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 condensed solution that will keep your home comfortable month after month—a packaged system. An HVAC packaged unit works like a traditional split system; it’s just designed to fit into a compact 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 carry energy ratings up to 15.00 SEER* and 8.00 HSPF.** Plus, 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 shopping for a new packaged unit or need an expert to help maintain yours, look to M & S Heating & Air LLC in Mechanicsville. We will take care of you. Call us at 301-363-4699 or schedule 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!