Frequently Asked Questions (FAQ)

What is evaporative pad cooling for greenhouses like the Grand Teton?

Evaporative pad cooling, often known as a pad-and-fan evaporative cooling, uses wet cooling pads and exhaust fans to lower greenhouse temperatures through evaporation.

As water changes from a liquid to a vapor, it absorbs a considerable amount of heat from the surrounding air.

Warm outside air is drawn through the cooling pads. As the water evaporates, it absorbs heat from the air to cool the greenhouse environment.

For growers who have challenges with passive growing due to climate change, the Grand Teton is a great solution for a pad-wall and fan-style growing environment.

What is the difference between polyethylene sheeting and a polycarbonate sheets or panels to cover a greenhouse?

Polyethylene sheeting or poly film is one of the most common, cost-effective soft coverings used on hoophouses, high tunnels, Quonset houses, and other types of greenhouses. It is a flexible film that lasts anywhere from three to five years.

You can install it in a double layer and inflate the space between with a fan for better insulation. Poly film is treated with materials for ultraviolet stabilization to slow down yellowing and cracking. Anti-drip treatments reduce condensation on poly film.

Polycarbonate is a rigid covering material that is bendable enough for use on high tunnels, hoophouses, and other types of greenhouses. It is highly impact-resistant and offers high light transmission and excellent protection from wind, rain, snow, and hail. It lasts anywhere from 10 to 15 years.

The Grand Teton greenhouse adapts to hard or soft coverings without the need to change the structural members of the house. It’s a great choice for growers in colder climates who want to start with a poly-film covering and convert to a rigid covering without major renovations.

Get to Know the Grand Teton

• One-piece factory-welded trusses for strength and easy assembly
• High-strength Tenzaloy column caps and gutter saddles
• Large walkable gutter for easy installation of chosen glazing
• Optional powder-coated frame, flashings, and extrusions
• High-strength, double-toothed steel rack arms offer stronger wind resistance than single-toothed aluminum used in other vents on the market.
• Aluminum flashings and extrusions
• Optional aluminum extruded ridge allows for wider spans of rigid covering and optional rigid roof vents
• Purlin caps channel condensation off the roof and away from the crop