Greenhill EnviroTechnologies is the first and only 
creator, manufacturer and distributor of 
intelligent, variable-speed fan control systems 

Okapi Fan Control Systems for Solar Collector Air Heaters

                                                                                              

Using sophisticated micro-controller programming,
 powerful variable-speed fans, wiring and multiple sensors,
our Okapi Fan Control Systems are designed to 
maximize your solar heat harvest and minimize your heating bills.



If you have made your own solar air heater 
(pop-can, beer-can, down-spout, screen or any other closed-loop design) 
you will find that a simple snap-disc switch does not do justice
 to your hours of planning and careful work.



You need a fan control system that is:
              • Fully automatic, 
              • Able to change the speed of the fan according to the sun exposure,
              • Pumps the air out at floor level 
              • And keeps running until all of the heat is harvested.


 You need a fan control system that truly puts your solar furnace to work for you. 



Learn more about Okapi Fan Control Systems available for purchase here. 


 here on our website.
 
Greenhill EnviroTechnologies Inc. Okapi Systems Brand


This is the innovation in solar air heating technology everyone has been waiting for: 
remain passive no longer! 


Buy your Okapi Fan Control System today. 


Prepare for winter and prepare for that amazing feeling:
 knowing you are polluting less and saving hundreds.



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