{"product_id":"armstrong-furnace-r42537-001-fan-blade","title":"Armstrong Furnace R42537-001 Fan Blade","description":"\u003cp\u003eThe \u003cstrong\u003eArmstrong Furnace R42537-001 Fan Blade\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003e18-inch 2-blade condenser fan\u003c\/strong\u003e designed for high-efficiency heat dissipation in residential and light commercial HVAC units. Engineered with a \u003cstrong\u003e1\/2-inch bore\u003c\/strong\u003e and fixed by a set screw, this aluminum replacement blade ensures optimal airflow across the condenser coils, maintaining critical head pressure during peak cooling cycles. As a genuine \u003cstrong\u003eAllied Air Enterprises replacement part\u003c\/strong\u003e, it meets exact factory specifications for pitch, balance, and rotation, reducing mechanical stress on the condenser motor bearings and extending the service life of the outdoor unit. This \u003cstrong\u003eHVAC blower component\u003c\/strong\u003e is essential for technicians performing seasonal maintenance or emergency repairs where vibration or blade deformation has compromised system performance. Integrating this OEM-spec \u003cstrong\u003epropeller fan blade\u003c\/strong\u003e restores original airflow CFM ratings, ensuring the system operates within its designed subcooling and superheat parameters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Technical Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized 18\" Diameter:\u003c\/strong\u003e Ensures full coverage across the coil surface area for maximum heat transfer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Balanced 2-Blade Design:\u003c\/strong\u003e Minimizes axial vibration and reduces acoustic output during motor operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Aluminum Construction:\u003c\/strong\u003e Provides superior corrosion resistance in harsh outdoor environments compared to galvanized steel alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1\/2\" Bore:\u003c\/strong\u003e Facilitates direct compatibility with standard NEMA frame condenser motors used in Armstrong and Allied units.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fan blade include the mounting set screw?\u003c\/strong\u003e\u003cbr\u003eYes, this 18-inch fan blade typically ships with the integrated hub and set screw required for securing it to the motor shaft.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this blade replace a 3-blade or 4-blade model?\u003c\/strong\u003e\u003cbr\u003eNo. For proper motor loading and static pressure, you must match the original blade count and pitch specified by the equipment manufacturer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I determine the correct rotation for this Armstrong replacement?\u003c\/strong\u003e\u003cbr\u003eRotation is determined by looking down at the discharge side of the blade; verify your specific unit's wiring and motor rotation before installation to ensure correct airflow direction.\u003c\/p\u003e\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cspan style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/span\u003e\u003cspan style=\"font-size: 10.0pt; font-family: 'Arial',sans-serif; color: red; background: white;\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e","brand":"Armstrong Furnace","offers":[{"title":"Default Title","offer_id":35647259148,"sku":"R42537-001","price":117.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_49b030f0-880b-43cb-ad22-663699e62baf.png?v=1785435807","url":"https:\/\/www.gsistore.com\/products\/armstrong-furnace-r42537-001-fan-blade","provider":"GSIstore","version":"1.0","type":"link"}