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% ...

Water is a byproduct of combustion. If the proper venting of flue gases is neglected — as is so often the case, unfortunately, in our industry — water in the form of condensation triggers serious ...

Q: We have a high-efficiency condensing furnace that vents out a side wall. Should I be concerned about the icicles I see built up on the plastic pipe outside the house? -M.C. Kalamazoo. A: No. What ...

I recently looked at a house that has a brick chimney with mineral deposits on its exterior, apparently the result of moisture condensation inside the chimney. This problem is not uncommon, and may ...

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.

I'm going to guess that you have a newer furnace. If that's true, you're probably getting condensation in the flue. Older furnaces didn't have that issue. The hot flue gas they produced literally shot ...

Since this is the start of the heating season, here are my eight top safety tips and suggestions for performing your own furnace and fireplace inspections. 1. If the fossil-fueled furnace is more than ...