{"product_id":"superior-highridge-birch-18-vent-free-gas-logs","title":"Superior Highridge Birch 18\" Nature-Flame Vent-Free Gas Log Set","description":"\u003cstyle\u003e\nhtml{scroll-behavior:smooth}\n\n.fa-product-page{\n  --fa-primary:#313652;\n  --fa-gold:#e6ba43;\n  --fa-yellow:#ffe001;\n  --fa-red:#da1816;\n  --fa-green:#4d713d;\n  --fa-light:#f7f7f9;\n  --fa-muted:#62677a;\n  --fa-border:rgba(49,54,82,.14);\n  box-sizing:border-box;\n  max-width:1710px;\n  margin:0 auto;\n  padding:30px 18px;\n  color:#1f2433;\n  background:#fff;\n  font-family:\"DM Sans\",system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",sans-serif;\n  font-size:16px;\n  line-height:1.7\n}\n\n.fa-product-page *,\n.fa-product-page *::before,\n.fa-product-page *::after{\n  box-sizing:inherit\n}\n\n.fa-product-page p{\n  margin:0 0 16px\n}\n\n.fa-product-page ul,\n.fa-product-page ol{\n  margin:0;\n  padding-left:22px\n}\n\n.fa-product-page li{\n  margin-bottom:8px\n}\n\n.fa-product-page a{\n  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font-size:24px\n  }\n\n  .fa-quick-specs{\n    grid-template-columns:1fr\n  }\n\n  .fa-faq-answer{\n    padding-left:0\n  }\n\n  .fa-jump-nav{\n    display:block\n  }\n\n  .fa-jump-nav strong{\n    display:block;\n    margin-bottom:8px\n  }\n\n  .fa-jump-nav a{\n    margin:0 5px 7px 0\n  }\n\n  .fa-spec-table:not(.fa-wide-table){\n    min-width:0\n  }\n\n  .fa-wide-table{\n    min-width:620px\n  }\n}\n\u003c\/style\u003e\n\u003carticle class=\"fa-product-page\"\u003e\u003cheader class=\"fa-hero\"\u003e\u003cspan class=\"fa-product-label\"\u003eSuperior Highridge Birch Nature-Flame Gas Logs\u003c\/span\u003e\n\u003ch2\u003eSuperior Highridge Birch 18\" Nature-Flame Vent-Free Gas Log Set\u003c\/h2\u003e\n\u003cp class=\"fa-hero-description\"\u003eThe \u003cstrong\u003eSuperior Highridge Birch 18\" Nature-Flame Vent-Free Gas Log Set\u003c\/strong\u003e combines detailed birch-style concrete cast refractory logs with Superior's Nature-Flame burner system for tall natural-yellow flames, a flickering ember bed, and a traditional fireplace presentation. Available in \u003cstrong\u003eNatural Gas or Propane\/LP\u003c\/strong\u003e configurations with \u003cstrong\u003emillivolt or electronic controls\u003c\/strong\u003e, the 18-inch system provides up to \u003cstrong\u003e30,000 BTU\/hr\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"fa-quick-specs\"\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eLog Size\u003c\/strong\u003e 18\"\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eBurner Size\u003c\/strong\u003e 18\"\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eMaximum Input\u003c\/strong\u003e Up to 30,000 BTU\/hr\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eHeating Efficiency\u003c\/strong\u003e 99%\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eFuel\u003c\/strong\u003e Natural Gas \/ Propane-LP\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eControls\u003c\/strong\u003e Millivolt \/ Electronic\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eMinimum Firebox\u003c\/strong\u003e 26\"W Front × 17\"W Rear × 17\"H × 15\"D\u003c\/div\u003e\n\u003cdiv class=\"fa-quick-spec\"\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e 5-Year Limited\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/header\u003e\u003cnav class=\"fa-jump-nav\"\u003e\u003cstrong\u003eJump to:\u003c\/strong\u003e \u003ca href=\"#fa-before-buy\"\u003eBefore You Buy\u003c\/a\u003e \u003ca href=\"#fa-fit\"\u003eFit\u003c\/a\u003e \u003ca href=\"#fa-features\"\u003eFeatures\u003c\/a\u003e \u003ca href=\"#fa-fuel-controls\"\u003eFuel \u0026amp; Controls\u003c\/a\u003e \u003ca href=\"#fa-compatibility\"\u003eCompatibility\u003c\/a\u003e \u003ca href=\"#fa-installation\"\u003eInstallation\u003c\/a\u003e \u003ca href=\"#fa-specifications\"\u003eSpecifications\u003c\/a\u003e \u003ca href=\"#fa-downloads\"\u003eManuals\u003c\/a\u003e \u003ca href=\"#fa-faq\"\u003eFAQs\u003c\/a\u003e\u003c\/nav\u003e\n\u003csection class=\"fa-section\" id=\"fa-before-buy\"\u003e\n\u003ch2\u003eBefore You Buy\u003c\/h2\u003e\n\u003cdiv class=\"fa-decision-box\"\u003e\n\u003cdiv class=\"fa-decision-panel fa-best-for\"\u003e\n\u003ch3\u003eVerify These First\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour usable firebox measures at least \u003cstrong\u003e26\" front width × 17\" rear width × 17\" height × 15\" depth\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eYou have selected the correct \u003cstrong\u003eNatural Gas or Propane\/LP\u003c\/strong\u003e configuration.