Outside air kit?
I recently had a Harmon P 61 installed in my basement. My house was built in 1984 but I just recently had my rim joist air sealed with spray foam and my attic air sealed/blown in insulation installed.
Should I invest in an outside air kit (OAK) or will it probably run fine without it? Pros? Cons? TYIA!
u/Necessary_Ad2251 — 12 days ago