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Dry vs Wet Returns, Boiler Efficiency.
I'm replacing my boiler on a 1-pipe, wet return system. Is a dry return more efficient than a wet? Another engineer that I work with claims a dry return delivers the condensate back to the boiler at a much higher temperature, so the boiler doesn't have to waste as much energy to reheat the condensate. (His experiance is with large high pressure commercial steam, I don't know how well this translates to my dinky 120,000 btu low pressure gas boiler)
I notice my wet return does get much cooler closer to the boiler. Would the savings be worth the cost to convert to a dry return? My wet return is a 1 1/4" copper replacement done about 10years ago and I flush it yearly.
Would insulating the wet return help? Just thinking outloud.