Thread: 40 gal just not enough: Replacing water heater for 2400 sq home. Family of 2 adults + 2 children
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Wayne Whitney Wayne Whitney is offline
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Default 40 gal just not enough: Replacing water heater for 2400 sq home.Family of 2 adults + 2 children
On 2008-04-08, wrote:

again please post a link that says 20% go up the chimney........
please a link....... please........ all i see is someone stating it
must be....

Take a look at http://www.aceee.org/consumerguide/waterheating.htm,
in particular the life-cycle costs comparison. This shows a typical
gas tank water heater has an energy factor of 0.60, and a typical gas
tankless has an energy factor of 0.80. The difference of 20%
represents the standby losses. Prior computations suggest that of
those standby losses, 7% represents the loss through the tank
insulation, and 13% represents the loss through the gas flue.

Cheers, Wayne

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