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Dimensions: 44.5" L × 34" W × 31" H
Heating Capacity: 399,000 BTU
Fuel Type: Natural Gas
Heat Exchanger: Cupro-Nickel Fin Tube
Header Material: Bronze (ASME)
Ignition Type: Digital Electronic Ignition
Elevation Rating: 2,000–6,000 Feet

The Raypak 017406 B-R406A-EN-X #51 ASME Digital Natural Gas Pool & Spa Heater is engineered for commercial and high-demand residential applications requiring exceptional durability, dependable heating performance, and ASME-certified construction. Featuring a 399,000 BTU input, a premium cupro-nickel fin tube heat exchanger, heavy-duty bronze headers, and digital electronic ignition, this heater delivers fast, efficient water heating while meeting stringent ASME standards for commercial installations. Designed and orificed for elevations from 2,000 to 6,000 feet above sea level, it is an ideal solution for high-altitude hotels, apartment complexes, HOAs, aquatic facilities, fitness centers, and demanding residential pool and spa systems.

Built with Raypak's rugged polyester-coated galvanized steel cabinet, the B-R406A-EN-X #51 is designed to withstand harsh outdoor environments while providing years of dependable service. The patent-pending ProTek Shield corrosion protection module guards the heat exchanger against chemical and saltwater damage, while the Unitherm governor prevents condensation buildup during operation. A self-adjusting burner compensates automatically for gas pressure fluctuations, keeping performance consistent at altitude.

Operation is managed through Raypak's digital LCD control panel with microprocessor diagnostics, giving installers and operators continuous readouts and fault-code monitoring. The unit ships pre-fitted with the correct #51 burner orifice for its rated elevation range and is ASME-certified to meet state and local commercial code requirements for public pools and spas.

Key Features

• 399,000 BTU input for fast, reliable heat recovery in the largest applications
• Cupro-nickel fin tube heat exchanger resists corrosion from salt and chemicals
• Heavy-duty bronze headers rated for ASME commercial service
• Digital electronic ignition for reliable, consistent startup
• Factory-set #51 orifice for 2,000–6,000 ft elevation installations
• ProTek Shield corrosion protection module included
• Digital LCD control panel with microprocessor diagnostics
• Unitherm governor prevents internal condensation buildup
• Self-adjusting burner compensates for gas pressure fluctuations
• Polyester-coated galvanized steel cabinet for outdoor durability
• Compatible with automation and remote system integration
• Salt-chlorine generator compatible
• Low-profile design for flexible equipment pad placement

Specifications

What's Included

• Raypak B-R406A-EN-X #51 ASME digital natural gas heater
• ProTek Shield corrosion protection module
• 125# pressure relief valve
• Digital LCD control panel
• Installation and owner's manual

Backed by Raypak's decades of commercial heating expertise and nationwide dealer support network, the B-R406A-EN-X #51 is trusted by pool professionals for high-altitude installations where dependable, code-compliant heating performance is non-negotiable.

Learn more at https://www.raypak.com/products/pool-and-spa/professional-pool-and-spa-heaters/digital-gas-asme-pool-and-spa-heater/