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Your Pool Heater Questions Answered

March 13, 2025
A woman lounges in her heated swimming pool.

Nothing beats the luxury of owning a perfectly heated pool and being able to enjoy a swim all year long. But if you’re considering adding a swimming pool heater or upgrading your current system, you probably have a few questions. From choosing the right type to understanding pool heater costs, educating yourself ahead of time can make all the difference in your pool’s comfort and efficiency.

At SPS PoolCare, we understand how to wade through the complexities of the world of pool heat pumps, gas heaters, and solar options. We have compiled answers to some of the most common questions about pool heaters so you can make the best choice for your pool and personal lifestyle.

1. What Are the Types of Pool Heaters?

There are three primary types of pool heaters, all of which play different roles. Each option has its advantages, so your decision will depend on factors like climate, budget, and usage habits. Here’s an overview:

  • Gas pool heaters. They run on propane or natural gas and heat your pool quickly, making them ideal for pools that are used intermittently.
  • Electric pool heat pumps. They use electricity to transfer heat from the air to the water, making them an efficient but slower choice.
  • Solar pool heaters. They use solar panels to harness the sun’s energy. While they are the most eco-friendly, their effectiveness depends on your area’s sunlight availability.

2. What Size Pool Heater Do I Need?

Choosing the right heater size depends on your pool’s volume, surface area, and climate. Larger pools or pools in cooler areas require higher British thermal units (Btu) ratings. A common rule of thumb is that for every 1,000 gallons of water, you need at least 50,000 Btus.

However, other factors like wind exposure and desired temperature increase should also be considered. Consulting the pool professionals at SPS PoolCare can help ensure you get the most efficient heater for your needs.

3. How Does a Pool Heater Work?

The process can vary slightly, but generally, a pool heater pulls water from the pool, heats it, and returns it to the water supply. Gas heaters burn fuel to generate heat, heat pumps extract warmth from the air, and solar heaters convert sunlight to energy.

A common question we get is, “How long does it take a pool to heat up?” The answer depends on the quality of your heater, pool size, and existing outside temperature. A gas heater can warm a pool within a few hours, while a heat pump or solar system may take a full day or more.

4. How Much Energy Do Pool Heaters Use?

Energy consumption depends on the type and size of your pool heater. Gas heaters typically have the highest energy usage, while pool heat pumps and solar heaters are more efficient. Investing in an energy efficient heater can lead to significant savings over time. Here are some more efficiency tips to save money:

  • Use a solar cover to retain heat.
  • Run the heater only when needed.
  • Choose a high-efficiency model that meets ENERGY STAR standards.

5. How Much Does a Pool Heater Cost?

Pool heater cost varies widely based on the build, size, and installation requirements. Gas heaters are generally more affordable upfront but have higher operating costs. Electric heat pumps and solar systems have higher initial investments but lower long-term expenses. You should consider your budget and future home plans before deciding.

6. When Is Pool Heater Repair Necessary?

Like any part of your house, your swimming pool heater will need maintenance and occasional pool heater repair. Thankfully, there are some signs that your heater may need attention that you can keep an eye out for. These include:

  • Lukewarm water. The pool isn’t reaching your desired temperature after having enough time to heat up.
  • Strange sounds. You hear unusual noises or screeches from the unit.
  • Unreliable utility. Your heater is cycling on and off randomly.
  • Broken parts. There’s visible damage or corrosion to external or internal components.

Investing in regular pool servicing can help extend the life of your heater and prevent costly breakdowns. SPS PoolCare is a trusted source of reliable pool services that include routine maintenance, cleaning, and upgrades. When you choose our team, you can continue to enjoy your pool with peace of mind.

Expert Pool Services From SPS PoolCare

Make owning a pool a joy with SPS PoolCare. We offer a suite of professional pool care services that can be a valuable investment whether your home has a small patio pool or a sprawling backyard oasis. Our friendly technicians have the experience necessary to keep your pool warm and inviting all year long.


Ready to get started? Find an SPS PoolCare service area near you to get in touch with our staff. You can also read through our blog for pool care tips!

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