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Mikesolar · 09-23-14, 06:29 AM

I do this with all my passive home installs. The simplistic method is to just have the circ pump run when there is a call for heat and have the boiler run on return water temp. That way it will come on less, or modulate down further, because the average water temp has been increased slightly.

09-23-14, 06:29 AM	#3
Mikesolar Master EcoRenovator Join Date: Aug 2012 Location: Toronto Posts: 958 Thanks: 40 Thanked 158 Times in 150 Posts	I do this with all my passive home installs. The simplistic method is to just have the circ pump run when there is a call for heat and have the boiler run on return water temp. That way it will come on less, or modulate down further, because the average water temp has been increased slightly.