I'm all against gas, but you also can't assume your energy, if driven by fossil fuels, will get clean enough over the (most likely) 10-15 year lifespan of the water heater, either. It's all a balancing and conditions game.
Okay well then it won't matter because I can guarantee you that US electricity won't have absndoned fossil fuels in every part of the US by then.
But if your electricity comes from a big old oil-burning plant (or most coal plants), an efficient gas system will objectively be better in terms of GHG emissions, as they run those suckers 24/7 even when demand is low.
I'm all against gas, but you also can't assume your energy, if driven by fossil fuels, will get clean enough over the (most likely) 10-15 year lifespan of the water heater, either. It's all a balancing and conditions game.
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Okay well then it won't matter because I can guarantee you that US electricity won't have absndoned fossil fuels in every part of the US by then.
But if your electricity comes from a big old oil-burning plant (or most coal plants), an efficient gas system will objectively be better in terms of GHG emissions, as they run those suckers 24/7 even when demand is low.