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Forums > Green Building Technologies > Radiant Heating > Subject: Boiler vs Hot water tank?

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DaveeUser is Offline
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Posts:25
05/11/2005 8:15 PM  
Anyone help with comparison of efficiencies. Are the AFUE tests different on a tank Vs a boiler? A tank normally sees more cold water than a boiler so getting higher efficiency on a test should be easier in a hot water tank but lower in a radiant heat situation
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05/28/2005 4:34 AM  
Hot water tanks under 200,000 btu's are not require to have an AFUE rating. That leaves you to try and compare EnerStar ratings for these products. A typical tankless has a combustion efficiency of 82% compared to a standard boiler of 85%. Not much difference really. The tankless is well suited to a combined installation DHW and space heating where the DHW load is larger than the space heating load. If this is not the case (as in a basement floor warming system) and you want to heat a whole house, buy a boiler.
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Forums > Green Building Technologies > Radiant Heating > Boiler vs Hot water tank?


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