{"title":"Combustion Air Dampers","description":"\u003cp\u003eCSA-certified motorized dampers for combustion air intake on natural gas, propane, and oil appliances — furnaces, boilers, fireplaces, and water heaters. The appliance cannot fire until the damper proves open. 24 Vac spring return. Includes the HOM inline series and MOH motorized wall hood. End switch required for ADP relay adaptor interlock.\u003c\/p\u003e","products":[{"product_id":"hom-combustion-air-damper-24vac","title":"HOM Motorized Combustion Air Damper — CSA Certified, 24 Vac, 4\"–9\", Spring Return","description":"\u003cp\u003e\u003cem\u003eProduct image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.\u003c\/em\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .hom-desc * { box-sizing: border-box; margin: 0; padding: 0; }\n  .hom-desc { font-family: 'Open Sans', sans-serif; color: #001F3F; line-height: 1.6; font-size: 15px; }\n\n  .hom-desc__intro { font-size: 15px; line-height: 1.75; color: #374151; margin-bottom: 20px; }\n\n  .hom-desc__bullets { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }\n  .hom-desc__bullet { display: flex; align-items: flex-start; gap: 10px; }\n  .hom-desc__bullet-check { color: #C8102E; font-weight: 700; font-size: 14px; flex-shrink: 0; line-height: 1.6; }\n  .hom-desc__bullet-text { font-size: 14px; color: #374151; font-family: 'Open Sans', sans-serif; line-height: 1.6; }\n  .hom-desc__bullet-text strong { font-family: 'Montserrat', sans-serif; font-weight: 700; color: #001F3F; }\n\n  .hom-desc__warning { background: #fff3f4; border-left: 4px solid #C8102E; border-radius: 0 4px 4px 0; padding: 12px 16px; margin-bottom: 20px; font-size: 13.5px; color: #001F3F; font-family: 'Open Sans', sans-serif; line-height: 1.6; }\n  .hom-desc__warning strong { font-family: 'Montserrat', sans-serif; font-weight: 700; color: #C8102E; }\n\n  .hom-desc__note { background: #F3F6F8; border-left: 4px solid #001F3F; border-radius: 0 4px 4px 0; padding: 12px 16px; margin-bottom: 20px; font-size: 13.5px; color: #001F3F; font-family: 'Open Sans', sans-serif; line-height: 1.6; }\n  .hom-desc__note strong { font-family: 'Montserrat', sans-serif; font-weight: 700; }\n\n  .hom-desc__specs { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; margin-bottom: 20px; }\n  .hom-desc__spec { background: #F3F6F8; border: 1px solid #e2e8f0; border-radius: 5px; padding: 10px 12px; }\n  .hom-desc__spec-label { font-family: 'Montserrat', sans-serif; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: #718096; margin-bottom: 3px; }\n  .hom-desc__spec-value { font-family: 'Montserrat', sans-serif; font-size: 12.5px; font-weight: 700; color: #001F3F; line-height: 1.35; }\n  .hom-desc__spec--highlight { background: #001F3F; border-color: #001F3F; }\n  .hom-desc__spec--highlight .hom-desc__spec-label { color: rgba(255,255,255,0.5); }\n  .hom-desc__spec--highlight .hom-desc__spec-value { color: #FFFFFF; }\n\n  .hom-desc__variants { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 20px; }\n  .hom-desc__variant { background: #F3F6F8; border: 1px solid #e2e8f0; border-radius: 5px; padding: 12px 14px; }\n  .hom-desc__variant-code { font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 800; color: #C8102E; margin-bottom: 3px; }\n  .hom-desc__variant-name { font-family: 'Montserrat', sans-serif; font-size: 11.5px; font-weight: 700; color: #001F3F; margin-bottom: 4px; }\n  .hom-desc__variant-desc { font-size: 12px; color: #374151; font-family: 'Open Sans', sans-serif; line-height: 1.45; }\n\n  .hom-desc__warranty { display: flex; align-items: center; gap: 10px; background: #001F3F; border-radius: 5px; padding: 12px 16px; }\n  .hom-desc__warranty-text { font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; color: #FFFFFF; }\n  .hom-desc__warranty-sub { font-size: 12px; color: rgba(255,255,255,0.6); font-family: 'Open Sans', sans-serif; margin-top: 2px; }\n\n  @media (max-width: 480px) {\n    .hom-desc__variants { grid-template-columns: 1fr; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hom-desc\"\u003e\n\u003cp class=\"hom-desc__intro\"\u003eCSA-certified motorized combustion air damper for furnaces, boilers, fireplaces, and water heaters. The appliance cannot fire until the damper proves open — closing the combustion air intake when the appliance is off and interlocking it with the appliance safety circuit on demand. 24 Vac, 4\"–9\", Power Close \/ Spring Open.