Air Source Heat Pump

[The Moose]

Is anyone here using an air source heat pump as their sole means of heating and/or cooling?

[The Moose]

Any things to look for/avoid?

Looking to heat/cool circa 400sqm.

Is it as efficient (financially) as it's made out to be?

Just looking for a viable alternative to oil

[The Moose]

Richie Slow]We've had it at work for a couple of years now. Very cheap to run but it does freeze up quite a lot when temps are near zero. This requires a ten minute [or so said:

period where it defrosts itself and re-starts. Can be quite annoying, but we are generally happy with it and it works as aircon in the summer too.

Interesting. Does it de-ice automatically?

Do you mind if I ask what make/model you have?

Edited by The Moose on Thursday 8th October 20:52

[The Moose]

Thanks for all the great information so far chaps. Most useful!

We plan to have no rads at all - all wet underfloor heating which I understand is better for air source heat pumps as it runs at a lower temperature.

How is air source for hot water?

Do you chaps have any backups of some sort? I presume an immersion heater for the hot water?

[The Moose]

Of you with ASHPs, who had them designed by an engineer? Was it worth it?

We're looking at having circa 4,000sqft over 2 floors heated (underfloor heating only). Hot water for 6 bath/shower rooms and 2 w/cs and heated towel rails in the bathrooms.

Sounds not insignificant in terms of the type of system we'll need!

[The Moose]

Anyone used an engineer?!