Isnt a pool heater a tankless water heater.....?
^^^^^ This guy gets it!
Isnt a pool heater a tankless water heater.....?
This is like asking "Can I put a space heater in my HVAC ductwork and heat my house?"
Curious how much you spend a month heating the spa and how much you use it? I'm also having a spa installed that is 7x7 with 6 jets and a 400k btu heater. I was estimating $10 per day to operate 5-6 hours, but was pulling that number from my behind.
To get an accurate idea of cost to run the heater, get your last gas bill out and look at the number of therms you used and the total bill cost. Simple math will get you the cost per therm. Your 400,000 BTU heater uses 4 therms per hour.
Are you saying you are not going to run pool water through the heater? And just going to run fresh water through the heater into the pool. This is not going to work very well for a variety of reasons.I will give a try on my own pool, down to SoCal area, we've been thinking the same idea for pool heating since we are limited from changing gasline pipe size. if it does not work for the pool( 22,000Galon) I would just use it to upgrade my residence old tank heater.
I would just run the hot water straight to my pool from the heater, so it doesn't cause any trouble to the pump flow rate. if water level gets to high, I will just use backwash to discharge some water,( also do my backwash), it doesn't cause that much money now days for the tankless heater, so it will be interesting to see, if it's working or not. I will keep you guys posted.
Matt has a very good idea here, check it out most utilities localities go this way now.If you can’t change pipe size, then can you run at higher gas pressure?