\u003c\/li\u003e\n\u003cli\u003eYou have selected the appropriate \u003cstrong\u003emillivolt or electronic\u003c\/strong\u003e control system.\u003c\/li\u003e\n\u003cli\u003eThe fireplace type is compatible with Superior's installation requirements.\u003c\/li\u003e\n\u003cli\u003eAdequate combustion and ventilation air can be provided for the intended installation.\u003c\/li\u003e\n\u003cli\u003eVent-free operation is permitted and appropriate, or the fireplace can satisfy the applicable vented-use requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-decision-panel fa-not-for\"\u003e\n\u003ch3\u003eDo Not Assume\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThat every fireplace wider than 18\" will accommodate the system.\u003c\/li\u003e\n\u003cli\u003eThat Natural Gas and Propane\/LP configurations can be field-converted.\u003c\/li\u003e\n\u003cli\u003eThat every wood-burning fireplace permits unvented gas logs.\u003c\/li\u003e\n\u003cli\u003eThat millivolt and electronic configurations include the same controls.\u003c\/li\u003e\n\u003cli\u003eThat a damper clamp or optional millivolt controls are automatically included.\u003c\/li\u003e\n\u003cli\u003eThat Highridge Birch logs can be freely rearranged.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-alert fa-alert-danger\"\u003e\n\u003cstrong\u003eFuel configurations are model-specific:\u003c\/strong\u003e The appliance is equipped for the fuel type stated on its rating plate. Do not field-convert between Natural Gas and Propane\/LP.\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\"\u003e\n\u003ch2\u003eHighridge Birch 18\" Overview\u003c\/h2\u003e\n\u003cp class=\"fa-section-intro\"\u003eHighridge Birch is designed for homeowners who prefer the distinctive lighter appearance of birch while retaining the flame movement, ember glow, and supplemental heating capability of Superior's Nature-Flame gas log platform.\u003c\/p\u003e\n\u003cp\u003eThe concrete cast refractory logs reproduce natural wood-grain texture, bark characteristics, lighter birch coloration, and distinctive markings. The log design creates a fireplace focal point whether the appliance is operating or turned off.\u003c\/p\u003e\n\u003cp\u003eSuperior's Nature-Flame pan burner pairs the logs with tall natural-yellow flames, varied flame movement, a flickering ember bed, and a wood-burning-style grate presentation.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\"\u003e\n\u003ch2\u003eSuperior Highridge Birch 18\" at a Glance\u003c\/h2\u003e\n\u003cdiv class=\"fa-grid\"\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eProduct Type\u003c\/span\u003e\n\u003cp class=\"fa-card-value\"\u003eVent-Free Gas Log Set\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eLog Style\u003c\/span\u003e\n\u003cp class=\"fa-card-value\"\u003eHighridge Birch\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eLog Material\u003c\/span\u003e\n\u003cp class=\"fa-card-value\"\u003eConcrete \/ Cast Refractory\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eFuel Options\u003c\/span\u003e\n\u003cp class=\"fa-card-value\"\u003eNatural Gas or Propane\/LP\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eControl Options\u003c\/span\u003e\n\u003cp class=\"fa-card-value\"\u003eMillivolt or Electronic\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eVented Application\u003c\/span\u003e\n\u003cp class=\"fa-card-value\"\u003eYes, with required damper clamp sold separately\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-fit\"\u003e\n\u003ch2\u003eFirebox Fit Requirements\u003c\/h2\u003e\n\u003cp class=\"fa-section-intro\"\u003eAn 18-inch log-set designation does not mean every fireplace with an opening wider than 18 inches is suitable. The usable interior must satisfy all four minimum dimensions.\u003c\/p\u003e\n\u003cdiv class=\"fa-table-wrap\"\u003e\n\u003ctable class=\"fa-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFirebox Measurement\u003c\/th\u003e\n\u003cth\u003eMinimum Required\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFront Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e26\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-alert\"\u003e\n\u003cstrong\u003eMeasure the usable interior.\u003c\/strong\u003e Do not use the exterior opening, decorative surround, mantel opening, or overall fireplace dimensions as a substitute for usable firebox measurements.