You might remember the days when a boiler tune-up mostly meant adjusting the flame. The flame was supposed to be solid blue with the tips slightly rounded. If the flame was soft, wavy and contained ...

Rotary engines differ from conventional ones in many respects — and one of them is the fact that they use two different spark ...

[Editor's note: This is part four of a five-part series.] Before you test any equipment at an existing installation, before you even perform a clean and check or other maintenance, you need to check ...

The combustion analyzer has become a modern mystery to most service technicians. Let's face it; there isn't a lot of information available on performing a combustion analysis on residential heating ...