Upper Front Vents: 29

8mm Twin-Wall Polycarbonate Panels: Provides exceptional insulation with three dead air spaces for maximum heat retention and energy efficiency

Use T-bolt screws for compatible aluminum greenhouse frame profiles

Replacement is inexpensive and easy

The house itself features twin-wall panels that diffuse the light and increase insulation

Janssens | Custom Greenhouse Color Food Prep Upper Front Vents: 29Choose a Custom Color for your Janssens Greenhouse. The 216 available colors are from the RAL Classic color family. If a custom color is chosen, the price of the greenhouse itself also changes: 15% higher PLUS the cost of the color. Choosing a custom color for your greenhouse adds a 14 to 16 weeks shipping turnaround from the Janssens factory in Lier, Belgium. You can see a list of the RAL Classic colors on Wikipedia with small color swatches, and