\u003c\/div\u003e\n\u003cdiv class=\"fa-alert fa-alert-danger\"\u003e\u003cstrong\u003eDo not install the 18\" Nature-Flame system if any firebox measurement is smaller than the stated minimum.\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-features\"\u003e\n\u003ch2\u003eKey Highridge Birch \u0026amp; Nature-Flame Features\u003c\/h2\u003e\n\u003cdiv class=\"fa-grid\"\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eBirch-Style Appearance\u003c\/span\u003e\n\u003cp\u003eDetailed lighter-colored logs reproduce birch grain, bark characteristics, coloration, and distinctive markings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eNature-Flame Pan Burner\u003c\/span\u003e\n\u003cp\u003eThe burner creates tall natural-yellow flames with varied flame movement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eFlickering Ember Bed\u003c\/span\u003e\n\u003cp\u003eThe ember-bed effect adds glow and depth beneath the birch-style log presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eTraditional Grate Appearance\u003c\/span\u003e\n\u003cp\u003eA wood-burning-style grate complements the logs and flame presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003e99% Heating Efficiency\u003c\/span\u003e\n\u003cp\u003eThe Nature-Flame series is heater rated at 99% heating efficiency for vent-free operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003cspan class=\"fa-card-label\"\u003eSupplemental Heating\u003c\/span\u003e\n\u003cp\u003eThe system is intended to provide supplemental heat and should not be used as the home's primary heating system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHighridge Birch Log Placement\u003c\/h3\u003e\n\u003cp\u003eThe Highridge Birch logs must be installed in the \u003cstrong\u003especific positions established by Superior\u003c\/strong\u003e. They are not intended to be freely rearranged according to personal preference.\u003c\/p\u003e\n\u003cp\u003eCorrect log positioning helps maintain the intended flame pattern and combustion characteristics.\u003c\/p\u003e\n\u003cdiv class=\"fa-alert fa-alert-danger\"\u003e\n\u003cstrong\u003eDo not alter the prescribed log or ember arrangement.\u003c\/strong\u003e Do not place ember material over burner ports. Refer to the dedicated Highridge Birch Concrete Log Placement Guide before installing or repositioning the logs.\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-fuel-controls\"\u003e\n\u003ch2\u003eFuel, Control \u0026amp; BTU Configuration\u003c\/h2\u003e\n\u003cp class=\"fa-section-intro\"\u003eThe Highridge Birch 18\" does not have one universal input rating. Fuel type and control type determine the applicable BTU range and available control features.\u003c\/p\u003e\n\u003cdiv class=\"fa-grid-2\"\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003ch3\u003eNatural Gas\u003c\/h3\u003e\n\u003cp\u003eSelect only the configuration designed for an approved Natural Gas supply.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003ch3\u003ePropane \/ LP\u003c\/h3\u003e\n\u003cp\u003eSelect only the configuration designed for an approved Propane\/LP supply.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003ch3\u003eMillivolt Control\u003c\/h3\u003e\n\u003cp\u003eThe millivolt Nature-Flame configuration is \u003cstrong\u003eremote ready\u003c\/strong\u003e. Compatible optional remote or wall-mounted controls can be selected according to the desired operating method.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-card fa-card-accent\"\u003e\n\u003ch3\u003eElectronic Control\u003c\/h3\u003e\n\u003cp\u003eThe electronic configuration includes the \u003cstrong\u003eEcoFlow Touch Screen Multi-Function Remote\u003c\/strong\u003e with Manual and Thermostat modes, On\/Off operation, and three flame-height settings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-alert fa-alert-danger\"\u003e\n\u003cstrong\u003eDo not field-convert fuel types.\u003c\/strong\u003e Order the appliance configuration that matches the actual gas supply at the installation location.