{"product_id":"hayward-hdf400-dual-fuel-heater","title":"Hayward HDF400 Universal HC Pool \u0026 Spa Heater – 400K BTU Dual-Fuel, Energy-Efficient, Low NOx","description":"\u003cp\u003eBuilt by Hayward, this Universal HC Pool \u0026amp; Spa Heater is a trusted pick for pool owners and service pros alike.\u003c\/p\u003e\n\u003cp\u003eThe Hayward HDF400 Universal HC Pool \u0026amp; Spa Heater delivers powerful, energy-efficient heating with a 400,000 BTU output, making it ideal for large residential pools and spas. Featuring a dual-fuel design, this heater provides flexible installation options while maintaining trustworthy and consistent water temperatures.\u003c\/p\u003e\n\u003cp\u003eEngineered with low NOx technology, the HDF400 meets strict emissions standards without sacrificing performance. Its compact, universal design allows for easy replacement of existing heaters, while the cupro-nickel heat exchanger ensures superior durability and corrosion resistance—even in demanding pool environments.\u003c\/p\u003e\n\u003cp\u003eBacked by Hayward's reputation for quality, this Universal HC Pool \u0026amp; Spa Heater ships fast and installs easily.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":53980816048492,"sku":"HDF400","price":3899.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/0872\/2796\/files\/ProductImage_2.png?v=1782863489","url":"https:\/\/poolsupplyharbor.com\/products\/hayward-hdf400-dual-fuel-heater","provider":"Pool Supply Harbor","version":"1.0","type":"link"}