Pre-heat water for hydronic baseboard

mhixson · 09-28-21, 11:28 AM

My house has a propane heated hydronic baseboard system. Our propane prices fluctuate while our electricity costs are fairly constant. I'm wondering about getting a tankless electric water heater to pre-heat the water going into the hydronic system. My reasoning is that it requires more propane to heat 50F city water to boiling than it would to take 120F to boiling coming from the tankless heater.
Has anyone done this sort of thing before and did you see significant savings in propane costs?
Thanks!

09-28-21, 11:28 AM	#1
mhixson Lurking Renovator Join Date: Jul 2011 Location: Washington State Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts	Pre-heat water for hydronic baseboard My house has a propane heated hydronic baseboard system. Our propane prices fluctuate while our electricity costs are fairly constant. I'm wondering about getting a tankless electric water heater to pre-heat the water going into the hydronic system. My reasoning is that it requires more propane to heat 50F city water to boiling than it would to take 120F to boiling coming from the tankless heater. Has anyone done this sort of thing before and did you see significant savings in propane costs? Thanks!