{"product_id":"superior-vrt3536-36-vent-free-firebox","title":"Superior VRT3500 36\" Vent-Free Firebox (VRT3536)","description":"\u003cp\u003eThe Superior VRT3536 is a 36\" vent-free gas firebox (Innovative Hearth Products). It offers a 36\" × 28\" opening, with a 20\" installed depth.\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 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\u003eBlower:\u003c\/strong\u003e Optional — FBK-100 (single speed) or FBK-200 (variable speed with wall switch); requires junction box \/ receptacle kit (not included).\u003c\/li\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\u003eInstallation:\u003c\/strong\u003e 20\" depth, hearth extension not required; a raised hearth extension may be used (combustibles allowed, no carpet or vinyl) — base to bottom of firebox opening 5-3\/4\" max.\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 F14-168).\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\u003eVRT3536WS, VRT3536WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalog Numbers\u003c\/td\u003e\n\u003ctd\u003eF0298 \/ F0299\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign Style\u003c\/td\u003e\n\u003ctd\u003eRadiant, smooth-faced (traditional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eVent-Free Gas Firebox (universal firebox enclosure — 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\u003e36\"\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 (may sit directly on a combustible floor; raised platform optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom Use Restrictions\u003c\/td\u003e\n\u003ctd\u003eDo not install in a sleeping room or bathroom; adequate combustion\/ventilation air required (confined-space rules, NFPA 54); not for wood or solid fuel\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 dimensions — 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 for the firebox itself; a 120 VAC, 60 Hz, 1 ph supply and a junction-box\/electrical kit (not provided) are required only if an optional blower kit is installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFireplace Opening (W × H)\u003c\/td\u003e\n\u003ctd\u003e36\" × 28\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterior Firebox Dimensions\u003c\/td\u003e\n\u003ctd\u003eFront width 35\", rear width 23-1\/4\", depth 17-3\/8\", height 28\" (for log-set sizing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Width\u003c\/td\u003e\n\u003ctd\u003e41-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Height\u003c\/td\u003e\n\u003ctd\u003e41-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Depth\u003c\/td\u003e\n\u003ctd\u003e20\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterior\u003c\/td\u003e\n\u003ctd\u003eFull-width, full-height white refractory panels — Stacked (WS) or Herringbone (WH) pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHood\u003c\/td\u003e\n\u003ctd\u003eHeat-deflection hood OPTIONAL (FC36 \/ FC42); when installed it reduces mantel\/trim clearances; only the IHP hood may be used\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScreens\u003c\/td\u003e\n\u003ctd\u003eMesh fire screens included; screens must be closed before operating\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\u003eBlower\u003c\/td\u003e\n\u003ctd\u003eOptional — FBK-100 (single speed) or FBK-200 (variable speed with wall switch); requires junction box \/ receptacle kit (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eTextured powder-coat (black front facing)\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\u003eF14-168\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\u003e240 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e45\" × 22.5\" × 44.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Volume\u003c\/td\u003e\n\u003ctd\u003e26.221 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 gas firebox with white refractory panel set (4 pc) and mesh fire screens with rods\u003c\/li\u003e\n\u003cli\u003eInstallation and operation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eVent-free gas log set\/burner (required), hood, blower kit, junction-box kit, outside-air kit and screen doors 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\u003e42-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming Height\u003c\/td\u003e\n\u003ctd\u003e44-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming Depth\u003c\/td\u003e\n\u003ctd\u003e20-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRough Opening\u003c\/td\u003e\n\u003ctd\u003e42-1\/4\" × 44-1\/4\" × 20-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside Air\u003c\/td\u003e\n\u003ctd\u003eOptional outside air gate \u0026amp; duct kit OAK-UVFRC (4\" duct, right side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform \/ Hearth Requirements\u003c\/td\u003e\n\u003ctd\u003eMay be installed directly on a combustible floor or on a raised platform of appropriate height, fully supported for the full width and depth; on carpeting or vinyl tile use a metal or wood panel the full width and depth of the unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHearth Extension\u003c\/td\u003e\n\u003ctd\u003eNot required; a raised hearth extension may be used (combustibles allowed, no carpet or vinyl) — base to bottom of firebox opening 5-3\/4\" max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorner Installation\u003c\/td\u003e\n\u003ctd\u003eSupported — corner framing dimensions on spec sheet p.1 \/ manual Table 1\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\u003eFloor\u003c\/td\u003e\n\u003ctd\u003e0\" (may sit on a combustible floor; panel required on carpet\/vinyl)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling Clearance\u003c\/td\u003e\n\u003ctd\u003e40\" minimum from the top of the firebox opening to the ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbove Opening (non-combustible zone)\u003c\/td\u003e\n\u003ctd\u003eNon-combustible material (≥1\/2\" thick) required for the first 3\" above the firebox opening; combustible wall allowed above that zone\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 opening 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\u003eNo combustible material closer than 3\" to the firebox opening; projections must stay outside the side-clearance safe zone (e.g. a 5\" projection needs 6\" from the opening)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible Mantel\u003c\/td\u003e\n\u003ctd\u003eCombustible mantel\/trim height increases with projection; two charts — with optional hood (e.g. 4\" projection ⇒ ~13\" above opening) and without hood (e.g. 7\" projection ⇒ ~18–19\" above opening) — see installation manual Figures 4–5\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 dimensions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas supply:\u003c\/strong\u003e 1\/2\" gas line per local code \/ NFPA 54 (access both sides)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional:\u003c\/strong\u003e Heat-deflection hood FC36 \/ FC42 (reduces mantel clearances); FBK-100 \/ FBK-200 blower kits with junction-box kit; OAK-UVFRC outside-air kit; decorative arch screen door kits ASD3628-TI \/ ASD4228-TI; FDVS volcanic stone; touch-up paint\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Superior Fireplaces","offers":[{"title":"Stacked Refractory","offer_id":50497405944047,"sku":"VRT3536WS","price":999.0,"currency_code":"USD","in_stock":true},{"title":"Herringbone Refractory","offer_id":50497405976815,"sku":"VRT3536WH","price":1109.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/5633\/8415\/files\/VRT3500-1_a20bd5ae-33cf-4b9c-afa4-2859b983c29a.jpg?v=1786631433","url":"https:\/\/hearthdepot.com\/products\/superior-vrt3536-36-vent-free-firebox","provider":"Hearth Depot","version":"1.0","type":"link"}