HVR retrofit into a townhome hvac system
I have a townhome that I’d like to retrofit an HRV into. The furnace room is interior without any exterior facing walls and it’s unlikely I’d be able to get the association to allow me to run ducting to exterior walls or roof to provide an inlet and outlet for air. The townhome is 2 story with a bathroom on each floor and each bathroom has an exhaust fan that runs out through the roof. My idea is to splice the exhaust lines in each bathroom and make one roof vent an intake and the other the exhaust. I’d use existing exhaust fans in bathrooms to become the piping to run through the HRV and out one of the bathroom roof vents as exhaust air and I’d use the other roof vent for fresh intake to go through HRV and then into furnace ductwork.
What are your initial thoughts on this?
if I used insulated ductwork (cold Minnesota weather) would I have any issues with condensation inside of the ductwork dripping back down into the HRV and causing problems? What would be a solution to this problem?
Are there any obvious code violations with a setup like this?
Thanks for your help.
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