4 ms·
Modern gas furnaces use the outside atmosphere for combustion. It helps get them high (for gas) efficiency levels! https://www.youtube.com/watch?v=lBVvnDfW2Xo
by CaliforniaKarl 4y ago
Modern gas furnaces use the outside atmosphere for combustion. It helps get them high (for gas) efficiency levels!
https://www.youtube.com/watch?v=lBVvnDfW2Xo https://www.youtube.com/watch?v=lBVvnDfW2Xo