{"product_id":"hayward-w3h135fdn-universal-h-series-natural-gas-135-000-btu-low-nox","title":"Hayward W3H135FDN Universal H-Series Natural Gas 135,000 BTU Low NOx","description":"\u003ch2\u003e\u003cstrong\u003eHayward W3H135FDN Universal H-Series Natural Gas Pool Heater – 135,000 BTU Low NOx\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Hayward Universal H-Series W3H135FDN is a 135,000 BTU natural gas pool heater engineered for efficient, reliable heating of residential in-ground pools and spas. Designed with industry-leading hydraulic performance and energy efficiency, this heater delivers fast heat-up times while helping reduce circulation pump run time.\u003c\/p\u003e\n\u003cp\u003eBuilt with a corrosion-resistant Cupro-Nickel heat exchanger and advanced combustion technology, the Universal H-Series heater provides long-term durability even in saltwater or chemically demanding pool environments. The compact, universal-fit cabinet allows flexible installation on new or existing equipment pads. :contentReference[oaicite:0]{index=0}\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eReliable Heating with Low NOx Emissions\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series Low NOx heater is engineered to meet strict environmental emission standards while maintaining powerful heating performance. Its fan-assisted combustion system ensures consistent heating regardless of wind conditions, while the digital control interface allows precise temperature management and system diagnostics.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e135,000 BTU natural gas heating capacity\u003c\/li\u003e\n\u003cli\u003eUniversal H-Series Low NOx emissions design\u003c\/li\u003e\n\u003cli\u003eCupro-Nickel heat exchanger for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eElectronic ignition with digital control panel\u003c\/li\u003e\n\u003cli\u003eFan-assisted combustion system for consistent performance\u003c\/li\u003e\n\u003cli\u003ePolymer header improves hydraulic performance\u003c\/li\u003e\n\u003cli\u003e2 in x 2.5 in CPVC union plumbing connections\u003c\/li\u003e\n\u003cli\u003eDesigned for residential in-ground pools and spas\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52111417966866,"sku":"W3H135FDN","price":2399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/HPPW3H135FDN_0.jpg?v=1773369270","url":"https:\/\/www.aquaterrabackyard.com\/products\/hayward-w3h135fdn-universal-h-series-natural-gas-135-000-btu-low-nox","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}