In the Swim makes it easy and more affordable to enjoy a longer swimming season with Pentair pool heaters. Pentair makes reliable heaters in different sizes that operate on gas or propane. The Pentair UltraTemp high performance heat pump is the pinnacle in pool heaters. Models differ in power and size, but they all feature titanium heat exchangers, LCD displays, easy-to-use control panels, and use a fraction of the energy of a gas heater. The Pentair UltraTemp 140H-C model also features a water cooling cycle to help make pools more comfortable in warmer climates. In the Swim also carries the MasterTemp 125K BTU pool heater from Pentair. Available in natural gas or propane, the MasterTemp is a heavy-duty heater built with corrosion-resistant parts. It runs super quiet so you can have it going when you’re swimming or sitting by the pool. The Pentair MasterTemp Swimming pool heater is compact, but powerful. Depending on the model, this pool heater delivers 200K to 400K BTUs in natural gas or propane. Front and center controls make this heater very easy to use. Find the best Pentair pool heater for you at a great value at In the Swim. We carry pool supplies and pool equipment to take care of your entire pool and outdoor living space.