Best Natural Gas Swimming Pool Heaters in 2026

Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature

Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches

Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.

BEST FOR: In-ground pools and spas with a surface area up to 400 ft. where natural gas is available. Its low environmental impact makes it ideal for pools and spas located where low-NOx emissions are required.

PREMIUM PERFORMANCE: The Hayward Universal H-Series 150,000 BTU Natural Gas Heater delivers fast premium heating performance for years of reliable, long-lasting comfort.

CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry.

Built to withstand various weather conditions, perfect solution for environments requiring efficiency, convenience and versatility.

Intermittent spark ignition pilot safety controls. Pilot only comes on when there is a call for heat.

Space-age material means the heater won't retain residual heat after it is turned off, allowing it to be installed without the use of costly metal heat sinks.

CLEAN AND GREEN: The FH055 is powered by clean electricity, reducing the harmful environmental effects and cost of traditional heaters that use natural gas or propane. Our pumps instead move heat from the air into the water, which saves you money and is a breeze to maintain

COMPATIBLE WITH: In ground pools up to 10,000 gallons and above ground pools up to 21 foot round or 15 by 30 foot oval. As with all heat pumps, we recommend using in a humid climate down to 50 degrees for best performance. Dry climates are better served by a traditional gas heater

HIGH EFFICIENCY: Utilizing high-pressure differential compressors and titanium heat exchangers, FibroPool heat pumps are meticulously designed to be the most energy efficient in their class. You can rest comfortably knowing your family will enjoy years of late season swimming without feeling a squeeze on your electric bill

【2000W Ultra Fast Heating】2000W immersion water heater heats up faster. When you're out camping or traveling, the high-power travel bucket water heater can quickly heat up 5 gallons of water in minutes, saving you time and power consumption.Faster than 1500W immersion water heater.

【Easy to Operate】The design of the submersible portable water heater is simple. Small size, easy to carry when you travel, (How to use: Please make sure the immersion heater is fully immersed in water, and then connect the 125v/110v power supply. Equipped with a digital LCD thermometer, after heating for a period of time, put the probe into the water to test the water temperature.)

【Upgrade Design】2000W High power Immersion heater adopts a stainless steel protective shell, with a solid structure, high bending strength, and very safe. Below the protective hole, the heat is released faster. The bottom drainage design adopts high-temperature and wear-resistant material to drain to prevent accidental injury.

Enjoy your pool and easily heat up your above-ground swimming pool with renewable energy; FAFCO's Connected Tube (CT) design is the most efficient solar panel available

FAFCO is the oldest and largest solar pool heating manufacturer in America; Every unit is inspected and tested and made from stabilized polyolefins for a long life

Works with most above-ground pools, pumps, and filters; Starter Kit included

We recommend that all installations of units must be done by the local building and plumbing codes of the installation location and installation be done by a licensed professional.

The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.

180,000 BTU high heating capacity and maximum 8.1 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family. UEF over 0.81, the high energy conversion rate can effectively reduce energy loss.

Part Number: 014941

Model Number: P-R406A-EN-X

Cupro-nickel gas pool and spa heater

【Outdoor installation to save space】The product is installed outdoors and does not occupy the living space. The bottom built-in forced DC fan eliminates the influence of external wind. So as to ensure the stability of combustion, achieve safety, energy saving and no pollution. We recommend that all installations are carried out in accordance with local building and plumbing codes by licensed professionals.

【Endless water supply without preheating】The heat exchanger quickly heats the water to a maximum of 140°F, which is ready for use without waiting for hot water. It can run at approximately 6.3 GPM for 40 minutes, enough to produce almost 240 gallons of hot water. Make a multi-point water supply for the whole house to meet your family's water needs.

【Precise temperature control and stable temperature】Equipped with a wire controller cord length of 164ft, allowing you to control the water temperature indoors. The burner can be burnt in sections to meet the water temperature demand in the four seasons. Benefiting from the calculation and control of the heating power 1000/s by the chip, the temperature difference of the water can be precisely controlled within ±2°F.

PROVEN RELIABILITY. There's a reason the SwimEasy High Performance Solar Heater Kit has been used by solar enthusiasts for decades — it works the first day and continues to work for 15–20 years, through all types of weather and harsh rooftop conditions.

UNIVERSAL COMPATIBILITY. The SwimEasy is the right choice for making the cost-saving move to solar, fitting interchangeably with a solar pool heater panel with a round 2" I.D. header manifold that connects with a rubber hose connector.

SIMPLE INSTALL. Start enjoying your heated swimming pool with less hassle and faster assembly. Simply use rubber couplings and metal hose clamps to secure the heating system. Install panels vertically for better performance and drainage.

Part Number: 014784 | Model Number: P-R156A-EN-C

Allows you to extend your swim season, open your pool earlier and close it later.

Perfect choice for above-ground pools and spas

Part Number: 009220

Model Number: P-R206A-EN-C

LCD digital display provides accurate temperature

🏊SOLAR HEATING: Easily heat up your above-ground swimming pool with environmentally-friendly solar panel.

🏊CONSISTENT HEATING: Eliminates hot and cold spots with a patented metering system for consistent heating throughout.

🏊MAXIMIZE CIRCULATION: Flow chamber and flow metering holes between header pipes and collector tubes maximize circulation and heating efficiency.

Has a polyester-coated, non-corrosive cabinet that is more durable than solvent-borne- and waterborne-coated metal cabinets.

Designed to draft naturally in outdoor installations with its exclusive low-profile design.

Available with digital electronic ignition, or as a millivolt design.

Integral Fin Copper Exchanger Tube

Corrosion-Free Polymer Headers

Backlit LCD Controls

Designed for easy installation on above ground pools, smaller in-ground pools, and spas

Standard 120v 3-prong power cord or can be easily converted to 220v

Simple analog thermostat dial for accurate pool and spa temperature setting

Master Temp 125K BTU

Package Dimensions: 43.0 L x 28.0 H x 30.0 W (inches)

That's suitable to heat pools or spas up to 15,000 gallons.

GREAT FOR SMALLER POOLS: Natural gas heater boasts 125,000 BTUs, designed for smaller bodies of water up to 15,000 gallons

COMPACT AND EFFICIENT: Compact design with 82-percent efficiency as compared to larger pool heaters; Quiet operation makes sure not to impose on leisure pool time

THOUGHTFUL, USER-FRIENDLY DESIGN:: Rotating digital display allows for any installation rotation and is easy to read; User-friendly indicator lights allow for simple system operation and monitoring; Corrosion and UV-resistant housing deliver durable, lasting use

Lochinvar Model: ERN252

Digital controls allow easy access to temperature settings

Features a rust-free surface and advanced combustion system