Greenhouse ventilation means many things to different people. To some it is air conditioning with fan and pad cooling. With others it is natural ventilation, using roll-up sidewalls, automatic ventilators for roof, sides and ends. One popular method is the Fan-Jet exhaust/fan ventilation system. Other methods use exhaust fan with automatic or motorized shutters. Some ventilation is the use of insect or predator natural ventilation with air moving through the screen by natural wind action. Ventilation systems are also used to protect greenhouses during cold temperatures to prevent cold air from infiltrating into the house.

• Fans
• Motorized Shutters
• Air Conditioning
• Insect Screen
• Pads
• Roll-up Curtain Walls
• Roll-A-Roof

Vents are used for both natural and mechanical ventilation systems. The following include sidewall vents, roof vents, wall shutters, and rollup sidewalls. Special systems are designed and available for a wide variety of uses in agricultural and greenhouse buildings.

Side or end wall vents

A. Side Wall Vents (for new or existing structures):

• 3' (91cm) or 4' (122cm) Single or Double Motorized Vents with or without Manual Override or just Manual. Many covering options.
• Roll Up sidewalls - Manual or Mechanical. All types and qualities of Poly/Screen/Heavy film, Blackout, etc. For Plant, Poultry, Hog, and Animal uses.
• Inflatable Tube or Double Poly roll up vents.
• Motorized Shutters of all sizes.
  
  

B. Roof Vents (for new or existing structures):

• 3' (91cm) or 4' (122cm) Single or double motorized Vents with or without manual or override or just manual.
• Insect screen Vents for Peak houses.
• Vents for special situations such as Ventsetter type or Econo Grower , Roll-A-Roof

D. Fan-Jet Systems - See Fan - Jet section under

Single end wall vent on nexus greenhouse

Flo - Master Aluminum Wall Shutters

• Corrosion resistant heavy gauge aluminum frame.
• Precision counterbalanced aluminum blades open easier, wider to permit higher fan capacity.
• Nylon bearings throughout are corrosion proof to help prevent sticking. Suitable for dusty or humid applications.
• Stainless steel hinge pins will not rust, insure easy positive blade action.
• All shutter blades are reinforced with polished galvanized steel rods, and equipped with double tie - rods.
• Automatic - Used with exhaust fans, opens automatically when fan is on, closes automatically when fan is off.
• Keeps out wind, rain and back drafts when fan is not in operation.

Motorized Inlet Shutters

• New cam pulley operator - provides long life to motor - corrosion resistant.
• Motor draws only 17 watts.
• WAAC models are center pivoted to open easier against house static pressures.
• Motors are available in 24v, 115v, 230v, 460v, (Specify Voltage Required ).

Flo Master end wall vent on Quonsetter for seed
production house Jacklin Seed

Double side wall vent

Inflatable side vent

Poly vent Inflatable Side and Endwall Ventilation System

This system provides on airtight seal on both top and bottom for the full length of the green house. It will open as the thermostat calls for ventilation. The Poly - Vent^® wall acts as an insulator with it's dead air space when fully inflated. The easy to install frame can be placed into existing structures.

Specifications:

• Vent sizes 24",36", 48"and 60"
• Frame material 24GA. galvanized sheet metal
• Poly - Vent material 6 mil UV treated polyethylene

Roll-Up Curtain Walls

Roll-up curtain walls can be custom fit to match your requirements. Combined with the Palmetto roof vent system, they make one of the best passive ventilation systems available. You can roll-up virtually 100% of your walls for total air circulation.

Unique drive system places the curtain drive pipe in the center of the curtain rather than the bottom when the curtain is closed. To open the curtain, the drive pipe moves upward with the top and bottom sections wrapping around it.

AirLOC Roll-Up Vent

This system keeps the motor drive away from moisture and other contaminants near the ground and reduces the amount of motor travel by 50%! The curtains are raised and lowered with either a Somfy gear motor or a manual crank gearbox.

The motor may be located at the end or middle of the curtain. Motor and ends are covered with a vertical skirt both inside and outside. The bottom of the curtain is weighted with an additional pipe.

New AIRLOC roll-up vent, is a great, inexpensive alternative to a power vent system, while retaining all the benefits of one. Available in sizes from 2-6 feet high and 10-30 feet long with either PAK 8010 White or 1212C Clear film. Heavy-duty, industrial grade Velcro perimeter seals keep wind and weather outside.