Quote:
Originally Posted by Servicetech
How much does cycling losses of a gas furnace reduce... Thermal Efficiency?
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One way you could approach this would be to compare modulating gas furnace efficiency to non-modulating gas furnace efficiency, since the modulating feature is designed to overcome the cycling losses.
You'd need to be careful in selecting similar units for your comparison. For instance, a lot of the modulating units are also condensing units, which also adds to the efficiency.
I know that with regards to mini-splits, the modulating units (AKA: "inverter technology") made a significant jump in efficiency.
You might also look into modulating gas water heaters and also modulating gas hydronic boilers.
I'd be very interested to see what you find out.
-AC