Link4 Corporation

Includes the following heating and cooling equipment:

• HAF fans
  
• Two exhaust fans (single speed)
  
• Cool pad pump
  
• Ridge Vent (s)
  
• Pad vent
  
• Dual overhead heaters

The iGrow controller will monitor the space temperature and humidity within the compartment. 

If the greenhouse compartment is within its setpoint temperature range, the control will turn on the horizontal air flow (HAF) fans. All other equipment is off.

If the compartment temperature falls below the heat setpoint, the controller will turn on the first unit heater fan to return the space temperature  to its setpoint.  If the temperature continues to fall, the second heater fan will be turned on. The controller will turn on the HAF fans during heating.

If the compartment temperature rises above the cool setpoint, the ridge vent will open to its 1st stage.  The HAF fans will be on.  If the temperature continues to rise, the vent will open to its 2nd stage.  If the temperature rises further, the ridge vent will open to its maximum position and the HAF fans will be turned off.  Upon a further rise in temperature, the vent will be closed to a crack position and the pad vent will be opened together with one exhaust fan.  This is stage 4.  If the temperature continues to rise the ridge vent is closed completely and the 2nd exhaust fan is turned on.  For the 6th stage of cooling, the cool pad pump is turned on.