Environmental Controller Overview

  • Vents



    Up to 6 vents can be controlled in one zone; two ridge vents, two side vents and two end vents.

    Vents can be controlled by any combination of the following :-

    • Inside air temperature 
    • Outside air temperature 
    • Wind speed and direction 
    • Raining
    • Humidity
    • Inside humidity.
  • Screens



    • Heron environmental controllers operate either separate thermal and shading screens or one combined screen.
    • Thermal screens can be controlled by time, light, and inside and outside air temperature.
    • Thermal screens have a delayed opening feature to allow gradual air circulation.
    • Shading screens can be controlled by time or light.
    • Two gap positions can be specified for high inside temperatures.
  • Hot Water Heating

    Hot Water Heating


    • Heron controllers operate a hot water motorised valve and a local circulating pump.
    • Hot water heating controls air temperature or minimum and maximum pipe temperature.
    • Hot water heating can be immediately shut off if a specified high vent position is reached.
    • Glasshouse humidity can be reduced by maintaining a minimum pipe temperature.


  • On/Off Heating

    On/Off Heating


    • Heron environmental controllers operate two heaters; a main and a back up heater.
    • Heating can be initiated by a low inside air temperature threshold or by a falling temperature gradient.
    • Heating can be disabled with a specified high vent position.
    • The Back-up heater can be set to start at a lower temperature threshold.
  • Fans



    • Heron environmental controllers can operate two cooling fans and one circulating fan.
    • Circulating fans can be controlled by time or humidity. 
    • Circulating fans can be disabled with high vent position. 
    • The first cooling fan is started when a high inside air temperature threshold is reached.
    • The second cooling fan can be started if a higher inside temperature threshold is reached.


  • Periods



    • Up to four control periods can be specified to allow for different settings throughout the day. 
    • Time periods can be set using “time of day” or astronomic time.


  • Full Range of Sensors

    Full Range of Sensors


    Heron environmental controllers can be integrated with our full range of sensors. 

    • Outside air temperature
    • Aspirated inside temperature
    • Pipe temperature
    • Wind Speed
    • Wind Direction
    • Raining
    • Light
    • Humidity

Environmental Controller Sizes

Single zone controller - 8 or 16 outputs

Multi-zone controllers consist of base and zone modules.

Base and zone modules - 8 or 16 outputs.

Maximum 8 zone modules can be added to 1 base module.