Solar hot water and electric tankless

Heynow999 · 02-19-10, 06:54 PM

I have compared the two different types of heat exchangers, external flat plate VS internal coil. I know that on my system they glycol will only drop about 4C after it goes through the heat exchanger. I have two thermometers on the pump station. A friend of mine has an external heat exchanger and he sees a huge drop in temperature when the glcoy goes through it. I don't remember any numbers and I know this is not scientific evidence but I remember being really surprised when he told me the numbers

The other thing I would do different next time is I would make a drainback system so I could use water as a heat transfer fluid. Water is better (and cheaper!) than glycol. I am tired of wiping glycol off the wall.

02-19-10, 06:54 PM	#4
Heynow999 Lurking Renovator Join Date: Feb 2010 Location: Toronto Posts: 16 Thanks: 0 Thanked 0 Times in 0 Posts	I have compared the two different types of heat exchangers, external flat plate VS internal coil. I know that on my system they glycol will only drop about 4C after it goes through the heat exchanger. I have two thermometers on the pump station. A friend of mine has an external heat exchanger and he sees a huge drop in temperature when the glcoy goes through it. I don't remember any numbers and I know this is not scientific evidence but I remember being really surprised when he told me the numbers The other thing I would do different next time is I would make a drainback system so I could use water as a heat transfer fluid. Water is better (and cheaper!) than glycol. I am tired of wiping glycol off the wall. Last edited by Heynow999; 02-20-10 at 06:02 AM..