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Inground Pool Heaters
National Discount Pools
888-277-7665
Catalog Code: NDP0982
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Inground Pool Heaters

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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How it works:
Your pool pump circulates the pool's water. The water is drawn from the pool and then passes through a filter and into the heater. The heater's combustion chamber ignites the gas, heating tubes arranged above the burner tray. As the water passes through, the heat from these tubes is conducted to the water, increasing the water temperature. The water then returns to the pool and recirculates for consistent heating. The process is simple. The result is quick, controlled heat. Set your temperature properly and you can warm your pool without burning your budget.

Size Matters
For the best warmth, analyze your pool and choose the proper size heater. First decide what temperature you most desire for swimming, then look at the average temperature of the coldest month you plan to use your pool. Take the "average temperature of the coldest month" and subtract it from the temperature you most desire. This will give you the "temperature rise" you need or the amount of heat your water will need for your comfort. To determine the size of the heater you need to reach that temperature efficiently, simply take the square footage of your pool and apply this formula provided by the U.S. Department of Energy: Pool Area x Temperature Rise x 12. The answer is the btu/hour output requirement. Now you're ready to shop; soon you'll be ready to swim in comfort. Gas heaters are easy to install and easy to operate.


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How it works
Your pool pump circulates the pool's water. The water is drawn from the pool and then passes through a filter and into the heater. The heater's combustion chamber ignites the gas, heating copper tubes arranged above the burner tray. As the water passes through, the heat from these copper tubes is conducted to the water, increasing the water temperature. The water then returns to the pool and recirculates for consistent heating. The process is simple. The result is quick, controlled heat. Set your temperature properly and you can warm your pool without burning your budget.

Size Matters
For the best warmth, analyze your pool and choose the proper size heater. First decide what temperature you most desire for swimming, then look at the average temperature of the coldest month you plan to use your pool. Take the "average temperature of the coldest month" and subtract it from the temperature you most desire. This will give you the "temperature rise" you need or the amount of heat your water will need for your comfort. To determine the size of the heater you need to reach that temperature efficiently, simply take the square footage of your pool and apply this formula provided by the U.S. Department of Energy: Pool Area x Temperature Rise x 12. The answer is the btu/hour output requirement. Now you're ready to shop; soon you'll be ready to swim in comfort. Gas heaters are easy to install and easy to operate.


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