Quote:
Originally Posted by yads
Humidifiers are dead simple to install after the fact. Tankless water heaters are much harder. I'd upgrade the latter, but not the former.
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The other thing with tankless water heaters, is that if you also have a high efficiency furnace, your house may not need a vertical chimney at all, and whatever space goes up through the main floor and second floor for the chimney could be reclaimed into regular rooms, and that makes the spaces more flexible.
High efficiency furnaces and tankless water heaters can both exhaust out the side wall.