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What Size of Pool Heater Do I Need?

Determining the size of a pool heater you need depends on several factors, including the size of your pool, the desired temperature increase, and your location’s climate. Here’s a general guideline to help you calculate the appropriate size for your pool heater:

Calculate the Pool’s Surface Area

Please measure the length and width of your pool in feet and multiply them to find the surface area in square feet. For example, if your pool is 20 feet long and 10 feet wide, the surface area is 200 square feet.

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Determine the Desired Temperature Rise

Decide how much you want to increase the pool’s temperature above the ambient temperature. This will depend on your comfort preferences and the climate. A common goal is to heat the pool by around 10-15 degrees Fahrenheit.

Estimate the Heat Loss

Heat loss depends on various factors, such as the pool’s location, wind exposure, and insulation. Generally, a well-insulated pool in a sheltered area will lose less heat than an exposed pool in a windy location. You may need to consult a professional for a more accurate heat loss estimate.

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Choose the Right Type of Pool Heater

There are vast differences between the performance, efficiency and price of gas and electric pool heaters. Here are a few factors to consider –

Electric Pool Heaters

How They Work: Electric pool heaters use electricity to generate heat, which is then transferred to the pool water through heating elements.

Efficiency: Electric heaters are generally less energy-efficient compared to other options, which can result in higher operating costs.

Installation: They are relatively easy to install and can be used in any weather conditions.

Operating Costs: Electric heaters tend to have higher ongoing operational costs due to electricity prices in Australia.

Environmental Impact: While electric heaters produce no direct emissions at the pool site, they rely on electricity generation, which can be powered by fossil fuels, thus contributing to greenhouse gas emissions.

Gas Pool Heaters (Natural Gas or LPG)

How They Work: Gas pool heaters use natural gas or propane (LPG) to heat the water through combustion.

Efficiency: Gas heaters are more energy-efficient than electric heaters, providing faster heating for your pool.

Installation: They require a gas supply connection and proper ventilation to ensure safe operation.

Operating Costs: Gas heaters can have lower operational costs than electric heaters, especially if you can access affordable natural gas.

Environmental Impact: Gas heaters produce emissions during combustion, contributing to air pollution and greenhouse gas emissions, making them less environmentally friendly.

Pool & Spa Heaters Perth

At Pool & Spa Heaters Perth, we have over 20 years of experience supplying, installing, repairing and servicing pool and spa heaters throughout Perth and Western Australia. As a family-owned and operated business with low overheads, we consistently deliver a high level of workmanship and attention to detail you won’t find from a large retail pool heating company.

Scott has helped hundreds of homeowners and commercial pools heat their swimming pools efficiently and effectively using the latest technology on the market.

Whether you’re interested in heating your pool or looking for repairs or servicing to an existing gas or electric pool heater, call Scott today to schedule a free inspection and quotation at your home or business.

“Our experience with Pool & Spa Heaters Perth has been exceptional. Their attention to detail and fantastic customer service made our experience a good one. We will be sure to recommend to family and friends.”
Paula Hulse

“Quality of work was outstanding on my pool heater install. Good communication throughout the job and price was fair. Highly recommended.”
Keithy George


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