When you buy through our links, we may earn a commission. Learn more ›
Wiki Shopping
Wiki Shopping
TipsLearnAbout
Wiki Shopping

400,000 BTU Pool Heaters

All Pool Heaters

5 400,000 BTU pool heaters from Pentair, Hayward and Raypak. Prices run $4,299 to $5,099.

All filtersFilters (2)×
Heater type: Natural gas  ×Heating output: 400000  ×Clear all
BrandHayward2Pentair2Raypak1
Heater typeNatural gas5Propane gas4
Heating output4000005
Pool typeInground4
FuelNatural gas4
Price$4,000 & above3$5,000 & above1
Clear allShow 5 Pool Heaters
Heater type: Natural gas  ×Heating output: 400000  ×5 resultsSort byRecommendedSpec scorePrice: low to highPrice: high to low
Raypak

Natural gas, 400000 Heating output, Inground, Natural gas

+400K BTU output for heating larger inground pools
+Runs on natural gas fuel
+Built for inground pool and spa use
−Requires a natural gas line rather than electric hookup
$4,298.99
as of 11/04/2026 00:49 PST - Details
Pentair

Natural gas, 400000 Heating output, Natural gas

+400,000 BTU output for larger pools
+Natural gas fuel, no propane tank needed
+Titanium heat exchanger for corrosion resistance
−Requires a natural gas line connection
No price recorded yet.
Pentair

Natural gas, 400000 Heating output, Inground

+Rated at 400,000 BTU for inground pool heating
+Runs on natural gas fuel
+Suitable for both pools and spas
$4,499.00
as of 11/04/2026 00:37 PST - Details
Hayward

Natural gas, 400000 Heating output, Inground, Natural gas

+400000 heating output: the highest heating output of the 10 here
$5,099.00
as of 11/03/2026 23:21 PST - Details
Hayward

Natural gas, 400000 Heating output, Inground, Natural gas

+400000 heating output: the highest heating output of the 10 here
No price recorded yet.

Compare specs

pool heaterHeater typeHeating outputPool typeFuelSpec scorePrice
Natural gas400000IngroundNatural gasn/a$4,298.99
as of 11/04/2026 00:49 PST - Details
Natural gas400000Natural gasn/aNo current price
Natural gas400000Ingroundn/a$4,499.00
as of 11/04/2026 00:37 PST - Details
Natural gas400000IngroundNatural gasn/a$5,099.00
as of 11/03/2026 23:21 PST - Details
Natural gas400000IngroundNatural gasn/aNo current price

Before you buy

Other Heating output options

Hot Tubs194Pool Cleaners262Pool Pumps73Saunas1,505Pool Thermometers48Pool Chemicals & Test Kits61Handheld Pool Vacuums66Pool Brushes62Pool Maintenance Kits58Pool Vacuum Heads67Pool Skimmers & Nets65DE Pool Filters61

Popular filters

Natural Gas Pool Heaters42Pool Heaters: Natural Gas41Heat Pump Pool Heaters28Pool Heaters: Propane23Pool Heaters for Inground Pools12266,000 BTU Pool Heaters10Pool Heaters for Inground and Above-Ground Pools9399,000 BTU Pool Heaters7

Pool Heaters by use

Inground Pool Heaters20Above Ground Pool Heaters12250,000 BTU Pool Heaters and Up48

Related product types

266,000 BTU Pool Heaters10399,000 BTU Pool Heaters7

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