I'm preparing to add heat to my pool by adding a hotspot energy heat exchanger.
The heat exchanger will be located 200' away from the pool. I am planning on installing 3" line to the pool but looking at the cost of insulated pipe is extremely expensive.
200' of 3" pipe holds about 73 gallons of water. Assuming about a 60gpm flow rate that means the water in the heated pipe takes over a minute to reach the pool.
Now let's assume the average dirt temp of my ground is 55°. I'm really curious how much heat I'll lose.
Since underground rated insulated pipe seemed too expensive, I was thinking about putting the 3" pipe inside of a 5" pipe then at least the hot water line isn't touching wet cool dirt.
What do you guys think?