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Various climate controllers to meet your needs


Harnois offers you all the equipment you need to control the climate of your greenhouses

Envirotrol TC-7

Our latest model, the TC-7 modulates the temperature according to more configurations than the TC-4. In addition, it can control relative humidity.

The TC-7 has three modes of operation, each stage with its own offset and its own differential. All are controlled by temperature level and humidity level.

  • Two stages of mechanical ventilation (on-off).
  • Two stages of natural ventilation
  • Two heating stages OR one heating stage and one additional mechanical ventilation stage OR one heating stage and a vaporization stage allowing the increase of relative humidity at a defined level.

Envirotrol TC-4

The Envirotrol TC-4 modulates the temperature on demand according to two configurations:

  • one natural ventilation stage and one heating stage
  • one natural ventilation stage and one mechanical ventilation stage
  • The controls are equipped with a differential and an adjustable offset
  • A temperature sensor (mounted on 12" wire) and the unit can hold three more sensors. Therefore, the unit takes the average of the temperatures read
  • The sensors can be installed up to 150 metres from the controller
  • The opening, closing, stop and run times are independently adjustable
  • Integrated alarm contact

Mechanized ventilation

Harnois offers you a complete range of equipment to modulate your greenhouse climate.

HORIZONTAL AIR CIRCULATION


Horizontal air flow (H.A.F.) provides proper air circulation, eliminates condensation problems, and maintains better temperature consistency and proper dispersion of CO2.

The use of small circulators eliminates the need for circulation tubes. In addition, they are easily moved, enabling modulation of air circulation depending on the needs of the season. A small circulator set is less expensive than a large circulator covering the same surface, and offers greater security in case of failure in one of the motors, affecting only a portion of the air circulation rather than all of it.
 

POSITIVE PRESSURE FAN

Positive pressure fans allow you to change air inside the greenhouse even if furnaces are in operation. This system eliminates the problem of toxic gas backflow in the greenhouse caused by exhaust fans operating at the same time as furnaces.




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788, Blv. Methot, St-Nicolas (QC) CANADA - G7A 3W4 - Toll Free : (888) 278-4776 - Fax : (418) 831-2882