\u003c\/p\u003e\n\u003cdiv class=\"hom-desc__bullets\"\u003e\n\u003cdiv class=\"hom-desc__bullet\"\u003e\n\u003cspan class=\"hom-desc__bullet-check\"\u003e✓\u003c\/span\u003e \u003cspan class=\"hom-desc__bullet-text\"\u003e\u003cstrong\u003ePower Close \/ Spring Open\u003c\/strong\u003e — motor holds the damper closed when the appliance is off; spring opens it the moment power is removed when the appliance fires, keeping the combustion air path clear\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__bullet\"\u003e\n\u003cspan class=\"hom-desc__bullet-check\"\u003e✓\u003c\/span\u003e \u003cspan class=\"hom-desc__bullet-text\"\u003e\u003cstrong\u003eCSA certified — complete assembly\u003c\/strong\u003e — damper body, drive, and control hardware together; covers Canadian and US installations\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__bullet\"\u003e\n\u003cspan class=\"hom-desc__bullet-check\"\u003e✓\u003c\/span\u003e \u003cspan class=\"hom-desc__bullet-text\"\u003e\u003cstrong\u003eBuilt-in end switch\u003c\/strong\u003e — confirms blade has physically reached open position; required for ADP relay adaptor combustion air interlock so the appliance cannot fire until the damper proves open\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__bullet\"\u003e\n\u003cspan class=\"hom-desc__bullet-check\"\u003e✓\u003c\/span\u003e \u003cspan class=\"hom-desc__bullet-text\"\u003e\u003cstrong\u003eTest\/Run switch\u003c\/strong\u003e — allows manual override to hold the damper open for summer months or appliance troubleshooting without powering the motor continuously\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__bullet\"\u003e\n\u003cspan class=\"hom-desc__bullet-check\"\u003e✓\u003c\/span\u003e \u003cspan class=\"hom-desc__bullet-text\"\u003e\u003cstrong\u003eAdjustable extension sleeve\u003c\/strong\u003e — covers wall thicknesses 7½\"–14\" without custom fabrication; flashing included\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__bullet\"\u003e\n\u003cspan class=\"hom-desc__bullet-check\"\u003e✓\u003c\/span\u003e \u003cspan class=\"hom-desc__bullet-text\"\u003e\u003cstrong\u003eNot suitable for dryer ventilation\u003c\/strong\u003e — lint accumulation in the motor assembly causes premature failure; use the BDH Back Draft Hood for dryer exhaust\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__variants\"\u003e\n\u003cdiv class=\"hom-desc__variant\"\u003e\n\u003cdiv class=\"hom-desc__variant-code\"\u003eSF1\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__variant-name\"\u003eSingle-furnace — one appliance\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__variant-desc\"\u003eControls and interlocks one furnace, boiler, or appliance. Standard configuration for most residential installations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__variant\"\u003e\n\u003cdiv class=\"hom-desc__variant-code\"\u003eSF2\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__variant-name\"\u003eDual-furnace — two appliances\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__variant-desc\"\u003eOne damper interlocks with two appliances. Either appliance calling for heat opens the damper; neither can fire until it proves open.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__warning\"\u003e\n\u003cstrong\u003eSF1 vs. SF2 — confirm before ordering.\u003c\/strong\u003e SF1 is for installations with one appliance sharing the combustion air duct. SF2 is for installations where two appliances share the same combustion air duct and either may call for heat independently. For commercial applications with appliances rated over 400,000 BTU, slave dampers can be added to the SF1 or SF2 — contact the factory.\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__specs\"\u003e\n\u003cdiv class=\"hom-desc__spec hom-desc__spec--highlight\"\u003e\n\u003cdiv class=\"hom-desc__spec-label\"\u003eInterlock\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec-value\"\u003eAppliance cannot fire until damper proves open\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec\"\u003e\n\u003cdiv class=\"hom-desc__spec-label\"\u003eSizes\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec-value\"\u003e4\"–9\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec\"\u003e\n\u003cdiv class=\"hom-desc__spec-label\"\u003eVoltage\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec-value\"\u003e24 Vac\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec\"\u003e\n\u003cdiv class=\"hom-desc__spec-label\"\u003eAction\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec-value\"\u003ePower Close \/ Spring Open\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec\"\u003e\n\u003cdiv class=\"hom-desc__spec-label\"\u003eWall Thickness\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec-value\"\u003e7½\"–14\" adjustable\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec\"\u003e\n\u003cdiv class=\"hom-desc__spec-label\"\u003eCertification\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__spec-value\"\u003eCSA — complete assembly\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__note\"\u003e\n\u003cstrong\u003eNeed an ADP relay adaptor?