\u003c\/div\u003e\n\u003ch3\u003eHighridge Birch 18\" BTU Ratings\u003c\/h3\u003e\n\u003cdiv class=\"fa-table-wrap\"\u003e\n\u003ctable class=\"fa-spec-table fa-wide-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eControl\u003c\/th\u003e\n\u003cth\u003eFuel\u003c\/th\u003e\n\u003cth\u003eInput Rating\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMillivolt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e21,000–30,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMillivolt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePropane\/LP\u003c\/td\u003e\n\u003ctd\u003e21,000–29,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectronic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e22,000–30,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectronic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePropane\/LP\u003c\/td\u003e\n\u003ctd\u003e22,000–30,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-alert\"\u003e\n\u003cstrong\u003eUse the exact configuration rating.\u003c\/strong\u003e Do not apply the 30,000 BTU\/hr maximum as the full operating range for every fuel and control combination.\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-compatibility\"\u003e\n\u003ch2\u003eFireplace \u0026amp; Venting Compatibility\u003c\/h2\u003e\n\u003cp class=\"fa-section-intro\"\u003eThe Highridge Birch Nature-Flame system cannot be installed in every fireplace. Fireplace construction, firebox dimensions, clearances, fuel supply, combustion air, and applicable restrictions must all be verified.\u003c\/p\u003e\n\u003ch3\u003eCompatible Fireplace Types\u003c\/h3\u003e\n\u003cp\u003eThe system is intended for an appropriate \u003cstrong\u003esolid-fuel-burning masonry fireplace\u003c\/strong\u003e, qualifying \u003cstrong\u003eUL127 factory-built fireplace\u003c\/strong\u003e, or applicable \u003cstrong\u003elisted ventless firebox\u003c\/strong\u003e that satisfies Superior's installation requirements.\u003c\/p\u003e\n\u003cdiv class=\"fa-alert fa-alert-danger\"\u003e\n\u003cstrong\u003eFactory-built fireplace restriction:\u003c\/strong\u003e Do not install the appliance in a factory-built fireplace if that fireplace's instructions state that it has not been tested or should not be used with unvented gas logs.\u003c\/div\u003e\n\u003ch3\u003eVent-Free Operation\u003c\/h3\u003e\n\u003cp\u003eDuring vent-free operation, the appliance uses air from the installation space for combustion rather than relying on a conventional chimney to exhaust the appliance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdequate combustion and ventilation air is required.\u003c\/strong\u003e Use the applicable Superior installation manual to determine whether the installation area meets the required conditions.\u003c\/p\u003e\n\u003cdiv class=\"fa-alert\"\u003e\n\u003cstrong\u003eLocal restrictions may apply.\u003c\/strong\u003e Vent-free appliances can be subject to state, local, or installation-specific requirements.\u003c\/div\u003e\n\u003ch3\u003eVented Operation\u003c\/h3\u003e\n\u003cp\u003eThe Nature-Flame series is also listed for qualifying vented fireplace applications.\u003c\/p\u003e\n\u003cp\u003eFor applicable vented operation, a \u003cstrong\u003edamper clamp is required\u003c\/strong\u003e to prevent the chimney damper from closing completely and to maintain the required permanent flue opening. The damper clamp is sold separately.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\"\u003e\n\u003ch2\u003eCompatible Controls \u0026amp; Accessories\u003c\/h2\u003e\n\u003cp class=\"fa-section-intro\"\u003eAccessory compatibility depends on the selected burner and control configuration. Confirm compatibility before ordering any optional accessory.\u003c\/p\u003e\n\u003cdiv class=\"fa-table-wrap\"\u003e\n\u003ctable class=\"fa-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessory\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRCKIT4001\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMillivolt On\/Off Remote Control Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTRC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermostat Remote Control Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGWMT1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall-Mount Thermostat Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGA6050\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFireplace Hood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGA6080\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDamper Clamp for applicable vented installations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-alert\"\u003e\n\u003cstrong\u003eMillivolt control distinction:\u003c\/strong\u003e RCKIT4001, TRC, and GWMT1 are compatible control options identified by Superior, but optional controls may be sold separately.