Heater Size Chart

Sizing your Heater. Recommended BTU

Pool SizeVolume, GallonsVolume, LitersGas Heater BTUHeat Pump BTU
12′ x 24′12,96049,058100k – 150k BTU70k – 85k BTU
14′ x 28′17,64066,774150k – 200k BTU85k – 100k BTU
16′ x 32′23,04087,215200k – 250k BTU110k – 120k BTU
18′ x 36′29,160110,382250k – 300k BTU110k – 120k BTU
20′ x 40′36,000136,274300k – 400k BTU120k – 140k BTU
15′ Round7,95030,094~100k BTU50k – 70k BTU
18′ Round9,05034,257~100k BTU50k – 70k BTU
21′ Round15,58058,976100k – 150k BTU50k – 85k BTU
24′ Round20,35077,033150k – 200k BTU85k – 100k BTU

NOTE: All figures are approximate and are meant to be used as a guideline only. Heater performance may vary depending on weather conditions – wind, shade, etc. For sizing solar and electrical heaters, refer to each individual heater’s documentation.

Still have questions? Give us a call at 1-844-416-7665 or email [email protected] – we’ll be happy to help!