There are three main types of pool heater systems to consider: gas, solar, and heat pump. Where you live, how big your pool is, and many other factors will determine which system is right for you.
Gas pool heaters are a good option for pools that are not used as frequently, because these systems are able to quickly bring pools up to temperature. You should check all gas swimming pool heaters for their efficiency, the ratio of the usable energy provided to energy supplied. A modern swimming pool heater will achieve between 85% and 95% efficiency. By choosing the most efficient pool heater available, you will save hundreds in energy bills every year.
Solar pool heaters are a great option for frequently used pools. Even if you do not live in a particularly warm climate, a pool solar heater might be a good fit. A good site for this system would be in an area without shade on a building that faces approximately south. Purchasing and installing a solar pool heater will cost between $3,000 and $4,500. Once you install your solar system, all of your pool heating is absolutely free. Depending on the site location and fuel costs in your area, your solar pool heating system will pay for itself through energy savings in 1.5 to 7 years. Unlike a gas system that will only last about 7-10 years, solar pool heaters have a running lifespan of about 20 years.
Geothermal swimming pool heaters are another option to consider. Using constant ground temperatures, a geothermal pool heater will raise the temperature of water during cold months and lower it during the dead of summer. Geothermal pool heating systems are only economically feasible in southern climates. The payback period for a geothermal system in the north is too long to warrant the initial investment. You can expect to achieve a 25 year working lifespan for the heating system, but the inside components of the ground loop will continue to work for upwards of 50 years.
Overall, solar pool heating systems are the most cost effective option for most climates and situations. Regardless of the type of pool heating system you choose, you should work with a certified professional to determine the proper size needed. To help insulate your pool and conserve the energy used to heat the water, consider purchasing a pool cover. Another tip to increase the efficiency of your pool system is to insulate the hot water piping leaving your heater system.
