How much benefit you will get from a newer high efficiency unit today. is questionable.
But, in hotter climates, and or areas with long cooling seasons. they may get some benefit.
Why is it that the new higher efficient units offer less of a benefit? It would seem that its just a matter of where you are putting the 'waste' heat... outside or into the water... obviously there is more to it than that... why?
I've worked on two of these made by ETech. I think they have been bought out by another company. Definitely makes the room colder but they work great, very little maintenance and tend to last long. The ones I know about are over 10 years old and still working.
They are noisy though.
"The American Republic will endure until the day Congress discovers it can bribe the public with the public's own money.
- Alexis de Toqueville, 1835
I've been thinking about this HPWH thing lately. To Jerryd, Rheem, Geyser and many others have HPWHs. The claim to fame of GE's hybrid design is that it's the first to get certified under new energy efficiency standards.
I've been wondering about the cooling problem this technology presents. Does anyone know how much the air temperatures changes from inlet to outlet? A regular family size unit for example.