First thing to know is that it is okay to go between your air conditioner and your furnace to keep your home at your desired temperature. Ernst Heating and Cooling says going between the two systems ...

A: With a high-efficiency furnace, the fan you hear running is a draft-inducer fan designed to force the fumes from the burners out through a PVC (polyvinyl chloride) flue pipe.

How important is airflow across an evaporator in a properly operating air conditioning system? If you ask a wide range of technicians you are likely to get many different answers, but the general ...

From Joe Ponessa, professor emeritus at Rutgers University and building-science consultant: If the chimney also contains the flue for a furnace or boiler, the other possible source of the water is ...

Our inspector checked the forced-air furnace for carbon monoxide. He inserted a probe into the flue pipe and said the meter went off the scale. He thinks the furnace is unsafe.