National Mechanical Services has been in business for 25 years servicing all of its commercial and industrial customers on a 24-hour basis.

We pride ourselves on the quality of our service, along with a response time of four hours or less.

Our service technicians are fully licensed, with both EPA and Massachusetts’s licenses.
We are also factory trained for a wide range of products.

The services provided by NMS are as follows:

• 24 hour HVAC (Heating, Ventilating, and Air Conditioning)and Refrigeration service
• Service on all refrigeration equipment with fluorocarbon refrigerant to unlimited horse power
• Process cooling equipment 300 tons and under
• All types of environmental chambers
• Ductless air conditioning and heat pumps
• Computer room equipment
• Building air conditioning equipment including BMS systems in concert with O’Leary Energy Controls
• Installation of all equipment serviced
• Cold storage facilities
• Ice Machines
• Vacuum cooling
• And More