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Thread: Energy efficiency of waterheater
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06-25-2008, 09:15 PM #1
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Energy efficiency of waterheater
Ruud
Model: RG50-50CM
Serial: 0791J97815
Capacity: 50 US Gallons
50,000 BTU
Recovery - 42 (?)
Installed - 1991
What's the energy factor of this old gas waterheater? Were waterheaters even rated in the early 90s?
I'm curious to know if today's natural draft models are significantly more efficient than what I have. I looked at the specs of new models and they're all piss poor - ranging from 0.58 to 0.60.
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06-25-2008, 10:02 PM #2
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prolly about a .56 based on the age.
Whirlpool has a .65 ef gas water heater. Lowes carries it.
Good water heater.
Tankless gas units ( I like to put them on exterior wall and not have to buy the venting and cut a hole in the roof) achieve up to .82 energy factor, and it seems like I have seen a couple that were .85
best of luck.The cure of the part should not be attempted without the cure of the whole. ~Plato
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06-26-2008, 09:53 AM #3
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Here is a site with lots of ratings and other good info:
http://www.gamanet.org/gama/inforeso...ct+Directories
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06-26-2008, 09:12 PM #4
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thanks mchild...I forgot to include the gamma site.
The cure of the part should not be attempted without the cure of the whole. ~Plato
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06-27-2008, 10:03 AM #5
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Thanks - I think GAMA only lists current products online.
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