How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Phil Your Own Question
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
23932409
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

I have 2200 sf of living space I want to heat especially

Customer Question

I have 2200 sf of living space I want to heat especially during winter. It gets down to -10 degrees. I already have hydronic heating via gas boiler installed but reluctant to turn it on due to the extremely high cost of propane. I would like to go solar. Can someone evaluate the lowest cost option to to run the hydronic heating using solar? I have looked into vaccum tube collectors which sound great since the cold doesn't affect it as much as normal solar heat collectors. Or do I go PV and install an electric boiler?
Submitted: 8 months ago.
Category: HVAC
Expert:  Rick replied 8 months ago.

No form of active solar (PV or hot water)is cost effective for space heating. In fact the install costs to heat a space that size could easily run to $50k. Passive solar is cost effective but that's a matter of building design and is seldom doable in a retrofit particularly for a space that big. I'm sorry to be the bearer of bad news but we stopped even quoting solar space heating because no one was willing to pay the price. Solar is cost effective for heating DHW and for general household power usage but not space heating.