Raypak | 018051 | Model R404A Avia Pool & Spa Heater Propane 399 MBTUH 120/240V

The Raypak 018051 Avia Pool & Spa Heater is a high-performance propane heater engineered for fast heat-up, long-term durability, and modern connectivity. Rated at 399,000 BTU input, the Avia is designed for demanding residential and light commercial pool and spa applications where performance, efficiency, and serviceability are critical. Built with Raypak’s patented straight-tube heat exchanger and robust stainless steel combustion components, the Avia delivers consistent heating while simplifying maintenance. Dual-voltage 120/240V operation and integrated smart controls make this heater a future-ready solution for today’s automated pool environments.

Key Features
• 399,000 BTU propane-fired heater delivers rapid heat-up for pools and spas requiring high output performance
• Patented straight-tube heat exchanger design eliminates coils and bends for longer life and easier annual maintenance
• NiTek heat exchanger construction provides significantly higher erosion resistance compared to copper or cupronickel options
• 84 percent thermal efficiency meets modern Low NOx and energy efficiency requirements
• Dual-voltage 120/240V power compatibility simplifies electrical installation across a wide range of setups
• Drop-in replacement design aligns water and gas connections with many existing heaters to reduce installation time
• Fully serviceable top-access design allows quick access to key internal components
• Integrated Wi-Fi connectivity enables remote monitoring, diagnostics, and control through Raypak’s mobile interface
• Designed for propane operation with professional-grade combustion and safety controls
• Built and supported in the U.S.A. with a 3-year full heater warranty for residential applications

Product Overview
The Raypak Avia 399 MBTUH Propane Pool & Spa Heater sets a new standard for durability, efficiency, and smart integration in pool heating equipment. Its straight-tube heat exchanger design reduces internal stress points, improves longevity, and allows for easier preventative maintenance compared to traditional coil-based heaters. Combined with a stainless steel combustion chamber, the Avia is built to withstand harsh pool environments and high-duty cycles.

Engineered for modern pool systems, the Avia includes built-in Wi-Fi connectivity for remote diagnostics and monitoring, giving homeowners and service professionals greater insight into heater performance. The heater’s compact footprint, drop-in plumbing alignment, and dual-voltage capability make it ideal for both new installations and equipment replacements. For pool owners seeking a powerful, efficient, and intelligently designed propane heater, the Raypak 018051 Avia delivers professional-grade performance with long-term reliability.