1. ## Propane heater question

My basic question is how expensive will it be to heat my pool. Considering purchasing a new heater to replace to currently broken one unit. I open in mid May but usually don't get in until mid June. Close in mid October but rarely get in after school starts early September. The wife wants to get in early May and heat it up for the occasional pool party. It averages about 82 degrees mid summer months. I would like to heat it up to about 85-88 on cooler days. The plan is to get a raypak 406,000 propane heater. I'm confused about calculating how much propane it would use and would the existing propane tank which is 100 gallons be big enough or will I be refilling often. If any out there has the raypak, I would love some feedback on it or any other recommendation would be appreciated. Propane price in my area right now is 2.99/gallon.

2. ## Re: Propane heater question

It will cost you \$10 per degree of heat you want to add to your pool.

(this is for on-demand heating to bump up the temp. To keep it there for any length of time is a different thing)

CALCULATIONS:
To heat your pool 1 degree F:

33,000 gal = 264,000 pounds of water

To heat that 1 degree takes 264,000 BTUs

There's 100,000 BTU in 1.1 gallons of propane.

It will take 2.64 gallons of propane. That's about \$8. Factoring in inefficiencies of transferring that heat to your pool, call it \$10.

3. ## Re: Propane heater question

A 400k heater like yours will burn 4.4 gallons of propane per hour, every hour the heater is on. Based on your cost for propane that is about 13.50 an hour, every hour the heater is on.

Drawing that much gas off of a single 100 gallon tank would likely freeze the tank up in an hour or two depending the outdoor temp. So yes you could run a heater off that tank but it wouldn't work well and I wouldn't recommend it. You should have at least a 240gallon storage tank for that heater but the preferred setup would be dual 240's or a single 500gallon tank.

Propane is considerably more expensive on a monthly basis, when compared to natural gas or electric heat pumps. Personally I would never use propane to heat my pool, and I use propane for heat, hot water, cooking and my clothes dryer. My price per gallon of propane is around \$1.80.

4. ## Re: Propane heater question

A 400k heater like yours will burn 4.4 gallons of propane per hour, every hour the heater is on. Based on your cost for propane that is about 13.50 an hour, every hour the heater is on.

Drawing that much gas off of a single 100 gallon tank would likely freeze the tank up in an hour or two depending the outdoor temp. So yes you could run a heater off that tank but it wouldn't work well and I wouldn't recommend it. You should have at least a 240gallon storage tank for that heater but the preferred setup would be dual 240's or a single 500gallon tank.

Propane is considerably more expensive on a monthly basis, when compared to natural gas or electric heat pumps. Personally I would never use propane to heat my pool, and I use propane for heat, hot water, cooking and my clothes dryer. My price per gallon of propane is around \$1.80.
Thanks so much for the reply. It's going to tough to justify spending that much money on propane. May consider electric heat pump or solar.

5. ## Re: Propane heater question

A 400k heater like yours will burn 4.4 gallons of propane per hour, every hour the heater is on. Based on your cost for propane that is about 13.50 an hour, every hour the heater is on.

Drawing that much gas off of a single 100 gallon tank would likely freeze the tank up in an hour or two depending the outdoor temp. So yes you could run a heater off that tank but it wouldn't work well and I wouldn't recommend it. You should have at least a 240gallon storage tank for that heater but the preferred setup would be dual 240's or a single 500gallon tank.

Propane is considerably more expensive on a monthly basis, when compared to natural gas or electric heat pumps. Personally I would never use propane to heat my pool, and I use propane for heat, hot water, cooking and my clothes dryer. My price per gallon of propane is around \$1.80.
Thanks. Wondering now if it's even worth it or do I just buy a 400 dollar solar cover and call it a day

6. ## Re: Propane heater question

No matter what way you decide to go it's always recommended to get a solar cover if you heat your pool. You don't need an expensive one any ole cover that fits your pool will work.

7. ## Re: Propane heater question

You should be able to find a solar cover on amazon for just over a hundred dollars at that pool size.

8. ## Re: Propane heater question

Originally Posted by borjis
You should be able to find a solar cover on amazon for just over a hundred dollars at that pool size.
It's a lazy l shape which I haven't been able to find. But I'll check amazon

9. ## Re: Propane heater question

Buy an oversized cheap cover and cut it to fit. Also a lot of people find it easier to cover lazy l shaped pools with a cover cut into two large pieces that overlap.