I installed the nuaire heat back in november in a small 2 bedroomed house. These are brilliant !!. Never open windows now. House is near bone dry. I use setting 2. I never use the heat option. I suggest a normal drimaster and use your central heating with it. Very slight breeze at top of stairs.
I am a chartered engineer and had tried everything to sort the damp.. all added up a bit (trickle vents, bathroom in line fan, cooker hood,washing out on line etc) but nothing was really sorting it. Trickle vents actually made it worse as they drop the temperature and so lower the dew point. Then came the nuaire drimaster.... brilliant!! Believe the hype and buy one. I was very sceptical of these based on all the amazon reviews etc but i am so happy with my purchase.. problem solved.