{"product_id":"ewc-controls-nd-18x8-motorized-damper-18x8-in-rectangular-24v","title":"Ewc Controls Nd 18X8 Motorized Damper 18x8 in Rectangular 24V","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe EWC CONTROLS ND 18X8 is a rectangular motorized zone damper designed for 24-volt HVAC zoning systems. Measuring 18 inches by 8 inches, it fits standard rectangular ductwork and controls airflow in multi-zone forced-air systems. The damper uses a side-mounted motor with a 3-wire connection and features an LED indicator that allows the installer to visually confirm damper operation without removing the unit from the duct. Nylon bushings reduce operational noise, and the reinforced frame speeds up duct installation. The motor is rated for long service life, reducing callback risk after commissioning.\u003c\/p\u003e\u003cp\u003eThe ND 18X8 is suited for residential and light-commercial HVAC zoning applications where airflow to individual zones must be controlled independently. It is intended for installation in rectangular supply or return duct runs as part of a multi-zone system. The LED status light is particularly useful during system checkout, letting the technician confirm blade position from a visible distance. HVAC zoning contractors and mechanical installers are the primary trade installing this damper in new construction and retrofit zoning projects.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLED indicator light confirms damper blade position during installation and checkout\u003c\/li\u003e\n\u003cli\u003eSide-mounted motor with 3-wire connection for standard 24-volt zone control wiring\u003c\/li\u003e\n\u003cli\u003eNylon bushings provide quieter operation compared to standard metal-bushing dampers\u003c\/li\u003e\n\u003cli\u003eReinforced frame design speeds duct insertion and reduces installation time\u003c\/li\u003e\n\u003cli\u003eRectangular 18-inch by 8-inch profile fits common duct sizing\u003c\/li\u003e\n\u003cli\u003eLong-life motor design reduces service callbacks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation motorized damper for rectangular 24-volt HVAC zoning systems requiring a side-mount motor configuration.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician following applicable mechanical codes. Power the zone control board down before wiring the damper motor to avoid control board damage. Confirm duct dimensions match the 18-inch by 8-inch damper frame before insertion. Use the LED indicator during system startup to verify blade travel and confirm proper zone controller communication.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Motorized Damper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 18 inches x 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape\u003c\/strong\u003e: Rectangle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 24 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWires to Motor\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Mount\u003c\/strong\u003e: Side\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures\u003c\/strong\u003e: LED Light\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Air Quality \/ HVAC Zoning\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: EWC CONTROLS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ND 18X8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EWC CONTROLS","offers":[{"title":"Default Title","offer_id":51524627464498,"sku":"ND 18X8","price":253.28,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1d14577f30d93c382e4a421859e6a9ea.jpg?v=1785453432","url":"https:\/\/voomisupply.com\/products\/ewc-controls-nd-18x8-motorized-damper-18x8-in-rectangular-24v","provider":"Voomi Supply","version":"1.0","type":"link"}