\u003c\/strong\u003e For combustion air interlock — appliance cannot fire until the HOM end switch confirms the damper is open — pair the HOM with the correct ADP: ADP-0MV2-S5A (millivolt appliances), ADP-0240-05A (24 Vac furnace), or ADP-1102-S5A (120 Vac boiler\/tankless).\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__warranty\"\u003e\n\u003csvg style=\"flex-shrink: 0;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"20\" width=\"20\"\u003e\n      \u003cpath stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.8\" stroke=\"#C8102E\" d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\n      \u003cpath stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.8\" stroke=\"#C8102E\" d=\"M9 12l2 2 4-4\"\u003e\u003c\/path\u003e\n    \u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hom-desc__warranty-text\"\u003e2-year electrical · 10-year mechanical warranty\u003c\/div\u003e\n\u003cdiv class=\"hom-desc__warranty-sub\"\u003eMade in Canada · 40+ years field-proven in Canadian climates\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Hoyme Manufacturing","offers":[{"title":"4\" \/ SF1","offer_id":43079070384171,"sku":"HOM-0411-SF1","price":354.0,"currency_code":"CAD","in_stock":true},{"title":"4\" \/ SF2","offer_id":43079070416939,"sku":"HOM-0412-SF2","price":439.0,"currency_code":"CAD","in_stock":true},{"title":"4\" \/ S01","offer_id":43079070449707,"sku":"HOM-0410-SO1","price":289.0,"currency_code":"CAD","in_stock":true},{"title":"4\" \/ S02","offer_id":43079070482475,"sku":"HOM-0411-SO2","price":345.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ SF1","offer_id":43079070515243,"sku":"HOM-0511-SF1","price":359.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ SF2","offer_id":43079070548011,"sku":"HOM-0512-SF2","price":441.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ S01","offer_id":43079070580779,"sku":"HOM-0510-SO1","price":295.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ S02","offer_id":43079070613547,"sku":"HOM-0511-SO2","price":348.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ SF1","offer_id":43079070646315,"sku":"HOM-0611-SF1","price":363.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ SF2","offer_id":43079070679083,"sku":"HOM-0612-SF2","price":448.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ S01","offer_id":43079070711851,"sku":"HOM-0610-SO1","price":296.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ S02","offer_id":43079070744619,"sku":"HOM-0611-SO2","price":355.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ SF1","offer_id":43079070777387,"sku":"HOM-0711-SF1","price":369.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ SF2","offer_id":43079070810155,"sku":"HOM-0712-SF2","price":452.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ S01","offer_id":43079070842923,"sku":"HOM-0710-SO1","price":305.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ S02","offer_id":43079070875691,"sku":"HOM-0711-SO2","price":361.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ SF1","offer_id":43079070908459,"sku":"HOM-0811-SF1","price":372.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ SF2","offer_id":43079070941227,"sku":"HOM-0812-SF2","price":460.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ S01","offer_id":43079070973995,"sku":"HOM-0810-SO1","price":310.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ S02","offer_id":43079071006763,"sku":"HOM-0811-SO2","price":367.0,"currency_code":"CAD","in_stock":true},{"title":"9\" \/ SF1","offer_id":43079071039531,"sku":"HOM-0911-SF1","price":383.0,"currency_code":"CAD","in_stock":true},{"title":"9\" \/ SF2","offer_id":43079071072299,"sku":"HOM-0912-SF2","price":465.0,"currency_code":"CAD","in_stock":true},{"title":"9\" \/ S01","offer_id":43079071105067,"sku":"HOM-0910-SO1","price":317.0,"currency_code":"CAD","in_stock":true},{"title":"9\" \/ S02","offer_id":43079071137835,"sku":"HOM-0911-SO2","price":372.