In addition to their standard gutter-connected greenhouses for larger indoor growers, Zimmerman’s has an originally designed gutter connected greenhouse system that utilizes a raised area above the gutter, which allows ventilation curtains to be installed. In the photos below you can see how this would help to ease the problem of inadequate ventilation in large expanses of gutter-connected greenhouses. This system is currently in use in MO and works well in states without heavy snowfall, but different designs are being considered that may have potential for northern states. Extra metal support pieces can be ordered for applications where a rigid greenhouse covering is used instead of standard greenhouse plastic.