Hayward pool heaters are synonymous with efficiency and fast heating. Choose between top-rated natural gas or propane heaters from Hayward to warm your water and extend the hours you spend in the pool. The majority of Hayward pool heaters are low NOx heaters with an 84% industry-leading thermal efficiency rate. These heaters are one of the best choices for the environmentally concerned pool owner. Heating your swimming pool has the potential to increase its value, use and greatly extend your swim season. And Hayward heaters will allow you to enjoy your pool no matter the season.Natural gas and propane are some of the most effective swimming pool heaters in the industry. Swimming pool heaters from Hayward have a reputation for heating your water quickly and maintaining a consistent temperature according to your needs. These pool heaters will not only help save the environment, but also help you save costs. The H-Series pool heater from Hayward reduces the circulation time of the pump and can raise the temperature of an 800 gallon pool by 30 degrees Fahrenheit in less than an hour.