HRV retrofit for a basement
I live in North Vancouver, BC, marine zone 4/5 and am renovating an older home.
The basement was finished years ago as a suite, to about R30 so I am not interested in redoing it.
The problem is we don't have enough ventilation in some of the rooms due to the fact that it is mostly a direct vent gas fireplace heating it.
Cold air returns are virtually non existent.
I was thinking of installing an HRV to provide more ventilation.
The spaces in the basement are a bedroom, bathroom, laundry room, a kitchen/living area and a separate family room.
The suite is about 600 sq ft and the family room about 300 sq ft.
The HRV would be installed in the furnace room which is centrally located.
I can get fresh air and exhaust stale air without too much difficulty to the HRV.
The family room and bathroom are the easiest as they are right beside the furnace room.
The kitchen won't be too difficult either.
The laundry room is the most problematic has it can become humid and is separated by stairs from the furnace room.
The bedroom is also separated by the stairs.
I am somewhat constrained by the fact that all ducts would have to run through the ceiling joists.
However, I may not have enough space in the ceiling joists to provide supply AND exhaust lines to each room.
It may also be difficult to provide enough distance between the exhaust and supply vents in each room.
While trying to maintain a balanced system, if I have to choose, is it better to provide fresh air or exhaust stale air from a room?
PS. I am also renovating the main floor so I have the ability to access the space in the ceiling joists in some rooms by opening the subfloor on the main floor.
And to throw a screw into the works, I would also like to use the HRV for the main floor.
However I am not as concerned because ventilation is supplied by the forced air furnace and cold air returns.
Posted Aug 24, 2014 6:48 PM ET
Edited Aug 25, 2014 9:46 AM ET
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