Fair enough - although not that much different from the usual system which pumps the stale humid air out, provided there is a means for some cold outside air to come in to replace it! Either way, in the absence of 'heat recovery' systems, one is replacing (expensively!) heated air with cold outside air, at least during cold periods of the year!It's not a fan per se but a positive input ventilation system. The idea is it sucks in filtered air from outside, creating positive pressure in the house which pushes the stale humid internal air out through whatever gaps exist in walls/windows/doors etc. Its meant to stop build of condensation and allergens etc Well we'll see if it works.
Condensation occurs when moisture-laden air comes in contact with cold walls. Getting the room (including the walls) as hot as possible before the 'steam' is produced would therefore presumably help to some extent.Yes, the heat loss is not ideal but hopefully better than my current option which is having the windows open in winter, which still doesn't seem to solve the issue of condensation and my wife's allergies. I'm sceptical as well.
Fair enough.Would have gone for a 2 way vented heat recovery system but my flat isn't suitable for it apparently (needs to be better insulated and air tight).
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