Hot Water Heater for an Energy-Efficient Home
What is the best kind of hot water heater for a highly efficient home? Only 2 people, CZ 6. I was thinking about a combi boiler to do radiant, but we’ve scaled radiant back to just 5000 BTU in the garage, so that’s probably not worth it if I have to pay $5k+ for a combi boiler. I see DHW solutions from $800 to $7000 and I don’t understand the difference. The usage for an reasonable efficiency gas water heater is about $150 per year, so efficiency isn’t that critical. We have NG available and it is super cheap.
I should probably add… My conditioned crawlspace is where my mech room is supposed to be, but it is only 4.5′ deep due to potential seasonal groundwater issues. So for a taller one (which all are except on-demand and combi-boiler) I would have to put it in the adjacent garage. I also want a recirc pump.
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