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Extending The Season With Gas Heaters

Tired of closing your pool as soon as the weather gets cold? Are you looking to extend your swimming season by more than just a few weeks? Gas heaters are a great way to quickly heat your water, and they allow you to enjoy your pool for months past the end of swimming season!

Great for in-ground pools in every type of climate, gas heaters extend your swimming into the early spring and late fall by efficiently heating your water to a comfortable swimming temperature. They run on either propane or natural gas, and are efficient energy users, running at up to 80-95% efficiency! Purchasing a gas heater will give you months of warm water even during cold weather, and help you and your family spend more time in the pool than ever before!

Effective & Powerful

Gas heaters are some of the most effective and powerful pool heaters on the market. These types of heaters work by using fuel to heat the water before returning the water to the pool. All of Leslie’s gas heaters use hot surface ignition, meaning they do not use a pilot light. Pilot lights can be a hassle to start, and run the risk of being extinguished in wind or rain. These types of heaters are very easy to use, and require little maintenance.

Comfortable Water Temperatures

Gas heaters raise the temperature of a pool up to the ideal swimming range, between 78 – 82 degrees Fahrenheit, and because of this, most are capable of increasing the water temperature 30 degrees or more. Pools come in all shapes and sizes, and require varying amounts of heat in order for the water to reach comfortable temperatures. Our gas heaters range from 125K BTUs, ideal for small pools, and up to 400K BTUs, great for large pools. Pool owners in cold climates that see low temperatures for much of the early spring and late fall spring will want to consider a gas heater to help make their pool fun and enjoyable for much of the year.

Kids playing in heated pool water

Eco-Friendly Technology

Not only do gas heaters save you money by running at up to 95% efficiency, they also meet Low NOx Emissions Requirements. The pollutant known as Nitric Oxide (NOx) causes smog and acid rain when produced in large quantities. All of the gas heaters that Leslie’s offers proudly meet or exceed Low NOx Emissions Requirements, meaning you are getting the most advanced, eco-friendly heaters available that will keep your pool and your family safe and healthy.

Other Accessories

Heating your water is vital to enjoying your pool and extending your swimming season, but without retaining the heat in your pool using a solar cover, much of the energy that is used warming the pool will dissipate into the air. Using a solar cover along with a gas heater can save you as much as 50% of the cost of energy it takes to heat your pool. Combining a solar cover with a gas heater will heat your pool quickly, and will keep the pool warm long into the night, as well as later into the swimming season.

Sizing and Installation

For information on the individual models, please read the product pages below. For additional info on sizing and installation, please contact or visit your nearest Leslie’s Retail Location.

Features and Tips

  • Great for use in colder climates that require large increases in water temperature
  • Can extend your season by several months, both in early spring before swimming season, and late fall after swimming season
  • Range in capacity from 125K BTUs for small pools, up to 400K BTUs for large pools
  • Should be used along with a solar cover, in order to retain the heat inside your pool
  • Easy to use and easy to maintain
  • Our gas heaters meet or exceed Low NOx Emissions Requirements, keeping you and your family safe and healthy
  • Built to keep your pool warm year after year
  • Can be professionally installed by a trained Leslie’s technician

Essential Products

Leslie's AccuBlue Home


Leslie's 3 inch Chlorine Tablets


Leslie's Pool Maintenance


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Leslie’s makes every effort to provide accurate recommendations based upon current ANSI/APSP/ICC-5 2011 (R2022) standards, but codes and regulations change, and Leslie’s assumes no liability for any omissions or errors in this article or the outcome of any project. You must always exercise reasonable caution, carefully read the label on all products, follow all product directions, follow any current codes and regulations that may apply, and consult with a licensed professional if in doubt about any procedures. Leslie’s assumes no legal responsibility for your reliance or interpretation of the data contained herein, and makes no representations or warranties of any kind concerning the quality, safety, or suitability of the information, whether express or implied, including, without limitation, any implied warranties of merchantability or fitness for a particular purpose.