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Ah, that's interesting. I didn't even consider that. I think with the addition of 2x6 planks on the sides, I should be okay. It'll probably look better, too!
Thanks! I am totally fine adding the 2x6s, in fact I'm pretty sure the installation instructions for the door tell you to do this. I'll be thrilled to finally replace the existing door.
It's an outdoor tankless heater, so it's designed specifically to mount outside. It's a shame the manufacturer didn't make the mounting bracket 1" longer and put it on 16" centers!
@GeorgeAnderson The heater will vent directly to the outside, as the exhaust outlet is on the front. There needs to be 12" of space between the vent and an open window.
