The Raypak Avia 399K BTU heater delivers fast, consistent heating for large pools and spas with the industry’s smartest control system. Additionally, its advanced Wi-Fi platform, durable design, and precise temperature control create a premium heating experience. Specifically, the P-R404A-EN-N model installs cleanly in most equipment pads and brings efficient, year-round comfort.

What makes the Raypak Avia P-R404A-EN-N one of the most reliable natural-gas pool heaters for large residential pools?

The Avia 399K pairs high output with intelligent gas modulation that adapts to wind, temperature, and system flow. Furthermore, its built-in Raymote Wi-Fi control delivers precise temperature management from any device. Therefore, the Raypak Heater helps reduce wasted runtime and fuel costs. ShastaPoolSupply.com supports every Avia heater with expert product guidance. So, you get the correct model and long-lasting performance.