Dan, I don't know much, but share a somewhat recent experience.

We had our water heater replaced by a plumber that we trust, and I thought it would be a good idea to go tankless. He doesn't like tankless here in NH, because the incoming cold water temps are so cold that the units don't hit anywhere near the efficiency that they do in warmer climates.

If there is some truth to that, Ottawa's climate should prove more a factor than NH's.

Last edited by MarkSJohnson; 01/20/11 12:19 AM.
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::