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Greenhouse ventilation is influenced by many factors, the objective is to hold the temperature in the optimal range for the crop. Steady temperature can be achieved, year-round, with a combination of: roll up greenhouse sides, HAF fans, thermal openers and roll up motors.
Chain pull cranks are used as a manual opener for rack and pinion vents, light deprivation and blackout systems.

Use tubelock with motorized systems (because of the added torque); and for roll up roof vents (together, tubelock and tube create a very straight combination).

Attach
the poly to the roll up tube with tubegrips (24" apart) for sidewall applications with manual drives (inline and gear cranks). Inexpensive, fast and easy to adjust - 32 mm works with 1-3/8" tube.

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greenhouse venting
Strap Assembly
Price: $4.25

Strap assembly to secure 1.5" webstrap.
Ideal for use in light deprivation.
more info
greenhouse venting
Roll-Up Shock-Load Wind Restraint Strap
Price: $9.75

Strap sets to hold roll-up walls against the frame. Install next to arches, 8' to 10' apart. Polypropylene webbing, 1.5" wide x 7' with advanced unique shock-load brackets.

Complete with all baseboard and springlock hardware.

Can also be applied to the Agricultural Trade for Ag Curtain venting systems
more info
springlock s-hook
springlock s-hook (extra firm hold)
Price: $10.00

Attaches cord to springlock base.
Used in wind restraint systems for roll up walls and to tie shade cloth to a greenhouse.
For the roll up wall application cord is "laced", between the s-hook and eyebolts (attached to the baseboards), to hold the roll up tube against the frame.
The cord is "laced" in a zig-zag pattern, making it difficult to take crop out the sides.
20 per order.

Can also be applied to the Agricultural Trade for Ag Curtain Venting systems.
more info
greenhouse venting
Eye To 3/8" Threaded Connector
Price: $14.50

Improve your existing roll-up system!
10 per order.

Used for retrofitting an existing cord-line roll-up wind restraint system to a web-strap system (see photo).
more info
greenhouse light dep
Roll Up Motor, partial install kit, for light dep
Price: $15.75

Use with 44 or 156 nm motors. more info
greenhouse light dep
Ridge Roll Up, partial install kit, Chain Pull
Price: $15.75

Use with Chain Pull Gear Cranks, 5:1, self locking.

Can also be applied to the Agricultural Trade for Ag Curtain Venting systems.
more info
Roll Up Motor, partial install kits for Venting
Roll Up Motor, partial install kits for Venting
Price: $15.75

Hardware to install the roll up motors for a venting application.

Tubes supplied by the customer.
more info
greenhouse venting
Nylon loop fasteners
Price: $15.75

Nylon loop fasteners for 1 1/2" web strapping

10 per order
more info
greenhouse crank
Gear crank, partial install kit for venting
Price: $15.75

Use with Gear cranks (also heavy duty), 5:1, self locking.

Can also be applied to the Agricultural Trade for Ag Curtain Venting systems.
more info
greenhouse tube-grip
greenhouse tubegrip
Tubegrip, 19 mm (3/4") 20
Price: $17.00

Tube grips are a great way to attach poly (and other films) to your greenhouse frame. Our clips come with stainless steel springs for a non-stick hold. Use with 1/2" (Inside Diameter) - 3/4" (Outside Diameter) pipe or electrical conduit. All tubegrips can handle load from only one direct point of contact. They will release, if used on interior arches. If building a roll up wall then springlock is used at the top.

20 per order.
more info