The primary benefit is using less electricity.
For a water volume of around 700 gallons, I would need probably 600 - 800 watts of electric heat. I've read articles that suggest heaters should be replaced every couple of years.
We also have a hot water solar system that sometimes produces excess heat, so it makes sense to dump the excess heat somewhere useful.
And...
-Saves space on the Profilux power bar
-Don't need to run as many electrical circuits
It may not make sense for smaller tanks, but I think it's a great idea for larger ones.
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Mitch
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