I have a heat pump hot water heater, and it's been awesome. It's ROI has definitely improved with all the energy price spikes. It's located in my garage (I live in Florida) so there's no shortage of hot air for it to use.

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ProllyInfamous an hour ago | parent | next [-]

>>Florida>> "no shortage of hot air"

hot HUMID air – which heatpumps love!

Draw your inlet from [at least one] humid bathroom source, if you can. Always use insulated ducting to lessen local condensation.

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I always smile knowing that using hot water doesn't cost any more than cold, at least when the AC would otherwise be cooling (offset).

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ProllyInfamous 4 hours ago | parent | prev [-]

Same — I maintain four (one RHEEM and three AO's).

The AO is a much cleaner/simpler/nicer install. The Rheem stupidly requires duct adapters (for small-space, <700sqft "closet" installations). AO won't last as long, but at $250 who cares?!

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fsckboy 2 hours ago | parent [-]

>at $250

after subsidy

>who cares?!

fellow taxpayers, fellow ratepayers, people who care about the planet, etc. etc.

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ProllyInfamous 2 hours ago | parent [-]

>fellow ratepayers

This reduces electric infrastructure demand, which is why it's subsidized. Presumably, this saves money (duh) for the company (duh) and possibly the customers (presumable duh). Presumably people who care about the planet understand this.

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Running a single heatpump waterheater is the equivalent of not driving your car, annually, according to TVA (in carbon footprint).

I'm running four [two households, ten people]. What's your question?

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edit/tone (educatable moments): <https://www.hotwater.com/water-heater-rebates/tva-heat-pump-...>

	▲	phil21 15 minutes ago \| parent \| next [-]
		> This reduces electric infrastructure demand, which is why it's subsidized. Presumably, this saves money Short term gain, long term pain. The story of our entire electrical infrastructure the past couple generations. Why invest in capital infrastructure like generation or transmission capacity when you can simply reduce peak demand via stuff like this. Eventually you run out of cheap tricks and need to actually build things. We are roughly at that inflection point now - brought forward maybe half a decade or so by datacenter demand. We had it really damn good the past 30-40 years due to investments in all area of the grid our grandparents and great grandparents paid for. Then we decided it was cheaper to let a lot of that stuff age out and deteriorate vs. replacing it via efficiency gains and de-industrialization. We reap what we sow. It was obvious electrical demand was going to increase at some point, and we have run out of the cheap parlor tricks of the past couple decades while we let everything else decay around us. It's been incredibly frustrating to watch since I was a teenager 30 years ago and figured out why electric companies would pay someone to use less power against the obvious incentives. It's so they didn't have to do their jobs - just sit on capital equipment others paid for and collect rent.
	▲	laurencerowe 39 minutes ago \| parent \| prev [-]
		> Running a single heatpump waterheater is the equivalent of not driving your car, annually, according to TVA (in carbon footprint). This seems a lot but for utilities which still have coal plants it seems accurate if the reduced demand allows them to close the coal plant down. A typical car emits 4.6 tonnes CO2 per year. https://www.epa.gov/greenvehicles/greenhouse-gas-emissions-t... Heat pump saves around 3,760 kWh per year. https://www.energystar.gov/products/heat_pump_water_heaters/... Coal emits 1.02 tonne CO2/MWh = 3.8 tonnes CO2 per year savings from the heat pump. Natural gas emits 0.44 tonne CO2/MWh = 1.65 tonne CO2. https://www.eia.gov/todayinenergy/detail.php?id=48296 That's a pretty substantial saving which will kick in when the next administration reverses Trump's absurd orders to keep existing coal plants open.