The Pentair SR400HD Pool Heater is a heavy-duty 400,000 BTU natural gas heater engineered for large residential and commercial pool systems. Featuring a cupro-nickel heat exchanger and a durable, rustproof composite housing, this model delivers reliable heating performance, superior corrosion resistance, and energy-efficient operation in demanding pool environments.

Key Features

• Genuine Pentair heavy-duty pool and spa heater (Model SR400HD)

• 400,000 BTU natural gas heating capacity for large pools and spas

• Cupro-nickel heat exchanger for enhanced durability in saltwater and high-use applications

• Dura-Glas™ rustproof housing and plastic manifold for long-lasting protection

• Digital LED temperature readout with dual thermostat controls and safety lockout

• Induced-draft PMG burner technology—no outdoor draft hood required

• Compatible for indoor or outdoor installations

• Eco Select® certified for energy efficiency and low NOx emissions

• Operates quietly with advanced combustion control

• Minimum order quantity (M.O.Q.): 4 units

Product Overview
The Pentair SR400HD Pool Heater combines advanced heating technology with heavy-duty construction to deliver powerful and dependable performance. Its 400K BTU output and cupro-nickel heat exchanger make it ideal for harsh pool conditions, including saltwater systems and high-flow applications.

Built with Pentair’s signature Dura-Glas™ rustproof exterior and advanced burner system, this heater provides efficient, consistent heating without requiring a draft hood for outdoor use. Easy to install and operate, the SR400HD ensures optimal comfort, reliability, and energy savings for pool professionals and facility managers seeking commercial-grade heating power with long-term durability.