I wish you got some good feedback on your question, I was looking for same
info. I have a Bradford White installed by my builder, its too small and I
need to upgrade. I am thinking of going to an on-demand tankless system,
govt is offering a $300 tax credit for installing these engergy saving
devices. When you are looking for 75gal type HW heaters then this seems to
be cost effective. Replacing a 40 gal you have a much higher initial cost
for the tankless and a longer payback. If you are needing TWO 40 gals to
service your home then you may be in the same boat as me. There are tankless
heater that will keep up with your demand. They will cost ~$800-$1500 as far
as I can tell, I am still doing research. I am looking at Takagi, Remi,
Bosch and others.
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