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Forum: Geothermal & Heat Pumps

12-15-14, 09:55 AM

Replies: 37

Anybody ever build a natural gas heat pump?

Views: 26,560

Posted By gtojohn

Usually direct vent means it exhaust vents into...

Usually direct vent means it exhaust vents into the living space, as in there's no flue. They sometimes say its 100% efficient because there's no loss out the flue. Of course you are also getting...

Forum: Geothermal & Heat Pumps

12-14-14, 10:51 PM

Replies: 37

Anybody ever build a natural gas heat pump?

Views: 26,560

Posted By gtojohn

Generally the name plate ratings show input btu...

Generally the name plate ratings show input btu and output btu to derive the efficiency. I am curious about under what conditions and runtimes they do their tests. The usual testimony for 96%...

Forum: Geothermal & Heat Pumps

12-14-14, 10:10 PM

Replies: 37

Anybody ever build a natural gas heat pump?

Views: 26,560

Posted By gtojohn

With 96% efficient natural gas furnaces I don't...

With 96% efficient natural gas furnaces I don't see there being much room for improvement for the complexity of running an engine to drive a compressor for the heat pump cycle. Gas furnaces are...

Showing results 1 to 3 of 3

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