Pool Heating

Paul Mitchell

Energykinetics.com They will send you some piping recommendations and even sell you the plate heat exchanger.

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Bill Riordan_3

Pool Heating

I am installing a pool this spring that will contain 20,000 Gallons of water. I was planning on installing a heat exchanger off the house boiler to heat the pool water. Can any one assist in sizing the exchanger and the required BTU output of the boiler.Any infomation both pro and con would be appreciated.

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George Peteya

Pool Heating

Bill, pool heaters are sized on pool surface area, not water volume. This is so because most of the heat loss from a pool is evaporation from its surface. One rule of thumb is 300 Btu per hour per square foot. By your volume, you probably have a 16'x32' if it's inground. So, 150,000 Btuh would be a rough estimate of boiler net output.

Ever consider solar? Pool heating is the most efficient, shortest payback type of solar heating there is.

kevin coppinger_4

well my opinion would....

to use pool heater/ heat exchanger like Tringe tub/phase3 and Weil-Mclain makes(maxi-flow) This has a better flow rate for the pool side to go through vs a flat plate could ever hope for. Another option would be thermaflow-everhot. I have used there pool hetaers before and have had great results.
According to W-M a 1*F/hr heat up rate would need 184,000 btu boiler output rate and use the WMPH-200 pool heater....kpc

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Roy_2

Pool Heaters

I agree with Kevin. I have done alot of pool and spa heaters using the Maxi-Flo from Triangle Tube. Give the guys a call they will size it up for you. Make sure you discuss the recovery rate. Most designs are for 2• rise per hour - pretty significant and a high demand on the btu's of the boiler. But if you are not looking to turn the pool into a lobster pot overnight you can get away with alot less. 1• rise will use 1/2 the btu's .....ect. You can size the heat exchanger for the existing boiler and the amount of btu's you want to commit to the pool and know how long it will take.
The biggest problem is the heat loss due to evaporation- wind is a large factor. In the calc if you have a 10 mph wind or greater you can't pump enough btu's to warm the pool. I have overcome this with a solar cover on the pool - cover the water and evaporation drops off to almost nothing. I have even used large sheets of bubble wrap floating on the pool. Managed to get a 35,000 gal pool from 40• to 85• in three days @ 0 - 10• outside temp with a 160,000 btu boiler for a wild New Years eve party.
Good luck - Aint Hydronics great!
Roy

jw

A Cool Pool

I did one with a condensing gas boiler. Installed PAP pipe in the concrete floor of the pool. Could place it in the walls as well if need be. Used a tekmar 371/ RTU with a remote sensor.

Eliminates having to run filtration when there is a call for heat. Lets the pool keep warm when it needs to and the filter run when it needs to.

Bill Riordan_3

Stainless Or Titanium

Thanks for all the ideas. I noticed that the exchangers are available in titanium. Is this necessary for pool heating and are there any benefits?

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hvacsale

pool heating

I second the emotion on solar. My pool & spa totals aprox. 23,000 gals. The previous owner was paying $350 per month to heat the pool to 84 degrees. I put in solar and maintain 84-88 degrees for free. The downside to solar is the need to cover the pool when it isn't being used, especially when it is cloudy or cold out. In Maryland that probably isn't as much a factor as it is near Albany.

Pool heaters, or the new heat pumps work very well but you still have to pay for all those btu's.

Steve R

ladnek maine

inexpensive ideas

what, if any, might be some inexpensive ideas on solar heat for an above ground pool?

Nron_9

heat exchanger

The stainless steel is ok for chlorinated pools ,must have titanum for salt water pools
still look at solar for this you save enough money in the next couple of years help pay back the cost of the installation

hvacsale

Pool solar

When you own a pool every pool company in the world puts you on their mailing list. Occasionally it pays off, I bought mine from Leisure Living at: http://www.leisureliving.com/Product_PAGES/NewPages/SolarHeatingSystem.html I installed 3-panels and my system raises the pool temp. about 4 degrees per day. From a cold start up in April/May I can get my pool up to 80 within a week (provided Mother Nature cooperates). There are many systems available, make sure you get a 3-way valve and controller for the solar unless you like adjusting a manual bypass twice a day.

Steve R

[Deleted User]

Option to solar covers

A better option is an automatic safety cover. It will reduce heat and chemical use by nearly 70%, and keep kids safe. You can walk right across it when the pool is closed. It will also keep your pool clean. Expect to pay $8-10,000 for a professional install. Another option is "Solar Fish". They put a biodegradable product one molecule thick on the surface of the water, that retards evaporation. It will offer you about 40% savings in heat. We install pool safety covers. Let me know if you need any more info.