yes and no. there is a setting (not sure what they call it) which is how much air it normally kicks out when its idle (ie: temperature in ceiling is lower than setting on controller). the setting is from 1 to 6 and 3 is for the average house. the guy said 6 is setting for REALLY bad condensation. im going to up ours to 4 tonight (as its a reasonably large house) and see what happens. however there are a few reasons im not concerned yet: 1. it has only been a week or so, they reckon 3 weeks or more before you start to notice the full benefits. 2. the top of the roman blinds are fixed against the wall at the top, in other words there is no room for "hrv" air to drop down behind them. i need to remount them out from the wall to make a gap for the hrv air, i think this should make a difference. the areas where there are no curtains yet (kitchen, my office etc) there is no condensation at all. lastly, no carpet in the house yet so not sure what a difference that will make. so far all good though.
definately the ventilation! you can seriously taste the difference. the "heating" side of things only lasts as long as you have warm air in the ceiling cavity. it definately makes a difference late arvo/early evening though, usually fireplace is on at 5pm, now we can wait til 7:30pm - 8pm. it basically keeps the house warmer longer, but definately not all night...
there is a tradeoff on cold nights. the humidity is definately much lower but because hrv is constantly "on" (its always blowing air from the ceiling into the house) this means that when the ceiling temp drops to, in our case, 12 at night and the house is at 20, its pumping 12 degree air into the house overnight (although very slowly). the side effect being that its just as cold as it was without hrv late at night - however, on the plus side it's a much more comfortable "cold" because of the lower humidity and extra ventilation. as i say, its a trade off - we still have oil heaters on in kids rooms at night but because of lower humidity and better ventilation, even with the kids having colds they have stopped coughing at night immediately after the system went in. i've found that if i put the oil heaters on too high, the kids start coughing again because it gets too dry. so having the oil heater on low just to take the chill out of the air, its a really comfortable sleep. you can seriously "taste" the difference, its kinda like sleeping with a dive mask on :lol:
will let you know my thoughts in another couple weeks time, all moisture should have been dispersed by then. not sure when we can afford carpet (got fish expenses you know ), but when we can i'll let you know the difference that makes