BobD777
Member
I'm installing an AO Smith HPTU-80N hybrid hot water heater and am looking at the pros and cons of adding a thermostatic mixing valve. I see it's recommended for other types of installations, but is there anything that makes using it with a hybrid different?
Also, if I understand correctly, the mixing valve can potentially provide a whole lot more hot water with a smaller tank--given a higher set temperature. We currently have an 80 gal HWH. Is it more efficient to have an 80 gal HWH running at 120 degrees or a 66 gallon at 140 degrees with a thermostatic valve, and is it reasonable to consider downsizing, despite having a big house with currently 5 living here?
And FYI, I know some of you don't like the hybrids. I've got excess solar pv that will handle the load, a really large, unconditioned basement, and need for dehumidification.
Thanks for your input--
Also, if I understand correctly, the mixing valve can potentially provide a whole lot more hot water with a smaller tank--given a higher set temperature. We currently have an 80 gal HWH. Is it more efficient to have an 80 gal HWH running at 120 degrees or a 66 gallon at 140 degrees with a thermostatic valve, and is it reasonable to consider downsizing, despite having a big house with currently 5 living here?
And FYI, I know some of you don't like the hybrids. I've got excess solar pv that will handle the load, a really large, unconditioned basement, and need for dehumidification.
Thanks for your input--