How to Heat an Above-Ground Pool?

Best Pool Heaters to Buy in October 2025

1

Hayward W3H250FDN Universal H-Series 250,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas

• PREMIUM HEATING PERFORMANCE FOR RELIABLE, LONG-LASTING COMFORT.
• DURABLE CUPRO-NICKEL DESIGN PROTECTS AGAINST CORROSION AND FAILURE.
• ENERGY-SAVING HYDRAULIC DESIGN REDUCES PUMP RUN TIME SIGNIFICANTLY.

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$3,499.00

2

Aquastrong Inverter Swimming Pool Heat Pump, 75,000 BTU 21,000 Gallons Electric Pool Heater for Above Ground and Inground Pool, WiFi Capable Timer, Heating and Cooling Pool Heater 220V

• ENJOY YEAR-ROUND SWIMMING WITH PRECISE HEATING AND COOLING CONTROL.
• RAPID 75,000 BTU HEATING; CONTROL REMOTELY VIA APP FOR CONVENIENCE.
• QUIET OPERATION AND 70% ENERGY SAVINGS OVER TRADITIONAL HEATING SYSTEMS.

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$1,998.99 $2,799.00

Save 29%

3

WOPOLTOP 100,000 BTU Full DC Inverter Pool Heat Pump for Swimming Pools, Dual Function of Heating and Cooling, 30KW Electric Pool Heater with WiFi Smart Control via APP, 220-240V, up to 26,000 Gallons

• ENERGY EFFICIENT: FULL FREQUENCY CONVERSION SAVES POWER AND BOOSTS SAVINGS.

• SMART CONTROL: WIFI CAPABILITY ENABLES EASY REMOTE TEMP ADJUSTMENTS.

• QUIET OPERATION: NOISE REDUCTION DESIGN ENSURES PEACEFUL POOLSIDE ENJOYMENT.

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$2,399.00 $3,299.00

Save 27%

4

Pool Heater, Portable Water Heater 2000W - Immersion Heater with Digital Thermometer, Upgraded Magnesium Oxide Heating for Fast Heating, for Small Pools, Bathtubs, Buckets, Tanks

• RAPID 2000W HEATING WARMS 5 GALLONS IN MINUTES-NO MORE COLD WATER!

• SMART LCD DISPLAYS REAL-TIME TEMP FOR PRECISE HEATING CONTROL.

• PROFESSIONAL SAFETY WITH AUTO SHUT-OFF AT 165°F PREVENTS SCALDING.

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$19.99 $39.99

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5

72000 BTU Pool Heater, for 9000 Gallons Inground Ground Pools,Swimming Pool Heaters,230V~240V with Digital Display Multi-Protectionle Timer, Heating and Cooling Pool Heater

• RAPID HEATING: HEATS POOLS UP TO 9,000 GALLONS IN CHILLY WEATHER.
• ECO-FRIENDLY SAVINGS: REDUCES ENERGY USE BY UP TO 70% WITH DC INVERTER TECH.
• WHISPER-QUIET: OPERATES AT JUST 52DB FOR PEACEFUL POOLSIDE ENJOYMENT.

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$999.99

6

Raypak 009218 PR336AENC49 336000 BTU Natural Gas Pool Heater

• DURABLE INTEGRAL FIN COPPER EXCHANGER FOR MAXIMUM EFFICIENCY.
• CORROSION-FREE POLYMER HEADERS ENSURE LONG-LASTING PERFORMANCE.
• EASY-TO-USE BACKLIT LCD CONTROLS WITH SELF-DIAGNOSTIC FEATURES.

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$3,445.00

7

Raypak Digital Cupro-Nickel Natural Gas 240,000 BTU Pool Heater - 014939

• DURABLE CUPRO-NICKEL DESIGN FOR OPTIMAL HEATING PERFORMANCE.
• PAGODA DESIGN KEEPS HEATER RUNNING IN HARSH WEATHER.
• EASY REMOTE ACCESS WITH MICROPROCESSOR-CONTROLLED THERMOSTAT.

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$3,529.00

8

FibroPool Swimming Pool Heat Pump - FH270 70,000 BTU - for Above and In Ground Pools and Spas - High Efficiency, All Electric Heater - No Natural Gas or Propane Needed

• SAVE MONEY AND THE PLANET WITH OUR ENERGY-EFFICIENT HEAT PUMP.
• IDEAL FOR POOLS UP TO 15,000 GALLONS; ENJOY SWIMMING ALL SEASON!
• RUGGED DESIGN AND EASY DIGITAL CONTROLS FOR HASSLE-FREE OPERATION.

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$2,249.99 $2,499.99

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ONE MORE?

Heating an above-ground pool is essential if you want to extend your swimming season, especially during cooler weather. There are a few different ways to heat an above-ground pool, and the method you choose may depend on factors like your budget and the climate in your area.

1. Solar Covers: Using a solar cover is one of the most economical methods of heating an above-ground pool. These covers are made from a special material that traps the sun's heat and transfers it to the pool water. Solar covers can raise the water temperature by a few degrees, but they work best when used consistently and in combination with other heating methods.
2. Solar Rings or Sun Squares: Similar to solar covers, solar rings and sun squares are floating devices that harness the sun's heat to warm the pool water. These devices are placed directly on the water surface and can raise the temperature by a few degrees.
3. Solar Panels: Installing solar panels is a more substantial investment, but it provides a reliable source of heating for your pool. Solar panels harness the sun's energy and convert it into heat, which is then transferred to the pool water. The panels are typically mounted on the roof or the ground near the pool, and the water is circulated through them to be heated before returning to the pool.
4. Heat Pumps: Heat pumps are another popular choice for heating above-ground pools. They operate by using electricity to extract heat from the surrounding air and transfer it to the pool water. Heat pumps are energy-efficient and can maintain the desired water temperature regardless of the weather conditions. However, they can be more expensive to purchase compared to other heating methods.
5. Gas Heaters: Gas heaters offer a quick and efficient way to warm up your above-ground pool. These heaters run on natural gas or propane and can heat the water to the desired temperature within a short period. However, operating costs may be higher compared to other heating options, and gas heaters require a proper gas line installation.
6. Electric Resistance Heaters: Electric resistance heaters are relatively simple to install and use. They work by passing an electric current through a heating element, which then warms up the water as it flows through the heater. While electric resistance heaters can effectively heat above-ground pools, they tend to have higher operating costs compared to other methods.

