Meridian 26094 5 Ton Air Conditioning Condenser #94 Piston. Meridians goal is to provide contractors with high-quality HVAC solutions and replacement parts. This system includes changes and inventory updates to ensure peak performance. Meridian 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 Meridian 26094 #94 Piston is specifically designed to improve the operation on a 5 Ton Air Conditioning Condenser.