Andyh

I got the feeling the chap I was talking to (at least for the heating sizing) took the room area and multiplied by a factor that depended on on how well I said the room was insulated. I think he had 3 values ranging from poor to very good. I suspect the units are twice what I need, but my calculations could be wrong so I wouldn't like to be too confident on that. Also I suspect a fuller survey will be done if I move forward.

I did look at these, but they seemed to require a couple of humungous holes cut in the wall which put me off

Hi all, new to forum, I have a question on A2A heat pumps. We have a fairly well renovated/insulated bungalow, currently heated with a log burner and oil boiler. I'm currently awaiting quotes for an A2A heat pump, probably a 2-way multi-split system to heat the living areas (effectively front/back of house). Current thinking is for 2 wall mounted units, these would cause the least disruption to the present house layout, however one unit could be floor standing without too much inconvenience. My question is, is there a benefit on floor standing over wall mounted internal units? The floor mounted are more expensive, but logic seems to tell me that a heat source low down should be a better solution (installer says no!). 2nd question, I have a fairly good idea on what I think the heat loss of the 2 spaces is. I wont be surprised if the quotes I receive will be over spec'd, what's the general feeling on this? Is it better to err on the side of caution and put in slightly more powerful units than might be needed or is this wasting money and likely to make the system less efficient?