Experience Exceptional Comfort Year-Round with a Packaged Unit from M & S Heating & Air LLC When space in your home is valuable to you, look to M & S Heating & Air LLC in Mechanicsville for a compact solution that will keep you comfortable season to season—a packaged system. An HVAC packaged unit works like a traditional split system; it’s just designed to fit into a streamlined cabinet for flexible installation in nearly any residence Because your indoor space is valuable, the unit can be installed outside or on your roof. We understand that energy efficiency is a top priority when you’re selecting a packaged unit, just as it would be when selecing any other HVAC system. The Lennox® packaged units we offer have earned energy ratings up to 15.00 SEER* and 8.00 HSPF.** What’s more, every unit in the Dave Lennox Signature® Collection are ENERGY STAR® qualified. All of our AC units have a lot to offer, and we’ve got a model for every budget. See for yourself! If you’re looking for a new packaged unit or want an expert to help maintain yours, look to M & S Heating & Air LLC in Mechanicsville. We’re here to help. Call us at 301-363-4699 or book your appointment online today! * SEER, or Seasonal Energy Efficiency Ratio, measures the cooling efficiency of your air conditioner or heat pump. A higher SEER rating means greater energy efficiency and more savings for you and the environment. ** HSPF, or Heating Seasonal Performance Factor, measures the heating efficiency of your heat pump. A higher HSPF rating means greater energy efficiency, more savings and is better for the environment. New!