I have been a customer of their service plan for t...

I have been a customer of their service plan for the last couple of years. GSM stopped in to do the regular heating check up. They arrived within the hour of time expected. The technician was thorough with changing filters and checking systems. When completed the technician explained what was done and provided information on the quality of the system. Plus, provided information on an additional device that may assist with filtering household air to provide better air quality. Did the job as expected and in a timely fashion. The service individuals are are always pleasant and courteous.

Services: Cleaning, HVAC maintenance