3 ms·
AFAIK with gas furnaces the air touching the flame never touches the air that goes into the house, they run them past each other on top of a thin filter to exch
by symlinkk 4y ago
AFAIK with gas furnaces the air touching the flame never touches the air that goes into the house, they run them past each other on top of a thin filter to exchange heat. So the CO2 produced from the flame should not affect CO2 in the house, provided the system is not malfunctioning.