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[email protected] nicksanspam@ece.villanova.edu is offline
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Default Natural gas space heaters

sylvan butler wrote:

If the $1275 DV-20E 81.5%-efficient direct vent and $3268 93%-efficient
Mantis condensing gas heaters are measured with LHV-based efficiencies
and we subtract 11% to compare apples to apples, the $229 vent-free
heater is more efficient, as well as a lot cheaper.


The 93% and 81.5% already account for the 11% loss in non-condensing.


I finally heard from the manufacturer, who tested all of them with gas
with a heating value of 1035 vs 930 Btu/ft^3, ie the HHV.

Nick