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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 plus tax(es)

Strap assembly to secure 1.5" webstrap.
Ideal for use in light deprivation.
more info
greenhouse venting
Roll Up Wall Restraining Straps with Hardware
Price: $8.50 plus tax(es)

Strap sets to hold roll-up walls against the frame. Install next to the arches, 8 to 10' apart. Polypropylene webbing, 1.5” wide X 7’ with barbed grommets.

Complete with all baseboard and springlock hardware.

Can also be supplied with an Eye To 3/8" Threaded Connector for retrofitting cord systems into web-strap restraining systems - no additional cost!
more info
greenhouse venting
Eye To 3/8" Threaded Connector
Price: $14.50 plus tax(es)

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 plus tax(es)

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

Use with Chain Pull Gear Cranks, 5:1, self locking.
more info
Roll Up Motor, partial install kits for Venting
Roll Up Motor, partial install kits for Venting
Price: $15.75 plus tax(es)

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

Tubes supplied by the customer.
more info
greenhouse tube-grip
greenhouse tubegrip
Tubegrip, 19 mm (3/4") 20
Price: $17.00 plus tax(es)

Attach poly to pipes or tubes 19 mm (3/4") outside diameter.
Works with 1/2" electrical conduit.
20 per order.
more info
springlock s-hook
springlock s-hook
Price: $18.00 plus tax(es)

40 per order
Fits any springlock base.
Use with braided cord and eyebolts to hold roll up walls against the greenhouse frame.
more info
greenhouse roll-up sidewalls
Standard Installation Hardware for Gear Cranks
Price: $18.50 plus tax(es)

Guide Tube, 2 M (6.56') with installation hardware. more info
greenhouse snap clips
Tubegrip, 32 mm (1 1/4") 20
Price: $20.00 plus tax(es)

Attach poly to 32 mm (1 1/4") outside diameter pipe or tube.
Use with 1" electrical conduit and water pipe; and 1-3/8" fence tube.
20 per order
more info