Developed and designed by Growers Greenhouse Supplies, Inc., the Low Profile Glass greenhouse is based on the world famous Venlo concept of twin peaks and a floating gutter. Designed for a northern climate, prominent features include tempered glass roof, efficient roof vents and high light transmission. This proven design has satisfied the needs of a variety of growers with the quality, service and reliability that they have come to expect from GGS. Ventilation options include continuous alternative roof windows for 33% more vent openings than traditional systems.