The floor joists in my basement are partially in the foundation so my rim joists are half concrete half wood.
I need to cut a 6" hole for an exhaust outlet for a HRV.
There is an existing 3.25 x 10. rectangle vent.
Can I just put a 3.25 x 10 x 6 angle boot and get the equivalent air flow?
I need to cut a 6" hole for an exhaust outlet for a HRV.
There is an existing 3.25 x 10. rectangle vent.
Can I just put a 3.25 x 10 x 6 angle boot and get the equivalent air flow?