{"product_id":"pentair-mastertemp-400hd-natural-gas-pool-spa-heater-400-000-btu-460805","title":"Pentair MasterTemp 400HD Natural Gas Pool \u0026 Spa Heater - 400,000 BTU - 460805","description":"\u003cp\u003e\u003cstrong\u003eWater connection unions included:\u003c\/strong\u003e Includes the manufacturer's unions for connecting the water inlet and outlet. Additional piping and installation materials depend on your pool setup.\u003c\/p\u003e\u003cp\u003ePentair MasterTemp 400HD high-performance pool and spa heater, model 460805. Heavy-duty 400,000 BTU natural gas model with a cupro-nickel heat exchanger, compact design and user-friendly controls.\u003c\/p\u003e\u003ch3\u003eModel details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHeating capacity: 400,000 BTU\u003c\/li\u003e\n\u003cli\u003eFuel: Natural Gas\u003c\/li\u003e\n\u003cli\u003eHeavy-Duty (HD) cupro-nickel heat exchanger\u003c\/li\u003e\n\u003cli\u003eFor pool and spa applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFuel and heater sizing\u003c\/h3\u003e\u003cp\u003eThis is the natural gas configuration. Confirm that your supply matches before ordering. Gas-heater BTU input is the fuel input rating; usable heat output also depends on thermal efficiency. Pool volume, starting water temperature, desired warm-up time and heat loss determine the capacity needed.\u003c\/p\u003e\u003ch3\u003eInstallation requirements\u003c\/h3\u003e\u003cp\u003eA qualified installer should confirm gas-line capacity and pressure, electrical supply, water flow, equipment clearances and installation altitude. Indoor installations need the correct manufacturer-approved venting arrangement. Check the existing pad and plumbing connection positions when replacing another heater; matching BTU size alone does not guarantee a direct fit.\u003c\/p\u003e\u003ch3\u003eComplete the installation\u003c\/h3\u003e\u003cp\u003eSite-specific gas fittings, electrical work, venting accessories and installation labor are separate.  Maintain the manufacturer's water-balance targets and keep the circulation system in good condition to protect the heat exchanger.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.pentair.com\/en-us\/pool-spa\/products\/heaters-heat-pumps\/mastertemp-high-performance-heater.html\" target=\"_blank\" rel=\"noopener\"\u003eManufacturer specifications and installation documents\u003c\/a\u003e\u003c\/p\u003e","brand":"Mikan Supply","offers":[{"title":"Default Title","offer_id":44799245320234,"sku":"PUR-15-0805","price":4899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/6875\/8570\/files\/heater-master-official-0_bd823d4f-d917-459d-9199-8f606031c781.png?v=1790308364","url":"https:\/\/mikanpool.com\/products\/pentair-mastertemp-400hd-natural-gas-pool-spa-heater-400-000-btu-460805","provider":"MIKAN POOL SUPPLIES","version":"1.0","type":"link"}