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399,000 BTU Pool Heaters

All Pool Heaters

6 399,000 BTU pool heaters. Most cost $5,758 to $7,344, and half cost less than $5,867.

All filtersFilters (2)×
Heating output: 399000  ×Fuel: Natural gas  ×Clear all
BrandRaypak6
Heater typeNatural gas6
Heating output3990006
FuelNatural gas6Propane1
Clear allShow 6 Pool Heaters
Heating output: 399000  ×Fuel: Natural gas  ×6 resultsSort byRecommendedSpec scorePrice: low to highPrice: high to low
Raypak

Natural gas, 399000 Heating output, Natural gas

+Large 399K BTU output for heating bigger pools
+Runs on natural gas
+Low NOx design
$5,861.02
as of 11/04/2026 00:49 PST - Details
Raypak

Natural gas, 399000 Heating output, Natural gas

+399,000 BTU output for high heating capacity
+Runs on natural gas
+Cast iron ASME construction
No price recorded yet.
Raypak

Natural gas, 399000 Heating output, Natural gas

+Large 399k BTU output for heating bigger pools
+Runs on natural gas
+Digital controls for setting temperature
$5,758.15
as of 11/04/2026 00:49 PST - Details
Raypak

Natural gas, 399000 Heating output, Natural gas

+Large 399K BTU output for heating bigger pools
+Runs on natural gas
+Cupro-nickel heat exchanger
$7,308.00
as of 11/04/2026 00:49 PST - Details
Raypak

Natural gas, 399000 Heating output, Natural gas

+Large 399K BTU output for heating bigger pools
+Runs on natural gas
+Low NOx design
$5,867.00
as of 11/04/2026 00:49 PST - Details
Raypak

Natural gas, 399000 Heating output, Natural gas

+399,000 BTU natural gas output for faster heating
+Digital controls for setting the temperature
+Electronic ignition for starting the heater
$7,344.00
as of 11/04/2026 00:49 PST - Details

Compare specs

pool heaterHeater typeHeating outputFuelSpec scorePrice
Natural gas399000Natural gasn/a$5,861.02
as of 11/04/2026 00:49 PST - Details
Natural gas399000Natural gasn/aNo current price
Natural gas399000Natural gasn/a$5,758.15
as of 11/04/2026 00:49 PST - Details
Natural gas399000Natural gasn/a$7,308.00
as of 11/04/2026 00:49 PST - Details
Natural gas399000Natural gasn/a$5,867.00
as of 11/04/2026 00:49 PST - Details
Natural gas399000Natural gasn/a$7,344.00
as of 11/04/2026 00:49 PST - Details

Before you buy

Other Heating output options

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Popular filters

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Spec scores, pros and cons, and prices are explained in the How it works section of the About page.