Most noncondensing residential furnaces use natural draft to drive the combustion process. Even 80%-AFUE furnaces with combustion blowers are natural-draft furnaces. The combustion blower in an 80% ...

Q: We had a new high efficiency furnace installed two years ago and they stuck the vent out of the wall close to the furnace. In the winter the pipe freezes and we have to go out and knock the ice off ...

QDEAR BARRY: We're buying a 12-year-old house and there is a difference of opinion between our home inspector and a heating contractor. Our inspector checked the forced-air furnace for carbon monoxide ...

My house is heated with a gas-fired furnace. How can I seal the house's ducts to prevent carbon monoxide (CO) leakage? First, let's clarify this. Ducts carry heated or cooled air. Under normal ...

Q. We purchased a home that was built in the 1960s. The forced air furnace is new, but the metal flue pipe from the furnace is connected to the original concrete flue pipe that extends up through the ...

It's perfectly acceptable to have a high-efficiency furnace installed with one pipe. Just flip through the pages of any high-efficiency furnace installation manual and you'll find the answer. I'm ...

Skipping the manufacturer's instructions during installation may result in a furnace that fails within six months or less. For example, heat exchangers can crack from improper venting, and gas valves ...

Q. We had a chimney cleaning service inspect our chimney and they suggested that we install an insulated flexible aluminum flue liner in our chimney connected directly to our gas water heater vent.