Two-speed burner and/or multi-speed blower...
How much influence do these two technologies have on a furnace's operation?
2 speed burner? Or maybe 2 stage or modulating. Answer is;
Better comfort and efficiency.
Proud supporter of Springfield Millers and Oregon Ducks.
2 stage is better comfort, but I'd get a VS blower instead of the multispeed.
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How many times must one fix something before it is fixed?