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M2G Advanced Load Monitoring (ALM) Boiler Controller

The M2G is an advanced intelligent boiler control that optimizes the heating efficiency of hot water boilers. A unit attached to each boiler monitors the temperature of the water in the
flow and return every 10 seconds. With energy savings and carbon emission savings of
10%-25% and a reduction in cycling of over 50%, Greffen has become the industry
leader in boiler cycling control.


Greffen UV-C Germicidal Lamps:

Greffen offers a wide range of UV-C Germicidal lamp technologies including upper-air units as well as in-duct UV-C lighting. All of the technology offered by Greffen is the same 253.7 nm technology that has been well proven for years to sterilize hospital operating rooms.

Mountainous Landscape by the Sea


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.


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