C-N-O Comfort Zone has the Packaged Unit You Need for Year-Round Comfort Ask around and people will tell you they could use more indoor space. C-N-O Comfort Zone in Saint Peters has a smart, compact solution for you: a packaged HVAC system. Supplying comfortable indoor air month after month, a packaged system is designed to incorporate the components of a common split system into one compact cabinet. Plus, it’s a snap to install in almost any residence, either outside your home or fitted to your roof. The unit allows you to use more of your indoor space! When they are shopping for an HVAC system, people rank energy efficiency at the top of their must-have benefits list. With energy ratings as high as 15.00 SEER* and 8.00 HSPF,** our packaged units fill this need. In fact, our Dave Lennox Signature® Collection units are all ENERGY STAR® qualified. C-N-O Comfort Zone has the ideal packaged system for your must-have list and your budget. Explore our options. Dave Lennox Signature® Collection ELITE® Series MERIT® Series C-N-O Comfort Zone in Saint Peters is here for you, whether you’re shopping for a new packaged unit or want an expert to service your existing system. Schedule your appointment online today or call us at 636-578-1777 to see how we can serve you. *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.