit one. The
trouble is
that the only suitable products I've found using google are from US
companies, designed for 110V. Does anyone know of a UK supplier for this
sort of thing?

[For anyone who doesn't know what I'm on about, a whole house fan is a
fairly powerful fan that vents hot air from the house into the attic
space
(and thence outside), and draws cool air in through open windows etc.
The
idea is that you run it when the house is too hot, and the outside
temperature is significantly cooler - typically to cool things down
at night
after a very hot day.]

Pyriform, did you ever get a useful reply to this?Â* I know what you
mean, having lived in the US we had one of these whole house fans in
our house and it was fantastic, meant we did not need to have air
conditioning installed.Â* With hotter summer days on the increase here
in the U.K., Im interested to get one put in the house here.Â* Our
loft is already ventilated, but I cant find the right kind of fan.
Thanks.

Try here https://www.johnsonandstarley.co.uk/products/ventilation.

Of course the issue is in the statement that: "and draws cool air in
through open windows etc."

Only if your house has extreme solar gain and no roof insulation is it
going to be warmer inside than out


In hot summer here with 30C outside it is rare to see the inside go
aboven15. At night I open the windows., By day I close the windows and
draw the curtains

--
"The most difficult subjects can be explained to the most slow witted
man if he has not formed any idea of them already; but the simplest
thing cannot be made clear to the most intelligent man if he is firmly
persuaded that he knows already, without a shadow of doubt, what is laid
before him."

- Leo Tolstoy