\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-installation\"\u003e\n\u003ch2\u003eInstallation \u0026amp; Safety Requirements\u003c\/h2\u003e\n\u003cp\u003eInstallation and gas connection must follow the applicable Superior installation manual and all applicable requirements. The manufacturer specifies installation and service by a \u003cstrong\u003equalified installer or service person\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"fa-decision-box\"\u003e\n\u003cdiv class=\"fa-decision-panel fa-best-for\"\u003e\n\u003ch3\u003eVerify Before Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe correct Natural Gas or Propane\/LP configuration.\u003c\/li\u003e\n\u003cli\u003eThe correct millivolt or electronic burner configuration.\u003c\/li\u003e\n\u003cli\u003eAll minimum firebox dimensions.\u003c\/li\u003e\n\u003cli\u003eRequired clearances.\u003c\/li\u003e\n\u003cli\u003eAdequate combustion and ventilation air.\u003c\/li\u003e\n\u003cli\u003eGas-supply requirements.\u003c\/li\u003e\n\u003cli\u003eFireplace compatibility.\u003c\/li\u003e\n\u003cli\u003eApplicable codes and installation requirements.\u003c\/li\u003e\n\u003cli\u003eCorrect Highridge Birch log placement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-decision-panel fa-not-for\"\u003e\n\u003ch3\u003eDo Not\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperate with an incorrect fuel configuration.\u003c\/li\u003e\n\u003cli\u003eUse an unapproved or incompatible fireplace.\u003c\/li\u003e\n\u003cli\u003eOperate with an incorrect log arrangement.\u003c\/li\u003e\n\u003cli\u003eBlock burner ports with ember material.\u003c\/li\u003e\n\u003cli\u003eIgnore required combustion or ventilation air.\u003c\/li\u003e\n\u003cli\u003eUse an open flame to test gas connections for leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-alert fa-alert-danger\"\u003e\n\u003cstrong\u003eGas-leak testing:\u003c\/strong\u003e Gas connections must be checked using an approved method. Never use an open flame to check for gas leaks.\u003c\/div\u003e\n\u003cp\u003eThe appliance and logs become hot during operation. Maintain required clearances, keep combustible materials away, and make children and adults aware of hot-surface hazards.\u003c\/p\u003e\n\u003cp\u003eInspection and maintenance of the burner, pilot, and flame appearance should be performed according to the applicable manufacturer instructions.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-specifications\"\u003e\n\u003ch2\u003eSuperior Highridge Birch 18\" Specifications\u003c\/h2\u003e\n\u003cdiv class=\"fa-table-wrap\"\u003e\n\u003ctable class=\"fa-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"fa-spec-group-row\"\u003e\n\u003cth colspan=\"2\"\u003eProduct\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSuperior Fireplaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNature-Flame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLog Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHighridge Birch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVent-Free Gas Log Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"fa-spec-group-row\"\u003e\n\u003cth colspan=\"2\"\u003eConstruction \u0026amp; Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLog Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBurner Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLog Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConcrete \/ Cast Refractory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"fa-spec-group-row\"\u003e\n\u003cth colspan=\"2\"\u003eFuel, Controls \u0026amp; Performance\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural Gas or Propane\/LP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMillivolt or Electronic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 30,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeating Efficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVented Application\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes, with required damper clamp sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"fa-spec-group-row\"\u003e\n\u003cth colspan=\"2\"\u003eMinimum Firebox Dimensions\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFront Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e26\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"fa-spec-group-row\"\u003e\n\u003cth colspan=\"2\"\u003eWarranty\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5-Year Limited Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-downloads\"\u003e\n\u003ch2\u003eManufacturer Manuals \u0026amp; Technical Resources\u003c\/h2\u003e\n\u003cp class=\"fa-section-intro\"\u003eReview the documentation that applies to the selected fuel and control configuration before installation, operation, service, or log placement.