Topic: https://russell.ballestrini.net/hybrid-hot-water-heater-saves-69-percent-on-energy-consumption/
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unverified 5y, 52d ago

What time frame was the 3375kWh for? You'd have to be paying $.30/kWh for that to be a year's worth of power for your water heater.

How much has the kWh/HDD for your space heating increased with the heat pump water heater?

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russell 5y, 52d ago [edited]

I use a Curb to get real-time energy usage.

The traditional unit showed on average a 45 minute recovery time at 4500-4900 watts, since this is less than an hour, I first multiply 4500 by .75 to get 3375 watts for an hour, finally I divide by 1000 to get the 3.375 kWhr.

The new system runs for 3 hours, using an average of 350 watts, so I first multiply by 3 which is 1050 before I divide by 1000 to get the 1.05 kWhr.

This is 69% decrease in consumption each time the system runs to recover.

The system runs to recover after showers, baths, and dishwasher. 3-6 times per day.

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unverified 5y, 52d ago

It's just a water heater, its not a hot water heater. Straight from A.O. Smiths description. "50 Gallon Voltex Residential Hybrid Electric Heat Pump Water Heater "

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russell 5y, 51d ago

While I agree with you, the title was written for SEO (search engine optimization).

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VHzR3tqn 2y, 163d ago

Hi - Thanks for the good info. We're in Eastern CT as well, near the shore. We run a dehimidifier pretty much all summer. Will the hybrid system really eliminate the need for it completely in a humid unfinished basement? Also, in winter, how cold did the basement get? We'll put it next to the boiler, and I'm guessing it takes all that heat out... Will it be freezing when we go down to do the laundrey?

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