Do CO2 (R-744) HPWHs pencil out in very cold garages versus indoor installations?

[reno_questions]

Do CO2 (R-744) HPWHs pencil out in very cold garages versus indoor installations?

[Tim_Michael1]

PEX works better inside the house where it’s warm. But if you put it in a cold garage, you need to wrap it up with insulation so it doesn’t freeze.

[Tim_curtis]

I definitely agree with that

It needs to be properly insulated to avoid freezing