Reliable. Trusted. Guaranteed. Thats how youd describe our family of services here at No-Frost Air Conditioning & Heating Co. Since 1971 your friends and neighbors have counted on our no-nonsense approach to servicing Howard, Baltimore & Carroll Counties heating, ventilation and air conditioning needs. We provide authorized warranty service for Trane, Rheem, Carrier, Comfortmaker and Goodman. We also provide post-warranty service for all makes and models. Our service fleet utilizes the latest diagnostic technologies to quickly and efficiently determine the nature of your service problem. Our technicians are fully trained and certified by the State of Maryland. We have our own sheet metal shop on the premise. We do not use sub-contractors.