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/3459\/3067\/files\/image_92_7e73faad-192c-40b7-bd14-e45db1c8d48b.png?v=1775771670"},{"product_id":"moh-motorized-all-weather-hood-24vac","title":"MOH Motorized All-Weather Hood Damper — CSA Certified, 24 Vac, 4\"–9\", Spring Return","description":"\u003cp\u003e\u003cem\u003eProduct image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.\u003c\/em\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .moh-desc * { box-sizing: border-box; margin: 0; padding: 0; }\n  .moh-desc { font-family: 'Open Sans', sans-serif; color: #001F3F; line-height: 1.6; font-size: 15px; }\n\n  .moh-desc__intro { font-size: 15px; line-height: 1.75; color: #374151; margin-bottom: 20px; }\n\n  .moh-desc__bullets { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }\n  .moh-desc__bullet { display: flex; align-items: flex-start; gap: 10px; }\n  .moh-desc__bullet-check { color: #C8102E; font-weight: 700; font-size: 14px; flex-shrink: 0; line-height: 1.6; }\n  .moh-desc__bullet-text { font-size: 14px; color: #374151; font-family: 'Open Sans', sans-serif; line-height: 1.6; }\n  .moh-desc__bullet-text strong { font-family: 'Montserrat', sans-serif; font-weight: 700; color: #001F3F; }\n\n  .moh-desc__warning { background: #fff3f4; border-left: 4px solid #C8102E; border-radius: 0 4px 4px 0; padding: 12px 16px; margin-bottom: 20px; font-size: 13.5px; color: #001F3F; font-family: 'Open Sans', sans-serif; line-height: 1.6; }\n  .moh-desc__warning strong { font-family: 'Montserrat', sans-serif; font-weight: 700; color: #C8102E; }\n\n  .moh-desc__note { background: #F3F6F8; border-left: 4px solid #001F3F; border-radius: 0 4px 4px 0; padding: 12px 16px; margin-bottom: 20px; font-size: 13.5px; color: #001F3F; font-family: 'Open Sans', sans-serif; line-height: 1.6; }\n  .moh-desc__note strong { font-family: 'Montserrat', sans-serif; font-weight: 700; }\n  .moh-desc__note a { color: #C8102E; text-decoration: none; font-weight: 600; }\n\n  .moh-desc__compare { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 20px; }\n  .moh-desc__compare-card { background: #F3F6F8; border: 1px solid #e2e8f0; border-radius: 5px; padding: 12px 14px; }\n  .moh-desc__compare-card--red { border-top: 3px solid #C8102E; }\n  .moh-desc__compare-card--navy { border-top: 3px solid #001F3F; }\n  .moh-desc__compare-title { font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 800; color: #001F3F; margin-bottom: 8px; }\n  .moh-desc__compare-item { display: flex; align-items: flex-start; gap: 7px; margin-bottom: 5px; }\n  .moh-desc__compare-item:last-child { margin-bottom: 0; }\n  .moh-desc__compare-dot--red { color: #C8102E; font-weight: 700; font-size: 13px; flex-shrink: 0; line-height: 1.5; }\n  .moh-desc__compare-dot--navy { color: #001F3F; font-weight: 700; font-size: 13px; flex-shrink: 0; line-height: 1.5; }\n  .moh-desc__compare-text { font-size: 12.5px; color: #374151; font-family: 'Open Sans', sans-serif; line-height: 1.45; }\n\n  .moh-desc__specs { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; margin-bottom: 20px; }\n  .moh-desc__spec { background: #F3F6F8; border: 1px solid #e2e8f0; border-radius: 5px; padding: 10px 12px; }\n  .moh-desc__spec-label { font-family: 'Montserrat', sans-serif; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: #718096; margin-bottom: 3px; }\n  .moh-desc__spec-value { font-family: 'Montserrat', sans-serif; font-size: 12.5px; font-weight: 700; color: #001F3F; line-height: 1.35; }\n  .moh-desc__spec--highlight { background: #001F3F; border-color: #001F3F; }\n  .moh-desc__spec--highlight .moh-desc__spec-label { color: rgba(255,255,255,0.5); }\n  .moh-desc__spec--highlight .moh-desc__spec-value { color: #FFFFFF; }\n  .moh-desc__spec--red { background: #fff3f4; border-color: #C8102E; }\n  .moh-desc__spec--red .moh-desc__spec-label { color: #C8102E; }\n  .moh-desc__spec--red .moh-desc__spec-value { color: #C8102E; }\n  .moh-desc__spec--amber { background: #fffbeb; border-color: #d97706; }\n  .moh-desc__spec--amber .moh-desc__spec-label { color: #92400e; }\n  .moh-desc__spec--amber .moh-desc__spec-value { color: #92400e; }\n\n  .moh-desc__warranty { display: flex; align-items: center; gap: 10px; background: #001F3F; border-radius: 5px; padding: 12px 16px; }\n  .moh-desc__warranty-text { font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; color: #FFFFFF; }\n  .moh-desc__warranty-sub { font-size: 12px; color: rgba(255,255,255,0.6); font-family: 'Open Sans', sans-serif; margin-top: 2px; }\n\n  @media (max-width: 480px) {\n    .moh-desc__compare { grid-template-columns: 1fr; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"moh-desc\"\u003e\n\n  \u003cp class=\"moh-desc__intro\"\u003eMotorized all-weather hood damper that mounts at the wall penetration — hood, damper, and flashing in one unit. Seals at the building exterior when the system is off. Same patented Hoyme 24 Vac spring return drive as the HAC and HOM lineup. CSA certified. Sizes 4\"–8\".