The Gr effen Systems M2G unit reduces fuel consumption by 10-20% and has a short ROI of less than 24 months by learning the thermodynamics of each boiler system to distinguish between real and false calls for heat. It constantly adjusts its operations to meet ongoing conditions, allowing it to reduce unnecessary firings by 30-50% and lower maintenance costs while not affecting customer comfort. It has been installed in over 4,000 sites in Europe and over 50 sites in the US across all climates.

1. Gr ef fen Systems
Inc.
Green-Efficient-Energy
What it does do...
•Reduce Fuel consumption 10%-20%
•Short ROI- 24 months or less
•Reduce Green House Gases
•Reduce Boiler maintenance

2. “ Cruise Control for your
boiler”...CAM Magazine
3/2010
What it doesn’t do...
•Adversely affect customer’s
comfort
•Increase maintenance costs
•It is not a “time delay” system
Fire and Forget technology for the boiler.
Just hook it up and let it go...

3. What is going on?
... Real Calls vs False Calls
 Real Calls- When there is an actual
demand or need for heat.
 False Calls- When the water temperature
drops due to natural cooling (no actual
demand for heat).

4. What the M2G does...
 By learning the thermodynamics of each
system, the microprocessor can tell the
difference between Real Calls and False
Calls.
 This allows the M2G unit to cut back on
the number of unnecessary firings,
thereby saving fuel costs.

5. How does it work?
The micro-processer based algorithms are designed to
monitor 3 variables,
 Boiler Inside Temperature
 Inlet Temperature
 Outlet Temperature
...and Most Importantly!
 How these variables change over time (i.e.
every 10 seconds).

6. Dynamic vs Static
Control
The M2G constantly adjusts it’s operational
dynamics to meet ongoing conditions.
 Allows for BMS overrides
 Reduce firings by 30-50%
 Reduce Maintenance costs
M

7. Where it
works? units sold in Europe to date.
 Over 4,000
Over 50 sites since early 2010 in the
USA, across all climates...
 Sysco Foods
 Nisbet Building, MSU
 Detroit Mound Road Correctional Facility, MI.
 IRS Facility, GA.
 Hertz
 Nissan
 University of North Texas
 Chicago Public Schools
 Plaza Towers
 L3 Communications

8. For More Details and
Information...
 Please visit their website at:
www.greffensys.com
 Or call 1.888.544-4733