 | Electric swimming pool heaters are better for extended use. They can keep the pool between 80 degrees and 90 degrees Fahrenheit (26 to 32 degrees Celsius), as long as the temperature outside is above 45 degrees Fahrenheit (7 degrees Celsius). However, they take longer to warm the water than gas pool heaters. Electric pool heaters are actually heat pumps; they extract heat from the air, transfer it to a compressor to heat it more, then pass the heat into the pool. Electric heat pumps typically cost more upfront. However, they cost less to operate than gas pumps and are considered more environmentally friendly.
Pool heaters use electricity to run their pumps, but they also use sun-warmed air, which means they don't need to generate any heat. A fan moves the warmed air through an evaporator coil that collects the heat from the air. The coil has liquid refrigerant in it, which absorbs the heat from the air. When this happens, it changes into a gas. Next, the gas is pumped into a compressor, which intensifies the heat.
Water is Heated As It Moves Through the Pump
Once the gas is hot enough, it moves from the compressor to the heat exchanger condenser. This is where the water passes through. Cool pool water is pumped through the heat exchanger condenser, and as it passes through, the cool water takes the heat from the gas. The water becomes warm, and the gas becomes cool.
The Process Begins Again
Once the gas loses its heat to the water, it becomes a refrigerant liquid again. It is then pumped through something called an expansion valve, into the evaporator air coil, and the process to heat the pool water begins all over again. |
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