ProHeat pressure cap?

[Nick Badame Refrig/ACC]

Hi,
If I want to add the capabillity of heating water with a Proheat system what is the best way of doing it?
Thanks
Rich

A friend of mine bought a new 12 gallon or so electric water heater from Home Depot, stripped the outer cover and insulation off to reveal the tank, and then wrapped about 100 ft of soft 1/2" copper tube around the tank. The copper tube was connected it to the heating system, and so by circulating the heating system liquid through the copper tube coils on the water tank, he can heat domestic water in the tank.
Seems to work well for him and his wife.

AquaHot does something similar, but in reverse. They have a 12 gallon coolant reservoir. There is 130 ft of copper wrapped around the
reservoir, which produces continuous domestic hot water. Works well for my family of 4.

Wow,
The ultimate would be to wrap copper tubing around the exhaust of the proheat/aquahots to preheat water...
Nick-

[donnreeves]

Charly,
I have to disagree with putting the flat plate heat exchanger before the hot water tank. I did that and it didn't work. It was pointed out to me, while I was at Bruce Knee's gathering, that I had it backwards. The heat exchanger should go after the hot water tank. So I went home and changed it,and now within two minutes of firing the Pro-Heat up from cold, I have continuos 137* hot water. My water heater is a marine unit with a small heat exchanger inside and an electric element. The reason I first installed the flatplate heat exchanger was because the one in the tank is so small it took 2 hours to make hot water with the PH running. The reason the flat plate exchanger is not effective before the HWH is that you must be flowing water through it for it to work,and you never run the HW long enough for it to heat the water in the hot water tank. If I were to do it again,I would  put in a small electric WH and the flat plate on the outlet side.   Donn

[captain ron]

Charly,
I have to disagree with putting the flat plate heat exchanger before the hot water tank. I did that and it didn't work. It was pointed out to me, while I was at Bruce Knee's gathering, that I had it backwards. The heat exchanger should go after the hot water tank. So I went home and changed it,and now within two minutes of firing the Pro-Heat up from cold, I have continuos 137* hot water. My water heater is a marine unit with a small heat exchanger inside and an electric element. The reason I first installed the flatplate heat exchanger was because the one in the tank is so small it took 2 hours to make hot water with the PH running. The reason the flat plate exchanger is not effective before the HWH is that you must be flowing water through it for it to work,and you never run the HW long enough for it to heat the water in the hot water tank. If I were to do it again,I would  put in a small electric WH and the flat plate on the outlet side.   Donn

I'll give you that one, I was just thinking pumping already hot water into my hot water tank would give it a head start. I have the same type of hot water tank as you, marine hydronic/electric.