Lennox 15M84 Compressor - ZR57K3-PFV 5T. 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 High-Efficiency Compressor is designed to operate smoother and better than a conventional compressor. The Lennox 15M84 Compressor also helps to regulate temperatures within your home, which means you'll be far more comfortable. This compressor is ideal for maximizing comfort and eliminating cost.