How do you calculate Water Heater Recovery Efficiency?
I am having trouble calculating water heater recovery efficiency.
Specifically, I do not know how to calculate or determine RE for a 90 or 95% Thermal Efficiency gas storage tank water heater, examples Vertex 100k unit or State GP 650 76k or 100k unit.
Since these units are over 75k BTU input, they are classified as commercial water heaters, do not have energy factors specified by law, and I am now simply trying to learn how to calculate their recovery efficiency RE.
Any help would be greatly appreciated.
Posted Nov 5, 2011 5:23 PM ET
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