Pool Heating FAQ

Owning a pool in Arizona is a great way to beat the heat, but the winter months may turn your swims from refreshing to chilly. If you want to extend your swimming season, a pool heater can be a game-changer. While the Aqua Science team is known for our misting systems and water treatment solutions, we’re also experts in residential pool equipment in Phoenix. Whether you want to install a new system or are still deciding if you want a pool heater, review answers to some of our most frequently asked questions below to learn how local homeowners keep their pools warm and inviting year-round.

Picking the right heater depends on how you plan to use your pool. There isn’t a one-size-fits-all answer, so here’s a quick breakdown of the three main types:

• Gas Heaters – These are the sprinters of the pool heating world. They burn natural gas or propane to heat water quickly. Gas heaters are perfect if you don’t swim often but want the pool hot for a weekend party. However, they can be more expensive to run.
• Heat Pumps – These work like reverse air conditioners. They pull heat from the outside air and transfer it to the water. They’re incredibly energy-efficient and eco-friendly pool water systems, which work best when the outside temperature is above 50°F. Since Arizona winters are mild, heat pumps are popular choices.
• Solar Heaters – If you want to slash operating costs, solar is the way to go. These systems pump pool water through panels on your roof to collect heat from the sun. They rely entirely on the weather, so they heat slowly, but the heating mechanism – sunlight – is free.

Size matters when it comes to pool heating. If you get a unit that’s too small, it will run constantly and never quite reach the desired temperature. If it’s too big, you might spend more upfront than necessary.

To determine the right size, you must consider your pool’s surface area and the difference between the average air temperature and your desired water temperature. Our professionals can help you run the specific numbers, but generally, a standard 15’x30’ pool will need a heater rated between 300,000 and 400,000 British Thermal Units (BTUs).

Like any appliance, a pool heater won’t last forever. The lifespan depends heavily on the type of heater and how well you take care of it. Ignoring minor issues can lead to significant, expensive failures. However, typical lifespan ranges include:

• Gas heaters usually last five to 10 years.
• Heat pumps generally last longer, often between 10 and 20 years.
• Solar heating systems are the durability champions, lasting 15 to 20 years.

This is a common misconception. A heater warms the water, but it doesn’t clean it. However, your heater works in tandem with your pool filtration and softening solutions. The water must pass through the filter before entering the heater to prevent dirt and debris from clogging the heating element.

If your water chemistry is off or your filter is dirty, it can damage the heater. Scale buildup from hard water is a major threat to heater longevity. If you’re considering a saltwater pool conversion in Arizona, make sure your heater is compatible, as salt can be corrosive to certain metals.

Pool heater effectiveness is typically measured by comparing how much energy goes into the unit against the amount of heat generated in the water. Gas heaters have an efficiency rating called the Coefficient of Performance (COP). Modern heaters are about 80% to 95% efficient. Heat pumps are also measured by COP, but because they move heat rather than generate it, their efficiency can be over 500%. That means for every dollar of electricity you spend, you get five dollars’ worth of heat.

You don’t need to be a mechanic to keep your heater happy, but you do need to be consistent. Here are a few easy tips:

• Keep the Filter Clean – A clogged filter restricts water flow, which can cause the heater to overheat or shut down.
• Check the Chemistry – Balancing pH levels is crucial because acidic water can eat away at heater parts.
• Clear Debris – Keep the area around heat pumps clear so that air can flow freely.
• Annual Check-Ups – Have a pro from Aqua Science inspect a gas heater’s burner tubes or the coils in heat pumps annually to catch and remove any soot or blockages.

The biggest benefit of a pool heater is obvious: a warmer pool. But beyond comfort, a heater will add value to your home and lifestyle through:

• Extended Season – Swim in March and November rather than just the summer.
• Night Swimming – Enjoy a dip after the sun goes down without shivering.
• Health Benefits – Warm water is great for relaxing muscles and joint therapy.

Don’t let cool weather keep you on dry land. Aqua Science can help you install a pool heater or pool water treatment system in Arizona. Contact us today to request a free quote.