{"product_id":"017707-raypak-337a-digital-low-nox-asme-pool-heater","title":"Raypak 017707 337A Digital Low NOx ASME Pool Heater","description":"\u003ch2 data-start=\"327\" data-end=\"382\"\u003e\u003cstrong\u003eRaypak 337A Digital Low NOx ASME Pool \u0026amp; Spa Heater\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cimg style=\"width: 1300px; height: 600;\" alt=\"Product Photo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/017705_Raypak_207A_Digital_Low_NOx_ASME_Pool_Heater_Banners_1.jpg?v=1760373851%3E%3C\/p%3E%3Cdiv%20style=\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"384\" data-end=\"874\"\u003eThe Raypak 337A Digital Low NOx ASME Gas Pool \u0026amp; Spa Heater is engineered for large residential pools, spas, and commercial systems that require powerful heating paired with reliable durability. With an input rate of 332 MBTU\/h and 82% thermal efficiency, this model is designed to deliver strong performance while keeping long-term energy consumption under control. Certified to meet ASME commercial standards, it provides the level of quality and compliance pool professionals depend on.\u003c\/p\u003e\n\u003cp data-start=\"876\" data-end=\"1421\"\u003eDurability is central to the 337A’s construction. The heater is housed in a galvanized metal cabinet that protects against harsh outdoor conditions, while heavy-duty bronze ASME headers ensure strength in demanding installations. A copper or cupronickel straight-tube heat exchanger reduces internal stress by eliminating unnecessary bends, improving overall reliability. Raypak’s \u003cstrong data-start=\"1257\" data-end=\"1281\"\u003eProTek Shield module\u003c\/strong\u003e further enhances longevity by absorbing corrosive elements, protecting the exchanger in both saltwater and chlorinated pool environments.\u003c\/p\u003e\n\u003cp data-start=\"1423\" data-end=\"1906\"\u003eEase of operation is ensured with digital microprocessor controls that allow precise temperature management and smooth integration into automated systems. A self-adjusting burner compensates for fluctuations in gas pressure to maintain a clean, efficient burn, while the low-profile design supports both indoor and outdoor installations. With its balance of strength, performance, and efficiency, the Raypak 337A is built to serve larger pools and spas with consistent reliability.\u003c\/p\u003e\n\u003ch2 data-start=\"1908\" data-end=\"1965\"\u003e\u003cstrong\u003eKey Features of the Raypak 337A ASME Low NOx Heater\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1967\" data-end=\"3637\"\u003e\n\u003cli data-start=\"1967\" data-end=\"2126\"\u003e\n\u003cp data-start=\"1969\" data-end=\"2126\"\u003e\u003cstrong data-start=\"1969\" data-end=\"1997\"\u003eInput Rate – 332 MBTU\/h:\u003c\/strong\u003e Provides ample heating capacity for larger pools, spas, and light commercial systems, ensuring dependable temperature control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2127\" data-end=\"2254\"\u003e\n\u003cp data-start=\"2129\" data-end=\"2254\"\u003e\u003cstrong data-start=\"2129\" data-end=\"2156\"\u003e82% Thermal Efficiency:\u003c\/strong\u003e Maintains strong heating performance while helping to reduce ongoing operating costs over time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2255\" data-end=\"2398\"\u003e\n\u003cp data-start=\"2257\" data-end=\"2398\"\u003e\u003cstrong data-start=\"2257\" data-end=\"2282\"\u003eASME-Certified Build:\u003c\/strong\u003e Bronze headers and high-grade components ensure compliance with commercial codes and provide reliable durability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2399\" data-end=\"2543\"\u003e\n\u003cp data-start=\"2401\" data-end=\"2543\"\u003e\u003cstrong data-start=\"2401\" data-end=\"2423\"\u003eLow NOx Certified:\u003c\/strong\u003e Designed with a blower and gas valve system that optimizes combustion, meeting environmental air-quality regulations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2544\" data-end=\"2693\"\u003e\n\u003cp data-start=\"2546\" data-end=\"2693\"\u003e\u003cstrong data-start=\"2546\" data-end=\"2587\"\u003eCopper or Cupronickel Heat Exchanger:\u003c\/strong\u003e