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I need a new furnace, but know very little about the types of furnaces available. What is the difference between single stage, two stage and variable
Answer: Traditional single-stage furnaces are designed to heat your home during the absolute coldest weather in your geographic area. Therefore, they run at their fullest capacity whenever they are in

What is a Gas Furnace
The Gas Furnace is an appliance looking like a large box that does the following: takes in cold air, cleans it with an air filter, heats it up with a gas burner using a stainless steel heat exc

How do I select the right Gas Furnace?
Furnace Heat Input/Output and Efficiency The amount of heat energy generated by a furnace is calculated in British thermal units, or BTUs. Furnaces run at different levels of efficiency, which

What is AFUE?
An acronym standing for "Annual Fuel Utilization Efficiency". A measure of a gas furnace's efficiency in converting fuel to energy - the higher the rating, the more efficient the unit. Also Known As: