Hi all,

the split aircon unit we bought last spring did a cool job cooling the
bedroom down, but it also has a heat function. I have tried this and it
gets a room upto 18c in no time...im sure it is more economical than using
other forms heating as the unit only draws 1.2kw when operating. Is there
any info online about using them for heating?

cheers

Steve

In message ,
R.P.McMurphy writes
the split aircon unit we bought last spring did a cool job cooling the
bedroom down, but it also has a heat function. I have tried this and
it gets a room upto 18c in no time...im sure it is more economical than
using other forms heating as the unit only draws 1.2kw when operating.
Is there any info online about using them for heating?

Include the term "heat pump" in your search. Heating a house with a
heat pump (what's in most AC units) is very efficient.

--
Clive Mitchell
http://www.bigclive.com

On Fri, 09 Mar 2007 11:21:25 +0000, Clive Mitchell wrote:

In message ,
R.P.McMurphy writes
the split aircon unit we bought last spring did a cool job cooling the
bedroom down, but it also has a heat function. I have tried this and
it gets a room upto 18c in no time...im sure it is more economical than
using other forms heating as the unit only draws 1.2kw when operating.
Is there any info online about using them for heating?

Include the term "heat pump" in your search. Heating a house with a
heat pump (what's in most AC units) is very efficient.

But is that what it does when it's heating? Does it chuck cold air out of
where it would put out warm air when it's cooling (IYSWIM)?

But is that what it does when it's heating? Does it chuck cold air out of
where it would put out warm air when it's cooling (IYSWIM)?

Exactly right, hence the term "Heat Pump".
The down side is that they generally don't work at low outside
temperatures.

John

In article m, John
writes

But is that what it does when it's heating? Does it chuck cold air out of
where it would put out warm air when it's cooling (IYSWIM)?

Exactly right, hence the term "Heat Pump".
The down side is that they generally don't work at low outside
temperatures.

John

No they don't!. The one we have is fine except when it gets down to say
less than 2-3 deg c when it spends a lot of time defrosting itself which
means that its taking quite a bit off the mains in order to so that, but
anything above those temps, its fine.

If you could imagine its working in reverse to what its doing in the
summer months.. its trying to "cool" the outside air and get rid of the
heat inside the room!...
--
Tony Sayer

"tony sayer" wrote in message
...
In article m, John
writes

But is that what it does when it's heating? Does it chuck cold air out
of
where it would put out warm air when it's cooling (IYSWIM)?

Exactly right, hence the term "Heat Pump".
The down side is that they generally don't work at low outside
temperatures.

John

No they don't!. The one we have is fine except when it gets down to say
less than 2-3 deg c when it spends a lot of time defrosting itself which
means that its taking quite a bit off the mains in order to so that, but
anything above those temps, its fine.

If you could imagine its working in reverse to what its doing in the
summer months.. its trying to "cool" the outside air and get rid of the
heat inside the room!...
--
Tony Sayer


However, don't some just have a "fan heater" type of element to provide
heating? Simpler and cheaper models.

In message , tony sayer
writes
No they don't!. The one we have is fine except when it gets down to say
less than 2-3 deg c when it spends a lot of time defrosting itself
which means that its taking quite a bit off the mains in order to so
that, but anything above those temps, its fine.

If you could imagine its working in reverse to what its doing in the
summer months.. its trying to "cool" the outside air and get rid of the
heat inside the room!...

But where heat pumps really do work for heating is where there's a
modestly accessible geothermal source. This could be a bit of pipe laid
at a modest depth under the garden or a heat extractor in a local
stream.

Not particularly easy DIY projects though.

--
Clive Mitchell
http://www.bigclive.com

In article ,
tony sayer writes:
No they don't!. The one we have is fine except when it gets down to say
less than 2-3 deg c when it spends a lot of time defrosting itself which
means that its taking quite a bit off the mains in order to so that, but
anything above those temps, its fine.

Same with mine. Useful if you are working at home and only want
to heat that room too, rather than the whole house.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

"John" wrote in message
s.com...

But is that what it does when it's heating? Does it chuck cold air out of
where it would put out warm air when it's cooling (IYSWIM)?

Exactly right, hence the term "Heat Pump".
The down side is that they generally don't work at low outside
temperatures.

John


I.ve checked the unit's label, it says 1280w input power for 13000 btu
output. 13000btu is 3.8kw...seems a good way to heat my house...will defo
be using it more often from now on!

Steve

On Sat, 10 Mar 2007 18:51:11 -0000, "R.P.McMurphy"
wrote:


"John" wrote in message
ps.com...

But is that what it does when it's heating? Does it chuck cold air out of
where it would put out warm air when it's cooling (IYSWIM)?

Exactly right, hence the term "Heat Pump".
The down side is that they generally don't work at low outside
temperatures.

John


I.ve checked the unit's label, it says 1280w input power for 13000 btu
output. 13000btu is 3.8kw...seems a good way to heat my house...will defo
be using it more often from now on!

Steve



Interesting if Cost{electricity) 3 x Cost (gas)


--

..andy

"R.P.McMurphy" wrote in message
...

"John" wrote in message
s.com...

But is that what it does when it's heating? Does it chuck cold air out
of
where it would put out warm air when it's cooling (IYSWIM)?

Exactly right, hence the term "Heat Pump".
The down side is that they generally don't work at low outside
temperatures.

John


I.ve checked the unit's label, it says 1280w input power for 13000 btu
output. 13000btu is 3.8kw...seems a good way to heat my house...will defo
be using it more often from now on!

Steve

That is a rating at certain temperatures only usually around 15 deg'c
outdoor temp (and besides the Ebay Chinese specials are notoriously dodgy
with their ratings.) the lower the outdoor temperature the closer to 1:1 it
gets. However the better the manufacturer is the lower the outdoor temp can
be before that point is reached.

If it's on this list

http://www.eca.gov.uk/etl/find/_P_He...b=ResultsPanel

it's worth considering however some are still more energy efficient than
others. The best overall in my view are Daikin but even within their own
range of splits strangely some of them are more efficient than others.

The added bonus from this list is that anything on it has a 5% VAT levy.
This applies to the unit and associated building costs. Whatever that might
mean ;-)

Cheers

Richard