This Deluxe Greenhouse contains a variety of greenhouse accessory options. The roof and roof vents are glazed with glass on the outside and twin wall polypropylene on the inside. The roof vents are automated with Bayliss vent openers. A 240 volt Cadet “Hot One” heater is mounted up high. A Sturdi-built Garden fan gently circulates air, pushing warm air down. A jalousie window set in the end wall helps with warm weather ventilation. Strong Sturdi-built benches, both slat & soil types, support many plants.