Tunnel Greenhouses

Tunnel greenhouses are three-season greenhouses that offer growers several economic advantages. This range includes two models: “Cold Layer” and TunnelPro.

Cold Layer

Growers often need additional growing space or a protected area outside the production greenhouse for their plants. The individual “cold layer” greenhouse is a quick and economical solution for increasing the growing area.

Tunnel Greenhouse Features

Provides an ideal environment for hardening off perennials and shrubs;
Frees up the main production greenhouses when plants are awaiting shipment;
Provides a protected area for plants to grow to desired size.

Tunnel Greenhouse Uses

Seasonal production (perennials, annuals, nurseries);
Temporary retail space;
Small-scale organic or conventional vegetable, fruit and herb production.

Technical Specifications

Available widths: 20 ft.
Choice of foundations :
- Tubes and anchor rods (concrete not required)
- Anchor plates for existing concrete foundation
- Anchor tubes for new concrete foundation (posts or continuous foundation)

Coating : Single polyethylene
Ventilation: Lateral roll-up
Choice of doors :
- Single or double door
- Sliding or hinged

Available tunnel models

The “Cold Layer” greenhouse is an economical model that provides a quick solution for growers looking for extra space. It can also be easily modified to become an freestanding Ovaltech greenhouse and thus become a 4-season greenhouse.

Contact a Harnois expert to determine which greenhouse is best suited to your needs.

TunnelPro Plus

Field berry growers such as strawberries are increasingly turning to high-tunnels to
protect large areas of crops from the increasing weather varia

Ideal for small fruits and open-field growers

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Greenhouse Caractheristics

Gothic profile: 18’ height creates a higher air volume, providing more stable temperatures
Excellent air exchange ratio and circulation
Sturdy structure and quick installation
Full access to the tractor & workforce

Greenhouse Benefits

Better climate mangement (temperature & humidity) inside the tunnel to extend the growing season.
Strongest high-tunnel on the market with snow & wind load resistance.
Economical solution to protect against adverse weather conditions, pests, and diseases.
Requires minimal site preparation.
Three-Season solution, poly film must be uncover in snowy area(more than 3” of snow).
Optimized for higher crop density (up to 8 rows of gutter per tunnel)