Another example if your pool is 15 000 gallons.
15000 gallon pool heater size.
Think of this a little like the miles per gallon mpg quoted as gas mileage on your car.
200 300 btu heaters.
In fact there are some websites that do use the number of gallons.
When you are determining which size pool heater to buy the first step is calculating your pool s surface area.
A lot of pool owners assume that you use your pool s gallon size to determine your heater size.
Up to 300 sq ft.
To heat in normal summer conditions when ambient air temperature average 70 f in a 24 hour period.
Heater size in btu hr.
Now that we have the minimum and maximum flow rates for your pool setup put them together to get to your flow rate range.
If your pool volume is 15 000 gallons then one turnover would be equal to 15 000 gallons.
Size at 4 btu s per gallon or 1 btu per litre of water.
For the 30 000 20 x 40 pool gallon example.
I mean the gallon size is important just in a roundabout way.
General rule of thumb with heaters.
So let s say you have a 15 000 gallon inground pool.
In the above example where we have been talking about a 20 000 gallon pool it was determined that a 207 500 btu heater would be good but we added 20 to the size to accommodate for environmental losses which pushed the size up to 250 000 btu.
With two turnovers per day your minimum flow rate comes to 20 8 gpm.
In the example cited in this article we determined we would need 207 500 btu per hour in order to heat our 20 000 gallon pool by 30 degrees over 24 hours.
10 000 gals to 20 000 gals.
An undersized pool heater will heat too slowly and a severely oversized pool heater may end up unnecessarily driving up the cost of this big investment.
One of the two main specs for determining the pool pump size you need.
1 000 gals to 10 000 gals.
Surface area of pool.
100 200 btu heaters.
10 412 x 20 208 240 btus per hour.
This turnover is required every 12 hours or twice a day.
Bigger is better but to a certain point.
Pumps on the other hand use a slightly different description of gallons per minute or gpm.
15 000 x 8 33 124 950 divide by 24 5 206 pool is at 55 f and required temp is 82 f so rise is 82 55 27.
Rules for sizing your heat pump pool heater.
27 x 5 206 140 562 btus.