\u003c\/p\u003e\n\n  \u003cdiv class=\"moh-desc__bullets\"\u003e\n\n    \u003cdiv class=\"moh-desc__bullet\"\u003e\n      \u003cspan class=\"moh-desc__bullet-check\"\u003e✓\u003c\/span\u003e\n      \u003cspan class=\"moh-desc__bullet-text\"\u003e\u003cstrong\u003eSeals at the wall — not in the duct\u003c\/strong\u003e — when the MOH closes, the air path is sealed at the building exterior; no cold air column sitting in the duct between the damper and outside between ventilation cycles\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"moh-desc__bullet\"\u003e\n      \u003cspan class=\"moh-desc__bullet-check\"\u003e✓\u003c\/span\u003e\n      \u003cspan class=\"moh-desc__bullet-text\"\u003e\u003cstrong\u003eOne unit replaces two\u003c\/strong\u003e — eliminates the separate all-weather hood and inline damper that a standard HAC + OOH installation requires at two different points in the system\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"moh-desc__bullet\"\u003e\n      \u003cspan class=\"moh-desc__bullet-check\"\u003e✓\u003c\/span\u003e\n      \u003cspan class=\"moh-desc__bullet-text\"\u003e\u003cstrong\u003eSame patented Hoyme spring motor drive\u003c\/strong\u003e — stall-protected Synchron motor, nylon bearings; holds against ice load without tripping, clears the obstruction when conditions change\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- CORRECTION (final pass): Original bullet said \"Adjustable extension sleeve 7½\"–14\" —\n         accommodates standard 2×4 and 2×6 wall assemblies.\" The MOH product bulletin\n         in the technical library states the extension sleeve is OPTIONAL:\n         \"Optional extension sleeve increases 'L' from 7½\" to 14'\"\n         \"Options: screen yes\/no, extension sleeve yes\/no\"\n         Base \"L\" dimension is 7½\" (standard, no sleeve). The extension sleeve must be\n         specified at order if the wall depth exceeds 7½\". Corrected accordingly.\n         Same correction applied to the specs card and warning below. --\u003e\n    \u003cdiv class=\"moh-desc__bullet\"\u003e\n      \u003cspan class=\"moh-desc__bullet-check\"\u003e✓\u003c\/span\u003e\n      \u003cspan class=\"moh-desc__bullet-text\"\u003e\u003cstrong\u003eBase \"L\" dimension 7½\" — extension sleeve available for deeper walls\u003c\/strong\u003e — standard unit fits typical 2×4 wall assemblies (7½\"); optional extension sleeve extends reach up to 14\" for 2×6, stucco, and thicker wall assemblies; specify at order; flashing included\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"moh-desc__bullet\"\u003e\n      \u003cspan class=\"moh-desc__bullet-check\"\u003e✓\u003c\/span\u003e\n      \u003cspan class=\"moh-desc__bullet-text\"\u003e\u003cstrong\u003eCSA certified — complete assembly\u003c\/strong\u003e — motor, blade, and housing; covers fresh air intake and combustion air applications for Canadian and US installations\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"moh-desc__bullet\"\u003e\n      \u003cspan class=\"moh-desc__bullet-check\"\u003e✓\u003c\/span\u003e\n      \u003cspan class=\"moh-desc__bullet-text\"\u003e\u003cstrong\u003ePO or PC action, end switch available\u003c\/strong\u003e — all factory-set; confirm PO vs. PC before ordering — cannot be changed after installation; end switch required for combustion air appliance interlock\u003c\/span\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- CORRECTION: Warning previously said \"confirm wall thickness is within the 7½\"–14\"\n       extension sleeve range before ordering.\" This was inaccurate — the 7½\"–14\" range\n       is only achievable with the optional extension sleeve ordered. The base unit fits\n       7½\" wall depth. Corrected to reflect the optional nature of the extension sleeve. --\u003e\n  \u003cdiv class=\"moh-desc__warning\"\u003e\n    \u003cstrong\u003eNot for dryer ventilation.