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  • from $29.95

    Replacement Power Tube w/ Lock Washer for Bayliss MK7 Triple Spring

    Select temperature range: #1 Standard Tube Replacement for Bayliss Triple Spring & Hydraulicheck Solar-Powered vent openers (C3503 & C3509)...

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    from $29.95
  • $56.00

    Univent Automatic Vent Opener

    Multiple uses - C3515 This unique solar vent control will open and close roof vents, a cold frame lid, top-hinged wall vents, or even the greenho...

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    $56.00
  • A video guide on how to install the Mk7 Auto vent fitting in a greenhouse.
    $74.95

    Bayliss MK7 Triple Spring Solar Vent Opener

    Harness the sun for automatic ventilation! - C3503 The Bayliss MK7 Triple Spring solar vent opener is the best choice for top-hinged wall vents. It...

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    $74.95
  • $19.95

    Replacement Cylinder for Orbesen Teknik Standard Solar Openers

    For use with C3515 Univent, 3527 Optivent, 3521 Sesam Spiro, 3511 Sesam Solarlift, C4000 Ventomax, and C3533 Liberty Louver Solar-Powered Vent Open...

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    $19.95
  • $49.95

    Liberty Automatic Louver Opener

    For automatic ventilation - C3533 The Sesam Liberty solar-powered control will open and close a louver window as temperatures change, enhancing a...

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    $49.95
  • $99.95

    Bayliss MK7 Hydraulicheck Solar Vent Opener

    Heavy-Duty Control The Bayliss MK7 Hydraulicheck solar vent opener is the best choice for large roof vents and side-hinged wall vents. A built-in...

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    $99.95
  • Out of Stock
    $59.50
    $56.00

    Bayliss XL Single Spring Vent Opener

    Simple, strong and easy to install Budget “clip-on” model lifting a load of up to 12 lbs. giving a maximum opening of approximately 12″. The unit m...

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    $59.50
    $56.00
    Out of Stock
  • A video demonstrating how to install the Bayliss MK 7 Auto vent on your greenhouse.
    $84.95

    Bayliss MK7 Orchid Solar Vent Opener

    For tropical greenhouses This Bayliss MK7 orchid solar vent opener control operates at a higher temperature than other similar openers, allowing ...

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    $84.95
  • An image illustrating how to use manual vent controls to keep a rooftop vent open
    $79.95

    Manual Vent Control

    With linear gear drive - C3535 Lift heavy vents or skylights with this precision-built vent control. Smooth running gears lift and hold vent at a...

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    $79.95
  • Manual Vent Control Extension Handle displayed on a white background with a close-up of the hook part.
    from $54.00

    Extension Handle for Manual Vent Control

    For use with C3535 Manual Vent Control - C3537 Now reach those out-of-reach skylight operators or vent controls more conveniently. Telescoping for ...

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    from $54.00
  • Replacement Cylinder for Giga Vent Control displayed on a white background
    $68.00

    Gigavent Replacement Cylinder

    For use with Gigavent Control C3526 from Orbesen Teknik in Denmark. Cylinder color is black with ridges.  

    $68.00
  • A photo showing the use of the Giga Vent Control
    $154.50

    Gigavent Control

    Heaviest lifting capacity The ultimate solar vent control! Opens and closes vents weighing up to 65 lbs. A hydraulic safety damper prevents gusty w...

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    $154.50
  • Bayliss Super Solar Vent Opener displayed on a white background
    $198.00

    Bayliss MK7 Super Solar Vent Opener

    Heavy Lifting Capacity This larger, heavy-duty Bayliss MK7 Super solar vent opener is suitable for operating heavy, double-glazed greenhouse vent...

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    $198.00
  • $99.00

    Megavent Control, aluminum color

    With a 26-lb. lifting capacity, twice that of standard solar openers, the Megavent is the best choice for heavier roof vents, side windows, and sky...

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    $99.00
  • $32.00

    Megavent Replacement Cylinder

    For use with Megavent solar-powered opener (C3530) from Orbesen Teknik in Denmark. Cylinder color is black, 1" diameter and smooth.

    $32.00