\u003c\/p\u003e\n\u003cdiv class=\"fa-downloads\"\u003e\n\u003ca class=\"fa-download-link\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/785692M_Superior-GasLogs-07.24.26-WEB.pdf?v=1790872178\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e Superior Gas Logs Brochure \u003cspan\u003eGeneral Superior gas-log product information\u003c\/span\u003e \u003c\/a\u003e \u003ca class=\"fa-download-link\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/785908M-Superior-Nature-FLAME-Smart-Sheet-0726-WEB.pdf?v=1790872180\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e Superior Nature-Flame Series Smart Sheet \u003cspan\u003eNature-Flame specifications and configuration reference\u003c\/span\u003e \u003c\/a\u003e \u003ca class=\"fa-download-link\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/Superior-VF-Logs-Complete-Line-Smart-Sheet-0726-WEB.pdf?v=1790872186\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e Superior Vent-Free Gas Logs Complete Line Smart Sheet \u003cspan\u003eComplete Superior vent-free gas log line reference\u003c\/span\u003e \u003c\/a\u003e \u003ca class=\"fa-download-link\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/901335-00_D_SUP_NF18-24_MN-MP_MV_VF_Burner_IICO.pdf?v=1790872232\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e Millivolt Vent-Free Burner Installation \u0026amp; Operation Manual \u003cspan\u003eMillivolt installation, operation, and safety requirements\u003c\/span\u003e \u003c\/a\u003e \u003ca class=\"fa-download-link\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/901336-00_D_SUP_NF18-24_EN-EP_VF_Burner_EL_IICO.pdf?v=1790872288\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e Electronic Vent-Free Burner Installation \u0026amp; Operation Manual \u003cspan\u003eElectronic installation, operation, and control requirements\u003c\/span\u003e \u003c\/a\u003e \u003ca class=\"fa-download-link\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/901556-00_A_IHP_Log_Placement_Guide_Highridge_Birch_Concrete_INSTR.pdf?v=1790875864\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e Highridge Birch Concrete Log Placement Guide \u003cspan\u003eRequired Highridge Birch log-placement reference\u003c\/span\u003e \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-expert\"\u003e\n\u003ch2\u003eFlame Authority Product Guidance\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSuperior Highridge Birch 18\" Nature-Flame Vent-Free Gas Log Set\u003c\/strong\u003e is suited to buyers who want a lighter birch-style fireplace presentation combined with Nature-Flame's natural-yellow flame appearance, flickering ember bed, and supplemental heating capability.\u003c\/p\u003e\n\u003cp\u003eThe primary purchase checks are the \u003cstrong\u003e26\" front width × 17\" rear width × 17\" height × 15\" depth minimum firebox dimensions\u003c\/strong\u003e, correct Natural Gas or Propane\/LP configuration, and the choice between a remote-ready millivolt system and an electronic configuration with the included EcoFlow touchscreen remote.\u003c\/p\u003e\n\u003cp\u003eIt is not suitable simply because a fireplace is wider than 18 inches. Fireplace construction, combustion and ventilation air, clearances, fuel supply, vent-free restrictions, log placement, and qualified installation requirements must also be verified.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\" id=\"fa-faq\"\u003e\n\u003ch2\u003eSuperior Highridge Birch 18\" FAQs\u003c\/h2\u003e\n\u003cdiv class=\"fa-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat size fireplace is required for the Superior Highridge Birch 18\"?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eThe usable firebox must be at least 26\" front width × 17\" rear width × 17\" height × 15\" depth. Do not install the system if any measurement is smaller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many BTUs does the Superior Highridge Birch 18\" produce?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eInput depends on fuel and controls: millivolt Natural Gas is 21,000–30,000 BTU\/hr, millivolt Propane\/LP is 21,000–29,000 BTU\/hr, and electronic configurations are 22,000–30,000 BTU\/hr.