{"product_id":"superior-vrt4550-50-vent-free-firebox","title":"Superior VRT4500 50\" Vent-Free Firebox (VRT4550)","description":"\u003cp\u003eThe Superior VRT4550 is a 50\" vent-free gas firebox in Superior's Custom Series (Innovative Hearth Products). It offers a 50\" × 30\" opening.\u003c\/p\u003e\u003cp\u003eThis listing covers 2 variants — Interior liner. Use the selectors above to configure your unit.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNeed a different size? This series is also available in 36\" and 42\" — use the size selector above to compare all sizes.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired to complete:\u003c\/strong\u003e vent-free gas log set \/ burner (sold separately) — see Installation \u0026amp; Planning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety listed:\u003c\/strong\u003e Listed by PFS Corporation to ANSI Z21.91 Ventless Firebox Enclosures for Gas-Fired Unvented Decorative Room Heaters; approved for use with appliances listed to ANSI Z21.11.2 (report F09-130).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eVRT4550WS, VRT4550WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalog Numbers\u003c\/td\u003e\n\u003ctd\u003eF0281 \/ F0282\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eCustom Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign Style\u003c\/td\u003e\n\u003ctd\u003eTraditional, 30\" tall full-width refractory opening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eVent-Free Universal Gas Firebox (firebox enclosure with refractory panels — no burner or log set of its own)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e50\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eNatural Gas or Propane — determined by the vent-free log set\/burner installed (firebox has no burner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Type\u003c\/td\u003e\n\u003ctd\u003eBuilt-in (zero-clearance framing) or free-standing inside an approved cabinet mantel; may be installed in an aftermarket manufactured (mobile) home where not prohibited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom Use Restrictions\u003c\/td\u003e\n\u003ctd\u003eNot in a bedroom unless the installed log set is rated 10,000 BTU\/h or less (Massachusetts: never in bedrooms or bathrooms); never in a bathroom, recreational vehicle, high-traffic or drafty area; adequate combustion\/ventilation air required (NFPA 54 confined-space rules)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Log Set Input\u003c\/td\u003e\n\u003ctd\u003eListed gas-fired unvented decorative room heater not to exceed 40,000 BTU\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproved Log Sets \/ Burners\u003c\/td\u003e\n\u003ctd\u003eAny ANSI Z21.11.2 listed vent-free (unvented decorative) gas log room heater that meets the firebox minimum size requirements — required, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical\u003c\/td\u003e\n\u003ctd\u003eNo electrical connection required; firebox must be electrically grounded per local code \/ NEC where applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFireplace Opening (W × H)\u003c\/td\u003e\n\u003ctd\u003e50\" × 30\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Width\u003c\/td\u003e\n\u003ctd\u003e59-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Height\u003c\/td\u003e\n\u003ctd\u003e54-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterior\u003c\/td\u003e\n\u003ctd\u003eWhite refractory brick panels — Stacked (WS) or Herringbone (WH) pattern; fully insulated firebox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefractory Hearth Width\u003c\/td\u003e\n\u003ctd\u003e50\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHood\u003c\/td\u003e\n\u003ctd\u003eFirebox hood SUPPLIED and must be used at all times (replacement J4352 36\", J4351 42\", J4350 50\" only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScreens\u003c\/td\u003e\n\u003ctd\u003eMesh fire screens included; firebox must be operated with the supplied screens closed and the supplied hood in place\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVariant Difference\u003c\/td\u003e\n\u003ctd\u003eWS = White Stacked refractory; WH = White Herringbone refractory (same firebox)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eTextured powder-coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eListed by PFS Corporation to ANSI Z21.91 Ventless Firebox Enclosures for Gas-Fired Unvented Decorative Room Heaters; approved for use with appliances listed to ANSI Z21.11.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListing Report No.\u003c\/td\u003e\n\u003ctd\u003eF09-130\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eShipping Information\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e620 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e62.5\" × 32\" × 55\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Volume\u003c\/td\u003e\n\u003ctd\u003e109.1 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cem\u003eShipping figures describe the packed carton, not the installed fireplace.