{"product_id":"heatstar-20-000-btu-vent-free-blue-flame-heater","title":"Heatstar 20,000 BTU Vent Free Blue Flame Heater","description":"\u003cp\u003eCold back bedrooms and detached garages are exactly what the HeatStar 20,000 BTU Vent Free Blue Flame Heater is meant to fix, without adding a chimney or ductwork. Blue flame convection heats the air in the room rather than the objects in it, and because the burner runs on gas, warmth keeps coming when the power goes out (the blower fan pauses until it returns). Offered in propane or natural gas, the line matches whichever fuel already serves the space.\u003c\/p\u003e\n\u003ch2\u003eKey Features and Benefits of the HeatStar 20,000 BTU Vent Free Blue Flame Heater\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Output:\u003c\/strong\u003e The 20,000 BTU heater provides supplemental warmth for rooms in the 301 to 500 square feet range that your central system struggles to reach.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Efficiency:\u003c\/strong\u003e Vent-free combustion keeps nearly all fuel energy in the room, operating at 99.9 percent efficiency.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple Settings:\u003c\/strong\u003e The manual thermostat knob gives you five settings and modulates the flame as the room nears your target, cycling the burner off once it arrives.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Blower:\u003c\/strong\u003e A 110-120 volt blower fan pushes heated air outward, so warmth reaches the far corners faster than convection alone would carry it.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOxygen Safety Sensor:\u003c\/strong\u003e A built-in low-oxygen shut-off sensor cuts the gas if oxygen in the room drops, the key safeguard for running a flueless heater indoors.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePush-Button Ignition:\u003c\/strong\u003e Electronic push-button ignition fires the burner using the included AA batteries, so you can light it during an outage without an outlet.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBracket And Feet:\u003c\/strong\u003e A wall-mount bracket and base feet both ship in the box, giving you two installation options depending on where your gas line lands.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize And Weight:\u003c\/strong\u003e The heater measures 24 x 20 x 8 inches (H x W x D) and weighs 27 pounds, so once installed it stays clear of walkways.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Certified:\u003c\/strong\u003e Certified to ANSI and CSA standards, so the burner and shut-off design have passed independent testing before it goes on your wall.\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eChoose Your Fuel Type\u003c\/h2\u003e\n\u003cp\u003eFuel supply is the one axis that varies, so take the version that matches the gas already serving the room: liquid propane or natural gas.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid Propane (HSSVFBF20LPBT):\u003c\/strong\u003e Burns liquid propane, making it suited to cabins and rural properties with a tank-fed supply.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural Gas (HSSVFBF20NGBT):\u003c\/strong\u003e Connects to a utility natural gas line, so a home already piped for gas can feed the heater directly from existing service.\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSylvane's Expert Take\u003c\/h2\u003e\n\u003cp\u003eChoose this blue flame heater to add steady supplemental heat to a well-insulated room, where heated air stays put and keeps you comfortable longer. It performs well in cabins and garages, as well as rooms at the end of a long duct run. Expect a few extra minutes before you feel the warmth compared with a radiant model because the air heats first. Fuel choice is the only real decision here, and it changes nothing about the heat output, so let the supply already at the wall settle it.\u003c\/p\u003e","brand":"HeatStar","offers":[{"title":"Propane","offer_id":45545720217686,"sku":"he18949","price":279.0,"currency_code":"USD","in_stock":true},{"title":"Natural Gas","offer_id":45545720250454,"sku":"he18950","price":389.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/7135\/4966\/files\/heatstar-20000-btu-vent-free-blue-flame-heater-main.png?v=1787181500","url":"https:\/\/www.sylvane.com\/products\/heatstar-20-000-btu-vent-free-blue-flame-heater","provider":"Sylvane","version":"1.0","type":"link"}