Price: $65 - $70
AVAILABILITY:
Availability: In Stock - Usually ships in 1 to 2 days.
BAYLISS MODEL:

These Bayliss MK7 openers have three heavy-duty springs which gives the opener superior closing power making it ideal for side wall vents and roof vents in windy areas. Opening temperature is adjustable (Ranges shown below). Maximum opening of 12" is reached at approximately 20° to 30°F above opening temperature. Bayliss MK7 vent openers are made from the best corrosion resistant materials: stainless steel, anodized aluminum, and brass. These are recommended for use with Cross Country greenhouse vents. Powertubes are interchangeable.

Bayliss MK7 vent openers are available with 2 different models. The only difference is the operational temperatures of the powertube. The Orchid Wax model allows you to heat the greenhouse to higher temperatures for tropical plants in cold weather.

Bayliss MK7 Features

  • Adjustable temperature range:
    - Standard initial opening temperature range: 55° F to 70° F
        (Recommended for most applications)
    - Orchid Wax initial opening temperature range: 75° F to 90° F
        (Heating to high temperatures in winter)
  • Maximum opening of 12"
  • Recommended for vents up to 30 lbs. total weight
  • Equipped with 3 heavy duty springs for windy locations
  • Made in the United Kingdom


How does a Greenhouse Autovent work?
A strong metal tube contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston.


Product Manuals, Tips, Specs, & Guides

Bayliss MK7 Vent Opener Dimensions
Bayliss MK7 Vent Opener Installation Manual


Item # 8040105, 8040106

Overall Customer Rating of 21 Reviews:
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Tennessee

Quality product

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Easy to install and I went with the one that had springs because I live in a windy area.

Fast and Efficient

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The order came very quickly and was exactly what I needed.

happy venting

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Put this in a small greenhouse with light weight roof panels. Works wonderfully.

Works well

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Works very well in my homemade greenhouse. The closing springs are very strong.

California

Works Perfectly

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Madam's Woman cave also known as he Orchid greenhouse needs these as the outside temperature range from 40 degrees F to 100 degrees F on the same day. They work perfectly opening and closing the vents as needed.