TOTALLY ENCLOSED FACILITIES

Positive Pressure Ventilation

Positive pressure cooling systems pull outside ambient air into a cooling chamber where the air is screened for bugs, then chilled through evaporation. This bug free chilled air is then forced into the greenhouse through ducts to distribute the air to the other end of the greenhouse allowing it to escape the duct along its journey.

Fan & Pad Negative Pressure Cooling

Negative Pressure cooling uses exhaust fans at one end of the greenhouse to pull or exchange the air in the greenhouse out of the building with fresh outside ambient air temperature at least once per minute. The temperature can be lowered through evaporation of a simple pad system or cool cell. As the air is chilled through evaporation, it is pulledto the opposite end of the greenhouse andforced out of the building through the exhaust fans.

Natural Ventilation

Natural ventilation operates on the principle that heat is removed from the greenhouse by wind and temperature differences between the inside and outside of the greenhouse. When ridge vents are used, the hot air inside the greenhouse will rise and escape through the roof opening. The greater the difference in temperature between the inside and the outside of the greenhouse, the greater the results.