{"product_id":"oem-lennox-blower-wheel-21709","title":"OEM Lennox Blower Wheel — 21709","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e21709\u003c\/strong\u003e blower wheel — also called a squirrel cage — is the forward-curved fan that moves conditioned air through your ductwork. Mounted to the blower motor shaft, its precisely angled blades draw air across the heat exchanger or coil and push it into your home. Factory-balanced construction lets the \u003cstrong\u003e21709\u003c\/strong\u003e deliver the rated CFM your Lennox system was designed to produce, quietly and efficiently.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003e21709\u003c\/strong\u003e blower wheel typically causes weak or reduced airflow from the vents, loud vibration or a wobbling, rattling noise from the blower compartment, and uneven heating or cooling. Cracked blades, an out-of-balance wheel, or heavy dirt buildup throw the wheel off-center, straining the motor bearings and driving up energy use. A loose hub that slips on the shaft is another frequent culprit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Airflow performance depends on the exact blade geometry, diameter, and balance of the blower wheel. The factory Lennox \u003cstrong\u003e21709\u003c\/strong\u003e is engineered to your unit's specifications for a true fit, correct rotation, and rated air delivery — critical for proper heat exchange and system efficiency. Generic wheels with slightly different dimensions cause vibration, noise, and reduced capacity. Install the OEM part for smooth, balanced airflow.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081112961395,"sku":"LNX-21709","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-blower-wheel-LNX-21709.jpg?v=1783759473","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-blower-wheel-21709","provider":"National HVAC Parts","version":"1.0","type":"link"}