20" Intake Shutter Vent for Riga Greenhouses

The 20" Intake Shutter Vent is a motorized intake vent built for larger greenhouse structures. Compatible with Riga 5 models, it automatically opens to draw in fresh air and closes to block insects and debris when the exhaust fan is off — delivering hands-free climate control for bigger growing spaces.

Key Features

• Precise fit: Requires a 20.25" × 20.25" rough opening — sized for Riga 5 and Victorian VI wall panels
• Optimal placement: Install high in the lowest front-wall panel, directly opposite the exhaust fan, for maximum cross-ventilation
• Plug-and-play installation: Pre-wired with a 9-foot power cord — no hardwiring or electrician required
• Motorized shutters: Automatically open for airflow and close when idle to block pests and debris
• Built for larger structures: Sized to move the higher air volume needed in Riga 5 and Victorian VI greenhouses

Complete Your Ventilation System

For fully automatic climate control, pair this intake vent with a compatible 16" or 20" exhaust fan and a thermostat controller. Together they regulate temperature and humidity automatically — no manual adjustments needed, even on the hottest days.

Compatibility

Designed for Riga 5 and Janssens Victorian VI 34, 38, 42, and 46 greenhouse models. Requires a 20.25" × 20.25" wall opening.

Specifications

• Vent size: 20" (requires 20.25" × 20.25" opening)
• Power cord: 9 feet, pre-wired (plug-in)
• Operation: Motorized, automatic open/close
• Compatible models: Riga 5, Janssens Victorian VI 34–46
• SKU: VRSG20A-PSC

Frequently Asked Questions

What size opening does this vent require?

The 20" intake shutter vent requires a 20.25" × 20.25" opening in your greenhouse wall panel.

Does it need to be hardwired by an electrician?

No. It comes pre-wired with a 9-foot power cord and plugs into a standard outlet — no hardwiring required.

Where should I install the intake vent?

For best results, install it high in the lowest panel of the front wall, on the opposite side from your exhaust fan. This creates effective cross-ventilation and maximizes airflow through the greenhouse.

Which greenhouse models is this compatible with?

This vent is compatible with Riga 5 and Janssens Victorian VI 34, 38, 42, and 46 models.

What is the difference between the 16" and 20" intake vents?

The 20" vent is sized for larger greenhouse structures — specifically Riga 5 and Victorian VI models — which require a bigger opening and higher airflow capacity than the Riga 2, 3, and 4 models served by the 16" vent.

Can I use this without an exhaust fan?

The vent is motorized and designed to work in tandem with an exhaust fan system. Pairing it with an exhaust fan and thermostat delivers the best automatic ventilation performance.