Hi all, I’m installing an ERV in the next little while and I’m thinking of using an old oil furnace (no longer existing – the chimney is capped on the inside) chimney for the exhaust duct. I wouldn’t use it as an intake since it’s right beside a wood fire chimney that is occasionally used. The intake will go to a  wall where I predict has the best air quality.

Any issues with this idea? Would condensation building on the liner be an issue?