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I choose the millivolt or electronic Highridge Birch configuration?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eChoose millivolt for a remote-ready system using approved optional controls. Choose electronic when the included EcoFlow touchscreen remote, thermostat mode, and three flame-height settings are required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the Highridge Birch appliance be converted between Natural Gas and Propane\/LP?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eNo. Order the configuration designed for the installation's actual fuel supply; the supplied content states not to field-convert between Natural Gas and Propane\/LP.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the Highridge Birch 18\" be used in a vented fireplace?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eYes, in a qualifying vented fireplace application. A damper clamp is required for the applicable vented installation and is sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the Highridge Birch be installed in any wood-burning fireplace?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eNo. The fireplace must meet Superior's construction, size, clearance, combustion-air, and installation requirements, and some factory-built fireplaces prohibit unvented gas logs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I rearrange the Highridge Birch logs?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eNo. Install the logs only in the positions specified by Superior; incorrect positioning can interfere with flame and combustion performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre millivolt remote controls included?\u003c\/summary\u003e\n\u003cdiv class=\"fa-faq-answer\"\u003e\n\u003cp\u003eNo included millivolt remote is stated in the supplied content. Millivolt configurations are remote ready for compatible optional controls such as RCKIT4001, TRC, or GWMT1.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"fa-section\"\u003e\n\u003ch2\u003eFinal Before-Order Checklist\u003c\/h2\u003e\n\u003cdiv class=\"fa-decision-box\"\u003e\n\u003cdiv class=\"fa-decision-panel fa-best-for\"\u003e\n\u003ch3\u003eConfirm\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou want the Highridge Birch 18\" log style.\u003c\/li\u003e\n\u003cli\u003eThe usable firebox satisfies all four minimum dimensions.\u003c\/li\u003e\n\u003cli\u003eThe correct Natural Gas or Propane\/LP configuration is selected.\u003c\/li\u003e\n\u003cli\u003eThe preferred millivolt or electronic control system is selected.\u003c\/li\u003e\n\u003cli\u003eOptional versus included control equipment is understood.\u003c\/li\u003e\n\u003cli\u003eThe fireplace construction is compatible.\u003c\/li\u003e\n\u003cli\u003eRequired combustion and ventilation air can be provided.\u003c\/li\u003e\n\u003cli\u003eVent-free operation is permitted or applicable vented-use requirements can be met.\u003c\/li\u003e\n\u003cli\u003eRequired accessories such as a damper clamp are identified.\u003c\/li\u003e\n\u003cli\u003eQualified installation requirements can be met.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fa-decision-panel fa-not-for\"\u003e\n\u003ch3\u003eAvoid These Ordering Errors\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAssuming an 18\" fireplace opening is large enough.\u003c\/li\u003e\n\u003cli\u003eMeasuring the decorative opening instead of the usable firebox interior.\u003c\/li\u003e\n\u003cli\u003eOrdering the wrong fuel configuration.\u003c\/li\u003e\n\u003cli\u003ePlanning to field-convert the appliance fuel type.\u003c\/li\u003e\n\u003cli\u003eAssuming optional millivolt controls are included.\u003c\/li\u003e\n\u003cli\u003eAssuming every factory-built fireplace permits unvented gas logs.\u003c\/li\u003e\n\u003cli\u003eOperating without adequate combustion or ventilation air.\u003c\/li\u003e\n\u003cli\u003eChanging the approved log or ember placement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e","brand":"Superior Fireplaces","offers":[{"title":"Default Title","offer_id":46322936283180,"sku":"LNF18HB","price":369.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0354\/7607\/8636\/files\/superior-highridge-birch-18-nature-flame-vent-free-gas-log-set-fireplace-log-sets-lnf18hb-flame-authority-1260678248.webp?v=1790886036","url":"https:\/\/flameauthority.com\/products\/superior-highridge-birch-18-vent-free-gas-logs","provider":"Flame Authority","version":"1.0","type":"link"}