When selecting a heating method for your above-ground pool, consider factors such as cost, climate, and personal preferences. Combination approaches, such as using solar covers or rings in conjunction with a heat pump, can also help optimize pool water temperature and energy efficiency.

How to heat an above-ground pool without electricity?

Heating an above-ground pool without electricity can be a bit challenging, but here are a few options you can consider:

1. Solar Covers: Invest in a solar cover specifically designed for above-ground pools. These covers absorb sunlight during the day and retain the heat, raising the temperature of the pool water. They act as natural solar heaters and can help increase the water temperature by a few degrees.
2. Solar Heaters: Solar heating systems for pools are another effective option. They utilize solar panels to capture sunlight and heat the pool water as it circulates through the system. Although this method requires an initial investment, it can provide consistent heating throughout the swimming season.
3. Black Hose Method: This is a simple and inexpensive method where you connect a black garden hose to a pool pump. Coil the hose in a sunny area and make sure the entire length of the hose is exposed to sunlight. The dark color of the hose absorbs the heat from the sun, transferring it to the pool water as it passes through. It may take a while to heat up the pool, but it can help raise the temperature.
4. Heat Exchanger: If you have a wood-burning stove or another heat source at your disposal, you can use a heat exchanger. This system involves building a small fire and circulating the heated water from the heat source through the exchanger, which transfers the heat to the pool water as it flows through. It requires some plumbing knowledge and may only be suitable for certain setups.
5. Use a Pool Blanket or Tarp: On cooler nights or during periods of no use, cover your pool with a pool blanket or tarp. This cover can help retain some of the heat accumulated during the day and prevent heat loss during colder evenings.

Remember that these methods may not provide as much consistent heat as electric-powered heaters, and the effectiveness will depend on various factors such as climate, sunlight availability, and pool size.

How to heat an above-ground pool with a pool blanket or cover?

Heating an above-ground pool with a pool blanket or cover is a relatively simple process. Here are the steps you can follow:

1. Ensure you have a pool blanket or cover specifically designed to retain heat. Look for a solar pool cover, which is designed to absorb sunlight and transfer heat to your pool.
2. Measure your pool's dimensions and purchase a pool blanket or cover that fits your pool size.
3. Thoroughly clean your pool by skimming debris, brushing the walls and floor, and vacuuming if necessary. A clean pool will heat up more efficiently.
4. Remove any pool accessories or toys from the water surface to maximize heat absorption.
5. Trim the pool blanket or cover to match the size and shape of your pool. Ensure it covers the entire pool surface, including the sides.
6. Place the pool blanket or cover on the water surface, making sure it is evenly spread out and free from wrinkles. You can also use a pool cover reel to help with the installation and removal process.
7. Use a pool cover pump to remove any standing water that accumulates on the cover. This prevents the weight of the water from pushing the cover into the pool and hindering its heating efficiency.
8. During daylight hours, keep the pool cover on to trap the heat from the sun. The cover acts as a barrier, preventing heat loss through evaporation and convection.
9. If possible, position your pool in an area that receives maximum sunlight exposure during the day. This will enhance the heating effect of the pool cover.
10. When using the pool, ensure the cover is removed completely and stored in a safe place to prevent any accidents.

By following these steps and properly utilizing a pool blanket or cover, you can significantly increase the water temperature in your above-ground pool.

How to heat an above-ground pool with a hot tub heater?

Heating an above-ground pool with a hot tub heater is possible, but there are a few things you need to consider and steps to follow. Here is a general guide on how to do it:

1. Determine the heater size: Determine the size and capacity of the hot tub heater you have or plan to purchase. Make sure it can handle the volume of water in your pool. As a general guideline, you should aim for a heater that can heat the pool's water at a rate of 1-2 degrees Fahrenheit per hour.
2. Calculate the pool volume: Measure or find out the dimensions of your above-ground pool to calculate its volume. You can use online calculators or formulas to determine the total gallons of water.
3. Install the hot tub heater: Install the hot tub heater according to the manufacturer's instructions. Ensure it is connected properly to a power source and to the pool's plumbing system.
4. Proper positioning: Position the hot tub heater in a location where it can efficiently heat the pool water. This might involve strategic placement to optimize heat distribution.
5. Pool water circulation: Make sure the pool water is properly circulating to allow for even heating. If your pool has a pump and filter system, turn them on and ensure they are functioning correctly. If not, consider a separate system to circulate the water while the heater is operating.
6. Adjust the temperature: Set the desired temperature on the hot tub heater according to your preferences. Take into account the ambient temperature, desired swimming temperature, and the time it will take to heat up the pool.
7. Monitor and maintain: Regularly monitor the pool water temperature and make adjustments to the heater as needed. Additionally, ensure the heater is properly maintained by cleaning and inspecting it regularly.
8. Cover the pool: Cover your above-ground pool with a solar cover or pool blanket when not in use. This prevents heat loss and helps retain the heat generated by the hot tub heater.

Remember, heating an above-ground pool is a gradual process, so be patient. It may take some time to achieve the desired temperature, especially if the ambient temperature is significantly lower than the desired swimming temperature.