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Immediate Release – Sustain Charlotte Announces Partnerships

CNBC – Press Release

U.S. Department of Energy is confirming Greffen Systems’ M2G intelligent boiler control produces significant savings for heating buildings using hydronic boilers. The DOE’s “Building America Case Study,” which installed and monitored Advanced Load Monitoring (ALM) aftermarket controllers in Chicago.

“The Department of Energy’s validation means government affirmation of a key tool for saving money,” said Frank Salensky, Greffen Systems’ CEO. “For those Chief Sustainability Officers and Energy Managers of industrial and commercial buildings who are seeking the next tier of proven solutions, the M2G is an exciting new tool.”

Dow Jones & Company – Market Watch – Press Release

Greffen Systems reports the return on investment for the M2G can generally be seen within 6 to 24 months. “But savings extend beyond the fuel bill,” noted Salensky. “A boiler’s life is increased significantly because of the more effective control and subsequent reduced firing.”

Reuters – Press Release

The M2G has been installed and tested by companies, and governmental and educational institutions including Ford Motor Company, General Motors, Bell Helicopter, the U.S. Internal Revenue Service, Yahoo!, Texas A & M University, and Detroit Edison. In Europe, the M2G has been installed at over 5,000 sites by companies including the Royal Bank of Scotland, Lloyd’s TSB, and Britain’s National Health Service, among others.

Bloomberg – Press Release

Greffen Systems’ M2G is a small, easily-installed ALM controller that requires no calibration, works with existing building management control systems and significantly reduces energy consumption by minimizing boiler firing during periods of low heating load. The M2G’s microprocessor “learns” from the temperature change of the primary heating loop to detect real building heating requirements and dynamically manages the boiler to save energy during low-load conditions.


Greffen Systems has been providing innovative technologies for the HVAC industry in both the public and private sectors since 2008.  Greffen is your full-service M2G Advanced Load Monitoring (ALM) Boiler Controller and UV-C germicidal light vendor. Greffen offers design, project management, installation, testing and ongoing support for our products.


Greffen Systems, Inc.

49 Dogwood Court
Dawsonville, GA 30534

Phone: 888-544-4733
eFax: 678-550-5200

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