Q. With the deep winter snow we had last season, the air intake for our furnace plugged up. I had to separate the pipe from the furnace and let already-heated house air be used in the furnace rather ...

Combustion analysis is all about location. Key measurements are taken in the flue gas after the heat exchanger and prior to any dilution air entering the flue. Typically, the ideal location to measure ...

If you trace this duct down, you'll find that it connects to an opening at the exterior of the building. This is essentially just a hole in the side of the building that brings in fresh outdoor air.