Air Conditioners and fans

dc

Jefft wrote: »

Nearer 250-300% efficient. More likely 1KW so around 10p per hour.

Yes I just looked at the back of our old 8000Btu one and that uses 830 watts.
But they do have 'stats so the compressor will not be running 24/7

The efficiency is surprisingly low when there have been heat pumps around with 1200% efficiency. :rolleyes:

shakka

PeteHerts wrote: »

As I said before I've got an Aircon at home which I love but I've bought this below for when I go to stay at me mums.




Have u tried this one yet? Is it any good?

richardc1983

Im on a coin meter in my flat and I previously had a 12000btu portable air conditioner, they all use similar ammounts of electricity, well it used to use about £8 or £9 a day in coins a day in summer when it was running all day long to cool my lounge!

I have in the last week had installed a multi split air conditioning installed, this is fixed air conditioning where you have an inside unit and a condenser unit outside on the wall. Its an inverter system which means the outdoor unit goes at the speed it needs to so if the room is really hot the compressor will run fast and slow down as room temperture goes down, meaning BIG energy savings and electrical savings.

I have 2 indoor units, one in the lounge and my bedroom connected to the outdoor unit and im shocked at how little it uses. Over the entire weekend of both units being switched on day and night it has used about £1 of electric.

For what I paid for the sytstem to be instqalled, it is LG equipment it is well worth it for the savings in electric im getting now.

And the bonus is that it does heating also, and is as cheap to run!

U burn 1.3kw of electric but get 4kw of heat output from it!!

sicandar

Richard - Can you show us (or a link to) the model of split air conditioner you got?

richardc1983

http://uk.lge.com/products/model/detail/outdoorunits_fm25ah.jhtml is the outdoor unit

http://uk.lge.com/products/model/detail/indoorconvertible_mv12ah.jhtml is the indoor unit i have 2 of these 1 for lounge and bedroom

They both connect upto the outdoor unit, u can have different temperatures in each room but they both have to be in cooling mode or heating mode.

Theres a page here on the other multi split units they do http://www.wave-hr.co.uk/pdf/lg/2008/LG%202008%20Multis.pdf

Read through the sales brochure here http://uk.lge.com/products/sidemenu/list/airconditioning%7Cwallmounted_PRD%7CBROC_broclist.jhtml

Just to clarify a multi split is multiple units running off the same outdoor unit the same as i have, and the single split system is one unit to 1 outdoor unit.

PeteHerts

shakka wrote: »

PeteHerts wrote: »

As I said before I've got an Aircon at home which I love but I've bought this below for when I go to stay at me mums.




Have u tried this one yet? Is it any good?

I only ordered this last night so I don't know yet.
It has been reduced from £79.99 to £39.99.

dazzer68

the above are ok, but they arent air conditioing they are just air coolers, you have ice blocks which you have to freeze in your freezer, then put in the water tray in the back fill with water, then theres a clothe which is on a conveyor belt which passes through the cold water up over a fan which blows the cold water out.i hope that makes sense. as a fan they are good as air con youd be dissappointed. but at £39 quid from maplins its a bargain just for taking some heat out the room, but dont expect it to take degrees off.

4810510

richardc1983 wrote: »

I have 2 indoor units, one in the lounge and my bedroom connected to the outdoor unit and im shocked at how little it uses. Over the entire weekend of both units being switched on day and night it has used about £1 of electric.

For what I paid for the sytstem to be instqalled, it is LG equipment it is well worth it for the savings in electric im getting now.

And the bonus is that it does heating also, and is as cheap to run!

U burn 1.3kw of electric but get 4kw of heat output from it!!

Richard, this sounds a great option but can you give us an idea of what it cost to purchase and install?

Jefft_2

dc wrote: »

Yes I just looked at the back of our old 8000Btu one and that uses 830 watts.
But they do have 'stats so the compressor will not be running 24/7

The efficiency is surprisingly low when there have been heat pumps around with 1200% efficiency. :rolleyes:

I am not aware of any heatpump giving out more than 350% which as far as I know is the best achievable.

Perhaps you could give a link to any that exceed this.

Jefft_2

From Wikipedia

Air source heat pumps are relatively easy (and inexpensive) to install and have therefore historically been the most widely used heat pump type. However, they suffer limitations due to their use of the outside air as a heat source or sink. The higher temperature differential during periods of extreme cold or heat leads to a lower efficiency, as explained above. In mild weather, COP may be around 3.5, while at temperatures below around −5°C (23°F) an air-source heat pump's COP will drop below 2. The average COP over seasonal variation is typically 2.5-2.8.