is a solutions integrator combining the best technologies to suit your needs.

Serving Massachusetts and Rhode Island for 25+ years.

from design to completion

From design to installation, we oversee our projects from start to finish. Services include CAD, Scheduling, Networking, Control Panel Layout and Wiring

energy management systems

HTML5 UX giving you control from any device. Support for Modbus and BACNet  allow for seamless integration of HVAC equipment, lighting and more


BTU, water, steam, electric power metering and tenant billing. 

indoor air quality

Indoor air quality is now more crucial than ever. We provide ultraviolet disinfection, CO2 monitoring, garage exhaust systems, gas calibration and more.

sales & services

Through our network, our customers have access to an expansive catalog of HVAC and lighting parts. We also provide continuous service on all our installations as well as 3rd party American Auto Matrix installations



Gwynn Systems, Inc was incorporated in September of 1990 by Gerald R. Keller and Francis J. Nash Jr. PE. Gwynn Systems, Inc was formerly the Energy Management Division of John B. Gwynn, Inc which specialized on pneumatic controls. However, with the emergence of direct digital controls, Gerald R. Keller and Francis J. Nash redirected their resources towards the emerging technology and formed a fully direct digital control building management system company currently known as Gwynn Systems, Inc. We were one of the pioneers to offer DDC in New England. The DDC controls we installed then were made by American Auto-Matrix. They were one of the first to offer open architecture, generation to generation compatibility and direct digital control. Gwynn Systems relationship for over 25+ years with American Auto-Matrix has given our customers the ability to receive the best of the best in record time.  We were pioneers then and continue to innovate now, with one of the first building management systems with a HTML5 interface. One thing in our history remains unchanged, our commitment to our clients.

Our Mission

Our mission is defined by our commitment to our clients to exceed their expectations as a business norm. At Gwynn Systems, Inc., it is not simply enough to fully satisfy our customers, this to us is a business fundamental. Better yet, our goal has always been to exceed our customers' expectations through every interaction. From the first meeting to the ongoing support years down the line after project completion. We do not only pride ourselves in constructing robust building management systems, but most importantly we pride ourselves in our long lasting relationships with our customers.

What we do

We specialize in Digital Control Systems such as but not limited to:

  • Building Management System

  • Energy metering and billing

  • Lighting controls

  • Air flow controls

  • Water flow controls

  • Air Quality controls

We conform with industry standards such as but not limited to:



Head Office

39 Hayden Dr,

Foxborough, MA 02035, USA

Contact us at:





PO Box 37

Foxborough, MA 02035, USA

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Service Request
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