{"product_id":"hht-ak4-air-kit","title":"HHT Legacy Outside Combustion Air Kit for Majestic and Monessen Fireplaces | AK4","description":"\u003ch1\u003eHHT AK4 Outside Air Kit for Majestic \u0026amp; Monessen Fireplaces\u003c\/h1\u003e\n\u003ch2\u003eImprove Fireplace Efficiency with Dedicated Outside Combustion Air\u003c\/h2\u003e\n\u003cp\u003eBoost fireplace performance with the HHT AK4 Outside Air Kit, delivering outside combustion air for improved efficiency and cleaner operation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine HHT AK4 outside air kit for fireplaces\u003c\/li\u003e\n\u003cli\u003eDesigned for Majestic and Monessen vent-free fireboxes\u003c\/li\u003e\n\u003cli\u003eEnhances combustion efficiency and burn performance\u003c\/li\u003e\n\u003cli\u003eReduces negative pressure in airtight homes\u003c\/li\u003e\n\u003cli\u003eHelps improve indoor air quality and comfort\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of fireplace models\u003c\/li\u003e\n\u003cli\u003eDurable construction for long-term reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003ch4\u003eDirect Outside Combustion Air Supply\u003c\/h4\u003e\n\u003cp\u003eThe HHT AK4 outside air kit supplies fresh air directly from outdoors, reducing reliance on indoor air and improving fireplace efficiency—ideal for modern, energy-efficient homes.\u003c\/p\u003e\n\u003ch4\u003eImproves Fireplace Performance\u003c\/h4\u003e\n\u003cp\u003eBy providing consistent airflow, this outside combustion air kit helps maintain a steady flame, improves fuel efficiency, and supports optimal fireplace operation.\u003c\/p\u003e\n\u003ch4\u003eReduces Negative Air Pressure\u003c\/h4\u003e\n\u003cp\u003ePrevents drafts and pressure imbalances commonly found in tightly sealed homes, making it an essential fireplace air kit accessory.\u003c\/p\u003e\n\u003ch4\u003eWide Compatibility with Majestic \u0026amp; Monessen Fireplaces\u003c\/h4\u003e\n\u003cp\u003eEngineered for use with numerous vent-free fireboxes and fireplace systems, ensuring seamless installation and performance.\u003c\/p\u003e\n\u003ch4\u003eFlexible Installation Options\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCan be installed through exterior walls, crawl spaces, or basements\u003c\/li\u003e\n\u003cli\u003eSupports multiple installation configurations for different home layouts\u003c\/li\u003e\n\u003cli\u003eWorks with standard 4-inch ducting (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDurable OEM Construction\u003c\/h4\u003e\n\u003cp\u003eManufactured by Hearth \u0026amp; Home Technologies, ensuring high-quality materials and long-lasting performance in demanding heating environments.\u003c\/p\u003e\n\u003ch4\u003eSupports Cleaner Indoor Air\u003c\/h4\u003e\n\u003cp\u003eHelps reduce indoor air depletion and improves comfort by introducing fresh outside air for combustion.\u003c\/p\u003e\n\u003ch4\u003eCompatible Fireplace Models\u003c\/h4\u003e\n\u003cp\u003eCan be installed on:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBUF Series Fireboxes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBUF400 – 36\" Circulating Firebox with Radiant Cleanface\u003c\/li\u003e\n\u003cli\u003eBUF500 – 42\" Circulating Firebox with Radiant Cleanface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGCUF Series Fireboxes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGCUF32C-F, GCUF32C-R\u003c\/li\u003e\n\u003cli\u003eGCUF36C-F, GCUF36C-R\u003c\/li\u003e\n\u003cli\u003eGCUF42C-F, GCUF42C-R\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGRUF Series Fireboxes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGRUF32C-F, GRUF32C-R\u003c\/li\u003e\n\u003cli\u003eGRUF36C-F, GRUF36C-R\u003c\/li\u003e\n\u003cli\u003eGRUF42C-F, GRUF42C-R\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eLo-Rider Series Fireboxes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLCUF32-R, LCUF32CR-B\u003c\/li\u003e\n\u003cli\u003eLCUF36C-R, LCUF36CR-B\u003c\/li\u003e\n\u003cli\u003eLCUF42CR-B\u003c\/li\u003e\n\u003cli\u003eLPF36 (Peninsula)\u003c\/li\u003e\n\u003cli\u003eLSTF36, LSTF36-B (See-Thru)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMagnum Series Fireboxes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMCUF36D-R, MCUF36E-F\u003c\/li\u003e\n\u003cli\u003eMCUF42D-R, MCUF42E-F\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVent-Free Fireplace Systems (VFF Series)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVFF32CNI, VFF32CNV, VFF32CPI, VFF32CPV\u003c\/li\u003e\n\u003cli\u003eVFF32LNI, VFF32LNV, VFF32LPI, VFF32LPV\u003c\/li\u003e\n\u003cli\u003eVFF36CNI, VFF36CNV, VFF36CPI, VFF36CPV\u003c\/li\u003e\n\u003cli\u003eVFF36LNI, VFF36LNV, VFF36LPI, VFF36LPV\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOutside Combustion Air Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHearth \u0026amp; Home Technologies (HHT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAK4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAK4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMajestic \u0026amp; Monessen vent-free fireplaces and fireboxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOutside combustion air supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAir Intake Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4” flexible duct (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Locations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExterior wall, crawl space, basement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLeft or right side of firebox (model dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDurable metal construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUse Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFireplace outside air kit \/ combustion air kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Type Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGas vent-free fireplaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Benefit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eImproves combustion efficiency and airflow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Air Impact\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReduces indoor air usage and drafts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProfessional installation recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMajestic, Monessen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAir collar, hood, mounting components (varies by kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"HHT","offers":[{"title":"Default Title","offer_id":51898584695060,"sku":"AK4","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/9381\/2756\/files\/HHTAK4OutsideAirKit.webp?v=1773966738","url":"https:\/\/cozyglowstoves.com\/products\/hht-ak4-air-kit","provider":"Cozy Glow Stoves","version":"1.0","type":"link"}