{"product_id":"jandy-jxi-jxi400nn-natural-gas-pool-spa-heater-399-000-btu-cupronickel","title":"Jandy JXi JXI400NN Natural Gas Pool \u0026 Spa Heater - 399,000 BTU - Cupronickel","description":"\u003cp\u003eThe Jandy JXi JXI400NN is a compact, high-performance natural gas pool and spa heater with 399,000 BTU input and a durable cupronickel heat exchanger for added corrosion resistance.\u003c\/p\u003e\u003ch3\u003eModel details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eModel: JXI400NN\u003c\/li\u003e\n\u003cli\u003eFuel: Natural Gas\u003c\/li\u003e\n\u003cli\u003eInput: 399,000 BTU\u003c\/li\u003e\n\u003cli\u003eHeat exchanger: Cupronickel\u003c\/li\u003e\n\u003cli\u003eCompact 2 ft x 2 ft footprint\u003c\/li\u003e\n\u003cli\u003eDigital controls and Jandy automation compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProfessional installation required.\u003c\/strong\u003e Installation must comply with applicable gas, electrical, venting, plumbing, and local code requirements.\u003c\/p\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. For remote control, verify the listed interface and any required network or automation hardware. 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.jandy.com\/en\/products\/pool-heating\/heaters\/jxi\" target=\"_blank\" rel=\"noopener\"\u003eManufacturer specifications and installation documents\u003c\/a\u003e\u003c\/p\u003e","brand":"Mikan Supply","offers":[{"title":"Default Title","offer_id":44804907663402,"sku":"JXI400NN","price":4296.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/6875\/8570\/files\/heater-jxi400n-epool-2_9b881682-a5c6-4572-b78d-4619bf1d4ac9.png?v=1790308102","url":"https:\/\/mikanpool.com\/products\/jandy-jxi-jxi400nn-natural-gas-pool-spa-heater-399-000-btu-cupronickel","provider":"MIKAN POOL SUPPLIES","version":"1.0","type":"link"}