Most simple split domestic aircon setups seem to have a wall mounted unit
which is more or less opposite the external chiller.

The most logical setup for me would be the fan unit on the upstairs
landing on the ceiling, so it could (attempt to) cool the whole house.

Presumably no more complex that installing a loft hatch, possibly easier.

Has anyone on here done this kind of installation?

More Googling this evening but the sun is shining...

Cheers


Dave R


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On 19/04/2018 13:36, David wrote:

Most simple split domestic aircon setups seem to have a wall mounted unit
which is more or less opposite the external chiller.

The most logical setup for me would be the fan unit on the upstairs
landing on the ceiling, so it could (attempt to) cool the whole house.

Proper AC is more that just adding cold air - it also needs to collect
and dehumidify the warm wet air. So trying to do a whole house with only
one air handler is going give a pretty poor performance with the only
room that's properly comfortable being the one you are not in most of
the time!

Presumably no more complex that installing a loft hatch, possibly easier.

Yup the cassette style ceiling mount ones are easy enough to install.

Note that one external unit can support multiple internal air handlers
ins some cases. So you may find that cooling the rooms you actually want
to is easier than you might expect.

Has anyone on here done this kind of installation?

Not personally.

There is a good article on the install of a pre-charged split unit on
the wiki:

http://wiki.diyfaq.org.uk/index.php/...ir_Conditioner

Most of that would be applicable to ceiling mounted air handlers as well
(if you can get a precharged one)


More Googling this evening but the sun is shining...

Cheers


Dave R




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Cheers,

John.

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On Thu, 19 Apr 2018 13:47:29 +0100, John Rumm wrote:

On 19/04/2018 13:36, David wrote:

Most simple split domestic aircon setups seem to have a wall mounted
unit which is more or less opposite the external chiller.

The most logical setup for me would be the fan unit on the upstairs
landing on the ceiling, so it could (attempt to) cool the whole house.

Proper AC is more that just adding cold air - it also needs to collect
and dehumidify the warm wet air. So trying to do a whole house with only
one air handler is going give a pretty poor performance with the only
room that's properly comfortable being the one you are not in most of
the time!

Presumably no more complex that installing a loft hatch, possibly
easier.

Yup the cassette style ceiling mount ones are easy enough to install.

Note that one external unit can support multiple internal air handlers
ins some cases. So you may find that cooling the rooms you actually want
to is easier than you might expect.

Has anyone on here done this kind of installation?

Not personally.

There is a good article on the install of a pre-charged split unit on
the wiki:

http://wiki.diyfaq.org.uk/index.php/...ir_Conditioner

Most of that would be applicable to ceiling mounted air handlers as well
(if you can get a precharged one)


More Googling this evening but the sun is shining...

Thanks - after I posted I saw a unit with multiple internal air handlers
and wondered.

I have a back wall which is easily accessible from a metal sloping roof
and a spare power feed which used to be to an electric shower (now just a
spur to some loft sockets) so the location for the outside part seems
straightforward.

Feeding the chilled {whatever} through the loft and down through the
ceiling also looks straightforward.

So cooling upstairs rooms looks to be possible without too much structural
work. Doing anything downstairs seems a lot more complicated which was why
cooling the landing over the stairs seemed to be an option for taking the
rest of the house down a degree or two.

Cheers



Dave R



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AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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On 19/04/2018 14:26, David wrote:


So cooling upstairs rooms looks to be possible without too much structural
work. Doing anything downstairs seems a lot more complicated which was why
cooling the landing over the stairs seemed to be an option for taking the
rest of the house down a degree or two.


I'd expect that to work. Unless you have a room with large French
windows that get direct sunlight, especially if it is a bit remote from
the stairs. (My late mother had one such room, ideally I would have
fitted an external awning; in the peak season she used one of the mobile
units with a hose through the window).

On Thursday, 19 April 2018 13:47:13 UTC+1, John Rumm wrote:
Most of that would be applicable to ceiling mounted air handlers as well
(if you can get a precharged one)

I would expect that if you do all the installation and route the refrigerant pipes it wouldn't be that expensive for a refrigeration engineer to come and connect and charge up the system.

Owain

I have a loft hatch at the top of the stairs, ideal dual use?
Brian

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"David" wrote in message
...
Most simple split domestic aircon setups seem to have a wall mounted unit
which is more or less opposite the external chiller.

The most logical setup for me would be the fan unit on the upstairs
landing on the ceiling, so it could (attempt to) cool the whole house.

Presumably no more complex that installing a loft hatch, possibly easier.

Has anyone on here done this kind of installation?

More Googling this evening but the sun is shining...

Cheers


Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

---
This email has been checked for viruses by Avast antivirus software.
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On Thursday, 19 April 2018 13:36:14 UTC+1, David WE Roberts (Google) wrote:
Most simple split domestic aircon setups seem to have a wall mounted unit
which is more or less opposite the external chiller.

The most logical setup for me would be the fan unit on the upstairs
landing on the ceiling, so it could (attempt to) cool the whole house.

Presumably no more complex that installing a loft hatch, possibly easier.

Has anyone on here done this kind of installation?

More Googling this evening but the sun is shining...

Cheers


Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

Buy yourself a reversible heat pump.
Ac is only needed for about two days a year in the UK.
If that.

On 20/04/2018 09:16, harry wrote:
On Thursday, 19 April 2018 13:36:14 UTC+1, David WE Roberts (Google) wrote:
Most simple split domestic aircon setups seem to have a wall mounted unit
which is more or less opposite the external chiller.

The most logical setup for me would be the fan unit on the upstairs
landing on the ceiling, so it could (attempt to) cool the whole house.

Presumably no more complex that installing a loft hatch, possibly easier.

Has anyone on here done this kind of installation?

More Googling this evening but the sun is shining...

Cheers


Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

Buy yourself a reversible heat pump.
Ac is only needed for about two days a year in the UK.
If that.


Most of the split units *are* reversible. And, unlike a heat pump,
include the two heat exchangers that you also need.

In article ,
newshound writes:
On 20/04/2018 09:16, harry wrote:
Buy yourself a reversible heat pump.
Ac is only needed for about two days a year in the UK.
If that.


Most of the split units *are* reversible. And, unlike a heat pump,
include the two heat exchangers that you also need.

I installed a self-fit split unit 13 years ago for cooling, but
actually I use it for heating probably 10x more. It's in my work
room, and I work mostly from home, so I use it for heating just
that room rather than the whole house during the working day.

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Andrew Gabriel
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