\u003c\/strong\u003e The dryer exhaust environment — high humidity, lint, elevated temperature — is outside the MOH's listed application. Use the \u003ca style=\"color: #c8102e; text-decoration: none; font-weight: 600;\" href=\"\/products\/bdh-back-draft-hood\"\u003eBDH Back Draft Hood\u003c\/a\u003e for dryer exhaust termination. Also confirm wall depth at the installation point: the standard \"L\" dimension is 7½\". If wall depth exceeds 7½\", specify the extension sleeve at order — it extends reach to 14\". Walls exceeding 14\" require factory confirmation.\u003c\/div\u003e\n\n  \u003cdiv class=\"moh-desc__compare\"\u003e\n    \u003cdiv class=\"moh-desc__compare-card moh-desc__compare-card--red\"\u003e\n      \u003cdiv class=\"moh-desc__compare-title\"\u003eUse MOH when…\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--red\"\u003e✓\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eWall penetration is the natural control point\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--red\"\u003e✓\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eSealing at the building exterior is the priority\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--red\"\u003e✓\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eOne unit instead of separate hood + inline damper\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--red\"\u003e✓\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eRetrofit where replacing the existing hood is the cleaner solution\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__compare-card moh-desc__compare-card--navy\"\u003e\n      \u003cdiv class=\"moh-desc__compare-title\"\u003eUse HAC + OOH when…\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--navy\"\u003e→\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eDamper needs to be in the duct run — not at the wall\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--navy\"\u003e→\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eExisting all-weather hood already in place\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--navy\"\u003e→\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eInsulated damper body needed — see HAC-L\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__compare-item\"\u003e\n        \u003cspan class=\"moh-desc__compare-dot--navy\"\u003e→\u003c\/span\u003e\u003cspan class=\"moh-desc__compare-text\"\u003eHeat bypass needed for zone control — see HAC-H\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- Specs card: \"Wall Thickness\" corrected from \"7½\"–14\" adjustable\" to reflect\n       that 7½\" is the standard L dimension and 14\" requires the optional extension sleeve. --\u003e\n  \u003cdiv class=\"moh-desc__specs\"\u003e\n    \u003cdiv class=\"moh-desc__spec moh-desc__spec--highlight\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eSeals at\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003eBuilding exterior — not in duct\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eSizes\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003e4\"–8\"\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eVoltage\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003e24 Vac, 5W\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eAction\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003ePO or PC\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eWall Depth (\"L\")\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003e7½\" standard; 14\" with optional extension sleeve\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eCertification\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003eCSA — complete assembly\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec moh-desc__spec--red\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eNot Suitable For\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003eDryer ventilation — use BDH\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"moh-desc__spec moh-desc__spec--amber\"\u003e\n      \u003cdiv class=\"moh-desc__spec-label\"\u003eConfirm Before Ordering\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__spec-value\"\u003eWall depth; extension sleeve if wall \u0026gt; 7½\"\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"moh-desc__note\"\u003e\n    \u003cstrong\u003eCombustion air interlock?