Regardless of your climate, a swimming pool heater makes it possible to extend your swimming season and enjoy warmer water in the pool. Usually the heater is installed after the pump and filter system are in place—the pump pushes the water through the filter and then on to the heater before returning the water to the pool.

swimming pool with heater

Following are the main types of pool heaters:


在大多数地区,最温暖游泳池的最受欢迎方式是气池加热器。气体加热器的火焰快速热水,取决于型号,可以相当有效。大多数气体加热器在公用事业公司的天然气管道上运行,但你可以得到丙烷燃料池加热器if natural-gas isn’t available at the site of the equipment. Oil-fired heaters are also available and often used in more-remote areas where natural gas is unavailable.

Gas pool heater
气池加热器具有不锈钢件,可耐用。该模型是200,000 BTU。Pentair

即使空气温度波动,燃气加热器也保持均匀的水温,但在寒冷的天气中,它们可以使用大量气体来实现这一目标。他们通常持续大约五年。保修因模型而异 - 许多覆盖产品只需1年,并且如果加热器未正确安装或者池水保持不正确,则务必在购买前读取保修。

In response to energy costs and environmental concerns, newer pool heaters are much more efficient than old ones, and some models are dubbed “Low NOx,” meaning they have lower emissions.Low NOx gas pool heaters可能在某些州,例如加州和德克萨斯州。与旧的效率低下的加热器相比,加热器评定为90%的效率,将储存您在长途繁忙的好处。较新的型号有飞行点火,意味着当控制调用热量时,火花点燃火焰。在较旧的模型中,导频灯经常运行,浪费气体。

State-of-the-art Low NOx gas pool heater operates at 400,000 BTU. This model is well rated.海沃德

Manufacturers produce products that range in size, which is measured by BTUs (seeWhat is a BTU?)。BTU越大,设备将越快浇水,它可以处理的容量越大。有关调整加热器的信息,请参阅下文。尺寸通常为约150,000至500,000 btus。

Coil gas pool heater.The most common type of gas heater is a coil heater, also called a flash heater. Here, the pool’s pump draws water through a heating coil located above the gas-fired flames of the unit’s combustion chamber. The flames heat the water as it passes through the coil.


Tank heater.Some spas are heated by a tank heater that operates like a standard home hot water heater, keeping a tankful of water hot and ready to be supplied to the spa.


An electric pool heater operates on the same principle as an electric hot water tank. Electric current heats a coil, which in turn heats the water. Compared to the ability of other energy sources, such as propane or natural gas, to heat water, however, it is a relatively slow process.

heat pump for pool

A good use of electricity to heat a pool is through a heat pump. Like air conditioners, which transfer warm indoor heat to the outside, heat pumps transfer warm outdoor air to the water. The air heats the refrigerant, the compressor further heats the air, the air is eventually compressed into a very hot gas, and a heat exchanger transfers the heat to the pool water.

Heat pump pool heaters cost more to buy than gas heaters but use a lot less energy and last longer. Because heat pumps rely on transferring warm air to the water, they are largely ineffective in cold weather or climates. They work best where the air temperature remains above 45 or 50 degrees Fahrenheit because they borrow warmth from the surrounding air in order to do the job.

Solar Swimming Pool Heaters

太阳能游泳池加热器are growing in popularity and in efficiency. Most types cost a lot initially—usually between $3,000 and $4,000 to buy and install—but have very low operating costs. According to the EPA, they last longer than gas or heat pump heaters—usually from 10 to 20 years with proper maintenance—and can provide a payback in seven years or less depending on local fuel costs.

If you are building a new pool, consider its position in relation to the sun. If it has a good southern exposure, with little shade, then you may not need a heater at all on sunny days. The type of pool cover you use (see游泳池清洁剂和封面)也可以大大影响从太阳储存的热量。

Solar Swimming Pool Water Heater

A solar swimming pool heater is cheaper and easier to install than a solar heater for the house, and, once it is installed, it costs virtually nothing to maintain.

In a typical setup, the solar system is a loop that is bypassed if water in the pool is warm enough; if the water needs heating, a valve sends water through the system.


An automated solar system may have two temperature sensors. One senses the temperature of the water in the solar collector; the other senses the temperature of the water in the pool. When the pool sensor indicates water needs to be heated, it opens a valve so that water flows through the solar collector before returning to the pool.

A solar system can usually be added to a pool’s existing piping. Depending upon how high or far away the solar panels will be from the equipment, the system may require a new pool pump because your existing pump may not be strong enough to push water through the system.

当然,太阳能热不会在夜间或阴天上运行 - 它只在泵运行时工作。出于这些原因,许多人选择还有标准的气体加热器,当水很酷并且太阳能收集器不能提供足够的热量时踢开。

如果你感兴趣这个选项,这是一个很好的我dea to have your site evaluated by a qualified solar thermal systems contractor.Though the components of a solar system are fairly straightforward, installing one is not a job for amateurs. The components need to be sized and installed correctly. Unless you’re an accomplished do-it-yourselfer, hire a pro with a proven track record of successful installations.

Calculating Pool Heater Size

Though you can run rough calculations, as described below, it’s best to have a pool expert determine the right size heater for your pool because many factors go into the calculation. These include the surface area of the pool, and the difference between your average air temperature and your desired water temperature. In addition, wind, humidity levels and nighttime temperatures can have considerable impact. For instance, if you live in an area with high wind speeds, low humidity, and cool nights, you will need a larger heater.

Calculating Gas Heater Size

To roughly calculate the size heater you need, you can plug a few numbers into the following formula.

The first number you need is the pool’s surface area in square feet. So multiply length x width. If your pool is a kidney or irregular shape, run rough calculations and round off the numbers.

Then subtract the average air temperature for the coldest month you will be using the pool from the water temperature that you want in order to get the “temperature rise.”

Now, plug these numbers into the following formula to find the BTUs per hour you need the pool heater to generate.

The formula is:Pool area x temperature rise x 12 = BTUs needed per hour.

Then adjust for wind. Figure you will need an increase of about 1 degree (or a little more) in water temperature per hour for a 3.5 miles-per-hour wind by the pool.




But, as a ballpark figure, the surface area of your solar collector needs to be about 70 percent of your pool’s surface area if you’re in a sunny climate and 100 percent if you’re in a region with less sun if the solar collector is facing south or west in open sun. The solar collector needs to increase in size if you want your water to be warmer, the collector doesn’t have full southern or western sun exposure, or if you want to extend your swimming season.

Next See:

Swimming Pool Pumps Buying Guide


Find Swimming Pool Heater Installation Help

Author Image
About Don Vandervort
Don Vandervort has developed his expertise for more than 30 years, as Building Editor for Sunset Books, Senior Editor at Home Magazine, author of more than 30 home improvement books, and writer of countless magazine articles. He appeared for 3 seasons on HGTV’s “The Fix,” and served as MSN’s home expert for several years. Don founded HomeTips in 1996.Read more about Don Vandervort