The sleek and stylish Rheem Digital Gas Pool and Spa Heater is available in Atmospheric and Low NOx models. The Digital Gas Pool and Spa Heaters feature innovative technology designed to keep your pool or spa at the perfect temperature for your enjoyment. Built to withstand various weather conditions, this modern pool and spa heater is the perfect solution for environments requiring efficiency, convenience and versatility. Whether upgrading your existing system or adding a new pool or spa to your home, our heater offers you flexible installation solutions. Thanks to a brilliant low-profile design, corrosion resistant cabinet made of galvanized metal, copper or cupronickel fin tube heat exchanger, and a bevy of advanced engineered materials you will be able to enjoy your heater year round.