HOW IT WORKS - 2 STAGE FURNACE
A Two Stage Furnace's programming differs from that of the single stage unit. On moderately cold days, the furnace will only use the first stage of heating and will run continuously for its entire heating cycle rather than giving off blast of air to rise indoor temperatures until the thermostat is satisfied.
The efficiency is due to the operation of the burners. A 2 stage furnace will only full fire when the indoor temperature drops during the cycle of the first stage.
This feature not only increases fuel efficiency but also has the added value of a more continuous and even airflow distribution throughout the home helping to eliminate cold spots and best of all is more cost efficient. This is achieved by long and slower heating cycles.
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HOW IT WORKS - MODULATING with Variable Speed
This furnace provides the highest level of efficiency and offers the ultimate in-home comfort. Efficiency and comfort are achieved by using a circuit board to fully manage adjustable fan speeds and burner firing. The fan speed fluctuates in accordance with temperature demand and has incremental settings.
Due to these settings, the room temperature never varies more than 1 or 2 degrees from the thermostat's target temperature. In contrast to a standard furnace, a modulating furnace only makes slight operating adjustment in order to achieve optimum efficiency and comfort. Since this type of furnace rarely reaches high fire, it consumes much less energy.
This unit also operates with finesse, and continual lower blower speed means you will not hear loud rushes of air blowing throughout your homes duct work.
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