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how long does it take to heat a pool 20 degrees


Author: Poolking - Swimming Pool Equipment Manufacturer

Are you thinking of purchasing a pool but wondering how long it will take to heat up? Or maybe you already have a pool, but the water is too chilly for swimming. No matter what your situation is, this article will explore how long it takes to heat a pool by 20 degrees and what factors impact the heating process.

Factors Affecting Pool Temperature

Before we get into the details of how long it takes to heat up a pool by 20 degrees, let's discuss some of the factors that affect pool temperature.

1. Water Volume

The amount of water in your pool is a significant factor that affects its temperature. The more water you have in your pool, the longer it will take to heat up. On the other hand, a smaller pool will heat up faster due to having less water.

2. Pool Cover

A pool cover helps to retain heat, which means your pool will heat up faster and maintain a warmer temperature for a more extended period. However, if you don't use a cover, the heat will escape, and you'll lose energy.

3. Type of Heater

The type of heater you use will also impact how quickly your pool heats up. Gas and electric heaters are the most common types of pool heaters. Gas heaters heat pools faster but are more costly to run than electric heaters.

How Long Does It Take to Heat a Pool by 20 Degrees?

The time it takes to heat a pool by 20 degrees will vary based on the factors discussed above. Generally, it can take anywhere from 24-72 hours to heat a pool by 20 degrees. However, some variables can speed up or slow down the heating process.

1. Type of Heater

As mentioned earlier, the type of heater you use will impact the heating process. A gas heater is the most efficient way to heat a pool as it warms up the pool water faster. However, an electric heater is less expensive and less harmful to the environment than a gas heater.

2. Temperature Outside

The temperature outside can affect how quickly your pool heats up. In the summertime, when temperatures are higher, it takes less time for the pool water to heat up. In contrast, during colder months, it may take longer to warm up the same amount of water.

3. Pool Cover

Using a pool cover can significantly reduce the time it takes to heat a pool since it will retain the heat. By conserving heat energy your pool will warm up faster, and it will maintain its warmth longer.

4. Water Volume

The amount of water in your pool is also a contributing factor. A larger pool needs more energy and time to heat up, but it will hold heat longer than a smaller pool.

5. Insulation

Pool insulation is another way to reduce heat loss and consequently reduce heating time. Ensure that your pool is adequately insulated; if not, you may want to consider adding insulation to it.

How to Heat up Your Pool Faster

If you want to speed up the heating process, there are several things you can do to make it happen. With these strategies, you'll be able to enjoy your pool sooner:

1. Invest in a Gas Heater

A gas heater heats up water much faster than an electric heater. If you want your pool to heat up quickly, consider investing in a gas heater. The initial cost might be high, but in the long run, it will be worth it.

2. Use a Solar Cover

Using a solar pool cover to trap in heat energy is an excellent way of reducing heating time. This cover allows sunlight to penetrate and warm up the water, while preventing evaporation.

3. Heat Up Your Pool Early

If you know that you will be using your pool on a specific day, start heating it up ahead of time. This way, the water will be warm and ready for use when you need it.

4. Install a Heat Pump

Unlike traditional pool heaters, heat pumps can draw heat from the air and heat the pool water. They are much more energy-efficient than electric or gas heaters and can heat up a pool quickly.


The time it takes to heat up a pool by 20 degrees depends on various factors, such as the type of heater, the pool's size, the temperature outside, and insulation. To reduce heating time, consider investing in a gas heater, using a solar cover, heating your pool up early, or installing a heat pump.

By paying attention to these factors and following these tips, your pool will be warm and ready for use whenever you need it!


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