High efficiency boiler?

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Montana2424

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Feb 11, 2021
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We have an NTI high efficiency boiler we use for radiant floor heat. Is it more efficient/better to set the boiler at 120 degrees to warm the house for a longer period of time OR is it better to set it at 150 degrees for shorter period of time?
 
The longer the boiler runs the more effeciant. You want it to run as low as possible for a long as possible.
 

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