Inground Pool Heaters

4 inground pool heaters from Hayward, Raypak, ACiQ and more. Prices run $3,799 to $5,099.

Pool heaters whose title names inground pools.

We do not pick by hand: a pool heater is here because its listed specs pass the checks.

Raypak

Propane gas, 400000 Heating output, Inground, Propane

+400K BTU output for heating larger inground pools

+Runs on propane fuel

+Built for inground pool and spa use

−Requires a propane supply rather than electric hookup

$3,799.00-10%List: ~~$4,199.00~~

as of 11/04/2026 00:49 PST - Details

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, 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

Propane gas, 400000 Heating output, Inground, Propane

+400,000 BTU output for fast heating of large inground pools

+Runs on propane gas fuel

+Gas-fired design heats quickly regardless of outdoor temperature

−Propane fuel requires a propane supply connection

$5,099.00

as of 11/03/2026 23:21 PST - Details

Compare specs

Heater type	Heating output	Pool type	Spec score	Price
Propane gas	400000	Inground	n/a	$3,799.00 as of 11/04/2026 00:49 PST - Details
Natural gas	400000	Inground	n/a	$4,298.99 as of 11/04/2026 00:49 PST - Details
Natural gas	400000	Inground	n/a	$4,499.00 as of 11/04/2026 00:37 PST - Details
Propane gas	400000	Inground	n/a	$5,099.00 as of 11/03/2026 23:21 PST - Details

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