{"product_id":"hayward-universal-h-series-low-nox-induced-draft-pool-spa-heater-350-000-btu-natural-gas-h350fdn","title":"Hayward Universal H-Series Low NOx Induced Draft Pool and Spa Heater, 350,000 BTU Natural Gas, H350FDN","description":"\u003cp\u003eThe Hayward H350FDN is the 350,000 BTU natural gas model in the Universal H-Series, Hayward standard gas heater line for pools and spas. It is a low NOx, induced draft heater.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere this size fits\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e350,000 BTU sits at the larger end of the H-Series. It suits bigger pools, pool and spa combinations where the spa has to come up to temperature quickly, and installations in cooler climates where heat loss is constant. Sizing depends on pool volume, exposure and how quickly you want to recover, so let your installer confirm the number against your pool.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation notes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is the natural gas version, so it needs a natural gas supply with the right pipe size and pressure. Induced draft heaters have their own venting requirements, and gas heater installation is licensed work in most places. The heater ships by freight.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48641951695060,"sku":"HAY-15-731","price":2683.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_04f8f037-4a36-4b5c-91a9-6f1a54dfc283.gif?v=1788899912","url":"https:\/\/www.activepoolsupply.com\/products\/hayward-universal-h-series-low-nox-induced-draft-pool-spa-heater-350-000-btu-natural-gas-h350fdn","provider":"Active Pool Supply","version":"1.0","type":"link"}