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TMG-GH820 8' x 20' Aluminum Frame Greenhouse with Twin-Wall Polycarbonate Panels, Air Vents, 4mm Twin-Walls


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Product Description

TMG Industrial carries a wide variety of cold frame tunnel greenhouse grow tents designed for anyone from a home gardening enthusiast to a sizeable commercial produce grower. With over 30 different sizes and styles available and cover materials ranging from polycarbonate panels, ripstop leno tarps and EVA plastic films, TMG Industrial has become one of the leading cold frame greenhouse distributors across Canada and the USA.

TMG-GH820 8 x 20 feet aluminum frame greenhouse with twin-wall polycarbonate panels allows you to get a head start with your seedlings and helps your plants survive the frost in the fall. This newly improved model has been redesigned to reinforce the structure with bracing bars and base anchors added, the twin-wall polycarbonate panels allow natural lighting to pass through the entire structure, the rooftop vents provide fresh air ventilation, and the 43’’ wide walk-through swing door is ideal to steer a wheelbarrow or a landscaping cart right through it.  This greenhouse will bring the benefit of hardening your plants from day one, reducing the risk of losing plants after transplanting, and helping you double your growing seasons.

This greenhouse is not engineered to handle snow and wind load. If you live somewhere snow and harsh weather are a concern, this is not the right fit for you! 

This product is backed with a one-year manufacturer warranty, customer service and spare parts are supported from our headquarters located in Richmond, BC. We are proud to provide free shipping to most locations in Canada and the USA lower 48 states for the purchase of this product.


  • Easily slide and lock the panels into the aluminum frames
  • Rust-resistant, corrosion-free aluminum base bars and frames
  • Twin wall polycarbonate panels diffuse direct sunlight and keep warm
  • All panels are UV protected to block harmful solar UV rays
  • Manual roof vents, rain gutter, and aluminum ground base bars
  • Assembly required and tools are included


  • Exact floor footprint: 7.8'(W) x 20.2'(L)
  • Sidewall height: 62''
  • Ridge height: 89''
  • Truss spacing: 24”
  • Bi-parting swing open door: 43''(W) x 72''(H)
  • Polycarbonate panel wall: twin-wall, 4mm thick
  • Roof vents: 4


  • Packed in a wood crate shipping box
  • Shipping dimension: 75” x 30” x 17”
  • Shipping weight: 264 lb