{"product_id":"raypak-asme-b-r406a-en-c-51-399k-btu-natural-gas-copper-pool-heater","title":"Raypak ASME B-R406A-EN-C #51 399k BTU Natural Gas Copper Pool Heater","description":"\u003ch2\u003e\u003cstrong\u003eRaypak B-R406A-EN-C #51 399,000 BTU Natural Gas Copper Heater\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Raypak B-R406A-EN-C #51 is a 399,000 BTU natural gas pool and spa heater designed for maximum heating performance at moderate elevations. Built for large residential and light commercial pools, this model delivers rapid heat-up and consistent temperature control.\u003c\/p\u003e\n\u003cp\u003eFeaturing a copper fin tube heat exchanger, this heater provides efficient thermal transfer while maintaining durability in properly balanced pool systems. Its Professional Series construction ensures long-term reliability in outdoor environments.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eMaximum Heating Output with Reliable Elevation Performance\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe #51 configuration is designed for elevations between approximately 2,000 and 5,999 feet, ensuring proper combustion and efficient operation. The digital control system allows for precise temperature adjustments, while the electronic ignition system ensures dependable startup.\u003c\/p\u003e\n\u003cp\u003eThe copper heat exchanger delivers strong heating performance and efficiency, making this unit ideal for high-demand pool applications.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e399,000 BTU heating capacity for large pools and spas\u003c\/li\u003e\n\u003cli\u003e#51 configuration for moderate elevation operation\u003c\/li\u003e\n\u003cli\u003eNatural gas powered heater\u003c\/li\u003e\n\u003cli\u003eCopper fin tube heat exchanger for efficient heat transfer\u003c\/li\u003e\n\u003cli\u003eProfessional Series construction for long-term durability\u003c\/li\u003e\n\u003cli\u003eDigital control panel with microprocessor thermostat\u003c\/li\u003e\n\u003cli\u003eElectronic ignition system with no standing pilot\u003c\/li\u003e\n\u003cli\u003eApproximately 82% thermal efficiency\u003c\/li\u003e\n\u003cli\u003eDurable outdoor cabinet construction\u003c\/li\u003e\n\u003cli\u003eIdeal for high-demand pool systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eAbout the Raypak ASME Series\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eRaypak ASME Series pool heaters are engineered for commercial-grade performance and long-term reliability in high-demand pool and spa applications. Constructed in accordance with ASME standards, these heaters feature heavier-duty components and thicker heat exchangers designed to withstand continuous operation and higher system pressures. Available in both copper and cupronickel configurations, the ASME Series offers flexibility for standard and saltwater pool environments, with cupronickel models providing enhanced resistance to corrosion and chemical wear. The natural gas configuration delivers consistent, cost-effective heating, while Raypak’s proven atmospheric burner design ensures stable outdoor performance. With precise digital controls, electronic ignition, and fast heat-up capability, the ASME Series provides dependable, high-output heating for commercial and large residential pool systems across a range of elevations.\u003c\/p\u003e","brand":"Raypak","offers":[{"title":"Default Title","offer_id":52229545427218,"sku":"017378","price":5002.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/DigitalGas_HDR_Raypak_facing_2025-middle_f40ffa11-c59e-4b6b-bb67-63d2fb53e016.png?v=1777438476","url":"https:\/\/www.aquaterrabackyard.com\/products\/raypak-asme-b-r406a-en-c-51-399k-btu-natural-gas-copper-pool-heater","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}