McCarl's Preferred Services is a commercial and industrial HVAC service contractor located in Central Pennsylvania. We specialize in planned maintenance, HVAC & plumbing service, replacements and new installations. Our skilled technicians have worked in countless facilities throughout our region including: medical buildings, manufacturing plants, industrial facilities, educational institutions, government buildings, office buildings, banks, and churches. With over 15 years in the HVAC market, you can be sure that your planned maintenance, repair and new installation work will be done correctly the first time... "The McCarl Way"