• Propane has heating system. • Frame is manufactured from highest quality Allied Gatorshield structural steel tubing. • End frame is constructed from strong 16 gauge, 1-1/2" square Allied Gatorshield® structural steel tubing. • Ends and top covering are constructed from our 8mm twin-wall polycarbonate sheets that are light in weight, virtually unbreakable, and come with a 10 year warranty. • Panels contain UV inhibitors which prevent degradation. • Built-in condensate control eliminates water droplet formation for a healthier plant environment. • Units come equipped with a 36"W x 80"H heavy duty aluminum entry door, complete with 6mm polycarbonate sections at both top and bottom, stainless steel hinges and latch. • 4'H sidewall offers more valuable growing space. • Optional Second Door Kit sold separately. • Heavy duty ground posts are included. We do recommend using a baseboard. Our recycled plastic lumber, comes with a 50 year warranty and is ideal. • Save hundreds of dollars on equipment and accessories when you purchase the Greenhouse System. We've done all the calculations for you. The size and quantity of equipment items are determined by the size of your greenhouse. For greenhouse only add "C" to the end of the model # for a complete system with Propane add "SP" and for Natural Gas add "SN" |