Now, a modulating furnace is also called a multi-stage furnace. Instead of just having two stages of efficiency, it will have many stages that will vary depending on the demand and comfort desired in the home. Its is like having 'cruise control' on your furnace. Why run it at 100% capacity, when only 50 or 60% is required to maintain the comfort of your home. Most modulating furnaces and some two-stage models also have a 'variable speed' fan, which will also enhance the high efficiency of the unit. Variable speed fans, do not use as much electricity as a single speed fan, which is either on, or off. Variable speed fans ramp up slower and then when your house reaches the desired temperature the blower fan will ramp back down. This provides more even heating of your home, quieter operation, and substantial savings on your utilities. Modulating refers to the gas valve and how much gas is consumed, whereas variable speed fans refer to the amount of electricity used to deliver the warm air.
It is true that this technology costs more up front, but with the month to month savings, and the wonderful comfort achieved, it is well worth the investment. Besides the fact that your equipment will last longer because it is not working so hard to produce your desired comfort level. Check our website at www.greensheating.com.