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVent-free universal firebox with white refractory panels (bottom pre-installed; rear, left and right panels with brackets\/retainers)\u003c\/li\u003e\n\u003cli\u003eFirebox hood (must be used at all times)\u003c\/li\u003e\n\u003cli\u003eMesh fire screens with rods\u003c\/li\u003e\n\u003cli\u003eInstallation and operation manual\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eVent-free gas log set\/burner (required), outside-air kits, refractory stain kits and mantels are sold separately.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Planning\u003c\/h2\u003e\u003ch3\u003eFraming \u0026amp; Installation Dimensions\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming Width (minimum opening)\u003c\/td\u003e\n\u003ctd\u003e59-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming Height\u003c\/td\u003e\n\u003ctd\u003e55\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming Depth\u003c\/td\u003e\n\u003ctd\u003e30-1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRough Opening\u003c\/td\u003e\n\u003ctd\u003e59-3\/4\" × 55\" × 30-1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside Air\u003c\/td\u003e\n\u003ctd\u003eOptional outside-air kits — AK4 \/ AK4X (sidewall) or AK4F \/ AK4B (floor); dual left\/right kits available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform \/ Hearth Requirements\u003c\/td\u003e\n\u003ctd\u003eFirebox floor is 0\" to a combustible floor; on carpeting, vinyl tile or other combustible material (other than wood flooring) install on a metal or wood panel extending the full width and depth of the enclosure; firebox must be level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorner Installation\u003c\/td\u003e\n\u003ctd\u003eSupported — corner rough-opening dimensions on spec sheet p.1 (E\/F) \/ manual Figure 9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eClearances to Combustibles\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides \u0026amp; Back\u003c\/td\u003e\n\u003ctd\u003e1-1\/2\" to combustibles at sides and back (not required at the nailing flanges); standoff spacers may touch framing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor\u003c\/td\u003e\n\u003ctd\u003e0\" (panel required on carpet\/vinyl)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling Clearance\u003c\/td\u003e\n\u003ctd\u003e42\" minimum from the top of the firebox opening to the ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront Service Clearance\u003c\/td\u003e\n\u003ctd\u003eCurtains, furniture, clothing or other flammable objects at least 36\" from the front\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Side Wall\u003c\/td\u003e\n\u003ctd\u003e16\" minimum from the side of the firebox to a combustible side wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Mantel Legs \/ Side Trim\u003c\/td\u003e\n\u003ctd\u003eCombustible material protruding from the wall must clear the side of the firebox per the manufacturer chart (e.g. a 3-1\/2\" projection needs 4\"; up to 16\" wall at 12-1\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Mantel\u003c\/td\u003e\n\u003ctd\u003eMantel shelf must stay outside the profile measured from the top of the hood opening: 12\" projection ⇒ 20\" up, 6-3\/4\" ⇒ 16\", 1-1\/2\" ⇒ 12\"; non-combustible material may project above the hood; these clearances replace those supplied with the Z21.11.2 gas logs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Material Restrictions\u003c\/td\u003e\n\u003ctd\u003eCombustible wallboard\/drywall may butt to the sides and top but must never overlap the front facing; non-combustible brick\/tile may overlap the facing (non-combustible mortar\/adhesive) without covering openings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eRequired Components \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent-free gas log set \/ burner (required, sold separately):\u003c\/strong\u003e any ANSI Z21.11.2 listed unvented decorative room heater not exceeding 40,000 BTU\/h that meets the firebox minimum size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas supply:\u003c\/strong\u003e 1\/2\" black iron gas line through either side knockout, per local code \/ NFPA 54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional:\u003c\/strong\u003e Outside-air kits AK4 \/ AK4X (sidewall) or AK4F \/ AK4B (floor); refractory stain kits BSK-CR \/ BSK-RT \/ BSK-CP; cabinet or custom-built mantels\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Superior Fireplaces","offers":[{"title":"Stacked Refractory","offer_id":50497450508527,"sku":"VRT4550WS","price":4089.0,"currency_code":"USD","in_stock":true},{"title":"Herringbone Refractory","offer_id":50497450541295,"sku":"VRT4550WH","price":4189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/5633\/8415\/files\/VRT4500-1_01489896-488e-46fd-a0f3-23a31a4db615.jpg?v=1786631818","url":"https:\/\/hearthdepot.com\/products\/superior-vrt4550-50-vent-free-firebox","provider":"Hearth Depot","version":"1.0","type":"link"}