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Gas Swimming Pool Heaters

Convection Gas Pool Heater

In most regions, the most popular way to warm a pool is with a gas heater. A gas heater’s flames heat water quickly and fairly efficiently. However, you may find that a solar heater (see Solar Swimming Pool Heaters) costs less to operate. Most commonly, a gas heater uses natural gas from the utility company. However, if there is no natural-gas pipe running to your house, the heater can be modified and fueled by propane via a propane tank on your property.

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 filter and then through the heater where it travels 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.

For a small pool or a spa, the best option may be a convection heater, which has a single large flame that heats slow-moving water in a large tube. In other instances, a tank heater may be best. This operates like a standard home hot water heater, keeping a tankful of water hot and ready to be supplied to the spa.

Gas Tank Pool Heater

As is the case with home water heaters, newer models are often much more energy efficient. A heater rated at 90 percent efficiency will save you a good deal over the long haul over an older model, which may only operate at 60 to 70 percent efficiency. Newer models have pilotless ignitions, meaning that a spark ignites the flames when the control calls for heat. In older models, the pilot light runs constantly, which wastes gas.

Have a gas heater inspected and cleaned by a heating pro at the beginning of each season. Adjusting the flames and cleaning the ports annually will make the unit run more efficiently.

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