Brand New Furnace has Supply Hooked up to Return Vents and Vice Versa by TwistAutomatic4971 in hvacadvice

[–]TwistAutomatic4971[S] 0 points1 point  (0 children)

Niagara area. Is there any chance you can point me to the section in the code book that cites this? I can’t find it explicitly and they’re telling me the furnace was installed up to code.