SKU: 5544370167

Sigma 3 x 1.4 ft. Automatic Roof Vent

Sale price$85.50 Regular price$95.00
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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31

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Description

Sigma 3 x 1.4 ft. Automatic Roof VentSupercharge your Sigma Greenhouse with the Sigma Automatic Roof Vent. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease free. The automatic roof vent is heat activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shriveling or withering of your plants. Sigma Automatic Roof Vent Features: Made from galvanized steel and

Supercharge your Sigma Greenhouse with the Sigma Automatic Roof Vent. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease-free.

The automatic roof vent is heat-activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shriveling or withering of your plants.

Sigma Automatic Roof Vent Features:

  • Made from galvanized steel and polycarbonate for long-lasting durability
  • Automatic, heat-activated opening
  • Rust-resistant and low maintenance year-round.
  • Simple design for fast and easy installation.
  • 3′ × 1.4′ size

Please note: this window only fits Sigma Greenhouse models.

Additional Information:
Sigma Roof Vent Installation Manual (PDF)

The number of windows recommended depends on the size of the greenhouse, the environment you’re located, and the types of plants that you’re planning on growing. The following numbers, however, are good a starting point:

  • Sigma Urban (10x13): 2-4 windows
  • Sigma 20 (10x19.5): 4-6 windows
  • Sigma 26 (10x26): 6 windows
  • Sigma 32 (10x32): 6-8 windows

It's recommended to install an even number of roof vents on either side of the greenhouse for optimum airflow.

Technical data:

  • Size: 3 ft wide by 1.4 ft tall (91.4 cm by 42.6 cm)
  • Maximum window opening: approximately 45cm (17 23/32 in) depending on adjustment and load
  • Start opening temperature: 17 °C-25°C (62,60°F-77°F)
  • Maximum opening temperature: 30 °C (86°F)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 5544370167

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Lyric
Omaha, US
★★★★★ 5
Nice Floating Shelves
Color: Oak, Size: 24" W x 7" D x 1.5" H (2 pieces), Color: Oak, Size: 24" W x 7" D x 1.5" H (2 pieces)
I wasn't sure how to fill this space between my kitchen cabinets, and I think these shelves turned out looking great and fit the space nicely. They were easy to install, good quality, and could handle a decent amount of weight.
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Reviewed in the United States on March 26, 2026
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Christine Menzer
San Leandro, US
★★★★★ 5
My perfect shelves a must buy
Color: Black, Size: 24" W x 7" D x 1.5" H (2 pieces)
Works perfectly and looks great and easy to install. And holds a lot
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
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Verified Purchase
Christopher Slater
Port Orchard, US
★★★★★ 4
Floating Shelves
Color: Black, Size: 24" W x 7" D x 1.5" H (2 pieces)
These shelves worked for the space we had.
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Reviewed in the United States on January 24, 2026
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Verified Purchase
Jan Suren
Pawtucket, US
★★★★★ 5
Good enough
Color: Oak, Size: 24" W x 7" D x 1.5" H (2 pieces)
It’s a cheap shelf but it works for a starter apartment
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Reviewed in the United States on February 14, 2026
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mps
Charlottesville, US
★★★★★ 5
Easy and good looking.
Color: Black, Size: 24" W x 7" D x 1.5" H (2 pieces)
Installation is pretty straight forward. Small level is included to make sure they are put up correctly. They look good up on the wall.
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Reviewed in the United States on December 3, 2025

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