York air conditioning dealer – 67 years.

M. S. Johnston Co. entered the HVAC industry in 1939 by becoming an authorized York air conditioning distributor. Through 67 years of continuous operation in this industry we have developed a staff of professionals who provide quality design, installation and service work.

Our HVAC division offers commercial, industrial and institutional design/build and plan and spec installation and service for most types of HVAC systems. Major customers include shopping centers, manufacturing firms, computer centers, nursing homes, schools, churches, government buildings and office complexes.

We have our own state-of-the-art sheet metal shop for ductwork fabrication, as well as field crews for installation.

Solid management, with expertise at all levels of our operation, assures quality work at competitive prices for our customers.