Lennox 20W14 3 Blade Fan Assembly. Lennox goal is to provide contractors with high-quality HVAC solutions and replacement parts. This system includes changes and inventory updates to ensure peak performance. Lennox has a large line up parts and products for high-efficiency packaged rooftop units, split systems, HVAC controls, furnaces and indoor air quality products. This Lennox 20W14 3 Blade Fan Assembly has a 22" diameter, and is designed for outdoor air conditioning units. The increased air flow throughout the system is ideal for maximum comfort inside the home.