Get Pool Heater Sizing Help

In order to most efficiently size a pool heater accurately for you, please provide the following information.

Contact Info
Where will the pool be located?
Please provide city and state. We have climate models for many cities. It is more important to select a climate close to your location than to be geographically close.
Is this a commercial or residential installation?
Building code requirements prohibit the use of residential-grade units over 200,000 BTUH input on a commercial installation. Units over 400,000 BTUH are all built as commercial.
At what elevation is the pool located?
Combustion is affected by the changes in oxygen content at elevation, so it needs to be taken into account. Elevations below 2000’ are considered sea-level. Elevations above 2000’ will affect the output of the unit and runtime; a larger heater may be required.
What are the dimensions of the pool?
Surface area and depth, or total # of gallons and an idea of average depth.
What pool temperature do you want to maintain?
Common temperatures:
Recreational swimming, 82-83F for commercial installations.
Residential installations may be higher than 82F depending on the user’s comfort level.
Athletic training, 78-80F
Therapy, 85-87F or higher
What fuel? What rate?
We can estimate running costs.
We can make many of our units operate on other fuels, but need data on which to base the engineering changes. We need the chemical composition and characteristics of the fuel gas (anything over 1 percent), to determine heating value and specific gravity of the mixture. Please be aware that the Raytherm product line is more flexible in this respect; our fan-assisted product lines cannot tolerate as much variation in the fuel.
Will the heater be located indoors or outdoors?
Certain models must be indoor.
How exposed is the pool to wind/sun/shade? Is it indoors?
This affects evaporative losses. Indoor pools have dramatically lower evaporative losses.
Will there be a cover on the pool, and how often?
Pool covers are a huge energy savings.
Over what portion of the year will the pool be in use?
Combined with the climate model, this gives us an idea of the heat losses to expect.

What is the local groundwater temperature?
This establishes both the temperature starting point and how much the pool temperature will drop over time.
How many heaters do you want to use for this installation?
It isn't always practical to use a single heater; having multiple units provides a backup if one needs repair. We’ll advise on how much heat you need, but whether that amount of heat is supplied by a single heater or multiple is largely your decision.