Since 1945, O.L. Jacobs has proudly provided Central Pennsylvania with the following commercial industrial mechanical services:

- Rooftop HVAC Units
- Chillers and Cooling Towers (Water and Air Cooled)
- Process Piping
- Commercial Plumbing Services
- Boilers
- Heat Pumps and Furnaces
- Fans, Pumps and Motors
- Sheet Metal Fabrication and Installation
- Design Build Services
- Humidification/Dehumidification
- Electrical Services
- Energy Management
- Honeywell Energy Management Controls
- Preventative Maintenance
- Solar
- 24 Hour Emergency Service

Learn more about our residential and light commercial capabilities including heating, cooling, geothermal and solar services