Straight-tube exchanger design improves durability and supports both chlorinated and saltwater systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2694\" data-end=\"2844\"\u003e\n\u003cp data-start=\"2696\" data-end=\"2844\"\u003e\u003cstrong data-start=\"2696\" data-end=\"2721\"\u003eProTek Shield Module:\u003c\/strong\u003e Protects the heat exchanger by absorbing corrosive elements, extending the heater’s service life under harsh conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2845\" data-end=\"2974\"\u003e\n\u003cp data-start=\"2847\" data-end=\"2974\"\u003e\u003cstrong data-start=\"2847\" data-end=\"2873\"\u003eSelf-Adjusting Burner:\u003c\/strong\u003e Adapts automatically to gas pressure changes, maintaining steady, safe, and efficient performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2975\" data-end=\"3110\"\u003e\n\u003cp data-start=\"2977\" data-end=\"3110\"\u003e\u003cstrong data-start=\"2977\" data-end=\"3004\"\u003eDigital Control System:\u003c\/strong\u003e Microprocessor thermostat with a user-friendly interface, fully compatible with remote pool automation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3111\" data-end=\"3250\"\u003e\n\u003cp data-start=\"3113\" data-end=\"3250\"\u003e\u003cstrong data-start=\"3113\" data-end=\"3144\"\u003eDurable Galvanized Cabinet:\u003c\/strong\u003e Rugged exterior provides resistance to weather and corrosion, ensuring dependable operation year-round.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3251\" data-end=\"3384\"\u003e\n\u003cp data-start=\"3253\" data-end=\"3384\"\u003e\u003cstrong data-start=\"3253\" data-end=\"3294\"\u003eFlexible Indoor\/Outdoor Installation:\u003c\/strong\u003e Compact profile supports a variety of placement options across different system setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3385\" data-end=\"3504\"\u003e\n\u003cp data-start=\"3387\" data-end=\"3504\"\u003e\u003cstrong data-start=\"3387\" data-end=\"3419\"\u003e120\/240VAC, 1-Phase Voltage:\u003c\/strong\u003e Designed to work with standard electrical setups for straightforward installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3505\" data-end=\"3637\"\u003e\n\u003cp data-start=\"3507\" data-end=\"3637\"\u003e\u003cstrong data-start=\"3507\" data-end=\"3540\"\u003eMaximum Water Flow – 100 GPM:\u003c\/strong\u003e Handles high circulation rates to support larger pool and spa systems with consistent heating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg style=\"width: 1300px; height: 600;\" alt=\"Product Photo\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/017705_Raypak_207A_Digital_Low_NOx_ASME_Pool_Heater_Banners_2.jpg?v=1760373851\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;\"\u003e\n\u003ch2 style=\"text-align: left;\"\u003e\n\u003cstrong\u003eDigital Low NOx ASME 207A Specifications\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c!-- PRODUCT SPECS INLINE UNDER TITLE --\u003e\n\u003cdiv class=\"product-specs-row\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 337A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Rate:\u003c\/strong\u003e 332 MBTU\/h\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Efficiency:\u003c\/strong\u003e 82%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndoor \u0026amp; Outdoor:\u003c\/strong\u003e ASME\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy Type:\u003c\/strong\u003e Gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVenting:\u003c\/strong\u003e Category I\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120\/240VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 1-Phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Water Flow:\u003c\/strong\u003e 100 GPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Raypak","offers":[{"title":"Default Title","offer_id":54367298060579,"sku":"017707","price":4711.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/0987\/5235\/files\/Raypak017706267ADigitalLowNOxASMEPoolHeaterWholesalePoolMart_1.jpg?v=1766000131","url":"https:\/\/wholesalepoolmart.com\/products\/017707-raypak-337a-digital-low-nox-asme-pool-heater","provider":"Wholesale Pool Mart","version":"1.0","type":"link"}