\u003c\/strong\u003e Order the MOH with end switch (SPO or SPC variant). The end switch proves the blade has physically reached the open position before the appliance fires. Select the correct ADP adaptor by appliance type: \u003ca href=\"\/products\/adp-damper-interlock-relay-adaptor\"\u003eADP-0MV2-S5A\u003c\/a\u003e (millivolt), \u003ca href=\"\/products\/adp-damper-interlock-relay-adaptor\"\u003eADP-1102-S5A\u003c\/a\u003e (110 Vac boiler\/tankless), or see the \u003ca href=\"\/products\/adp-damper-interlock-relay-adaptor\"\u003eADP series\u003c\/a\u003e for 24 Vac furnace applications.\u003c\/div\u003e\n\n  \u003cdiv class=\"moh-desc__warranty\"\u003e\n    \u003csvg style=\"flex-shrink: 0;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"20\" width=\"20\"\u003e\n      \u003cpath stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.8\" stroke=\"#C8102E\" d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\n      \u003cpath stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.8\" stroke=\"#C8102E\" d=\"M9 12l2 2 4-4\"\u003e\u003c\/path\u003e\n    \u003c\/svg\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"moh-desc__warranty-text\"\u003e2-year electrical  ·  10-year mechanical warranty\u003c\/div\u003e\n      \u003cdiv class=\"moh-desc__warranty-sub\"\u003eMade in Canada  ·  Same Hoyme spring motor drive as HAC and HOM lineup\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Hoyme Manufacturing","offers":[{"title":"4\" \/ Power Open (PO) \/ Standard","offer_id":43336326021163,"sku":"MOH-0410-OPO","price":251.0,"currency_code":"CAD","in_stock":true},{"title":"4\" \/ Power Open (PO) \/ End Switch","offer_id":43336326053931,"sku":"MOH-0410-SPO","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"4\" \/ Power Close (PC) \/ Standard","offer_id":43336326086699,"sku":"MOH-0410-OPC","price":251.0,"currency_code":"CAD","in_stock":true},{"title":"4\" \/ Power Close (PC) \/ End Switch","offer_id":43336326119467,"sku":"MOH-0410-SPC","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ Power Open (PO) \/ Standard","offer_id":43336326152235,"sku":"MOH-0510-OPO","price":253.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ Power Open (PO) \/ End Switch","offer_id":43336326185003,"sku":"MOH-0510-SPO","price":282.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ Power Close (PC) \/ Standard","offer_id":43336326217771,"sku":"MOH-0510-OPC","price":253.0,"currency_code":"CAD","in_stock":true},{"title":"5\" \/ Power Close (PC) \/ End Switch","offer_id":43336326250539,"sku":"MOH-0510-SPC","price":282.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ Power Open (PO) \/ Standard","offer_id":43336326283307,"sku":"MOH-0610-OPO","price":260.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ Power Open (PO) \/ End Switch","offer_id":43336326316075,"sku":"MOH-0610-SPO","price":286.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ Power Close (PC) \/ Standard","offer_id":43336326348843,"sku":"MOH-0610-OPC","price":260.0,"currency_code":"CAD","in_stock":true},{"title":"6\" \/ Power Close (PC) \/ End Switch","offer_id":43336326381611,"sku":"MOH-0610-SPC","price":286.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ Power Open (PO) \/ Standard","offer_id":43336326414379,"sku":"MOH-0710-OPO","price":264.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ Power Open (PO) \/ End Switch","offer_id":43336326447147,"sku":"MOH-0710-SPO","price":290.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ Power Close (PC) \/ Standard","offer_id":43336326479915,"sku":"MOH-0710-OPC","price":264.0,"currency_code":"CAD","in_stock":true},{"title":"7\" \/ Power Close (PC) \/ End Switch","offer_id":43336326512683,"sku":"MOH-0710-SPC","price":290.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ Power Open (PO) \/ Standard","offer_id":43336326545451,"sku":"MOH-0810-OPO","price":268.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ Power Open (PO) \/ End Switch","offer_id":43336326578219,"sku":"MOH-0810-SPO","price":296.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ Power Close (PC) \/ Standard","offer_id":43336326610987,"sku":"MOH-0810-OPC","price":268.0,"currency_code":"CAD","in_stock":true},{"title":"8\" \/ Power Close (PC) \/ End Switch","offer_id":43336326643755,"sku":"MOH-0810-SPC","price":296.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/3459\/3067\/files\/moh.png?v=1775765988"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/3459\/3067\/collections\/hom.png?v=1775506419","url":"https:\/\/www.hoyme.com\/collections\/combustion-air-dampers.oembed","provider":"Hoyme Manufacturing","version":"1.0","type":"link"}