I am looking for a whole house ventilation system for an existing house in the UK.
Heat recovery ventilation sounds good but the conventional installation is impractical because of the need to install ducts to supply air to all habitable rooms.
Positive input ventilation seems easier as it uses just one supply vent, at the top of the house and then relies on air pressure to push the stale air out. However, my husband worries that we might be taking cold air from the loft and pushing it around the house, making the house even colder.
I came across the idea of an anti-stratification duct (see Brett Salter, Mountain bungalow) and wondered if it might be possible to combine this with heat recovery, i.e. have a central extraction and heat recovery unit in the loft drawing air from the wet rooms, then pumping the warm, fresh, filtered air down the house via just one duct coming out at the bottom of the house.
This warm air would then naturally rise up again, bringing fresh air to the whole house.
Does this sound like a viable solution?
Edited 8/4/2009 10:29 am ET by philippar
Replies
Greetings phil,
This post, in response to your question, will bump the thread through the 'recent discussion' listing again which will increase it's viewing.
Perhaps it will catch someone's attention that can help you with advice.
Cheers
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Let's run this through again.
bump
Well I don't know about your specific situation but we have an ERV bringing about 135 CFM into a central area of the house and it works great, especially in the wintertime.
Jeff
Questions in your other post are unanswered. We need to better understand what you are trying to accomplish. Ventilation is one thing. Destratification is another. What it the problem you are trying to resolve? Your post is a bit confusing. What are you trying to achieve?
Having positive pressure ventilation may not be a good thing particularly in the UK. Positive pressure venting is going to force moist inside air into the construction (not a good thing). Most the time we use negative pressure venting (i.e. exhaust fans combined w/ various strategies to let the fresh air in (e.g. cracking open a window, window vents, natural air leakage of the construction if you have a leaky house, a fresh air damper interlocked w/ the furnace fan/exhaust fans, etc.
If you have high moisture levels in the house, positive pressure venting should not be used.