Exhaust Fan 12" for Riga Greenhouses

The Riga 12" Exhaust Fan is a compact, high-efficiency ventilation solution designed for small to mid-size hobby greenhouses. Recommended for Riga 2, 3, and 4 models, it actively exhausts hot air and excess humidity to keep your growing environment stable and healthy year-round.

Why Proper Greenhouse Ventilation Matters

Without active airflow, greenhouse temperatures can climb 20–30°F above outdoor levels on sunny days, triggering heat stress, fungal disease, and crop loss. Mounting an exhaust fan high on the back wall creates a negative-pressure draw that pulls fresh air through intake vents at the opposite end — the most effective ventilation strategy for structures under 100 sq ft.

Key Features

• 12" blade diameter — right-sized CFM airflow for Riga 2, 3, and 4 footprints
• Requires a 12.25" × 12.25" wall opening — fits standard Riga and Victorian J-Vic panel cutouts
• Pre-wired with a 9-foot power cord — plug-and-play installation, no electrician required
• High-wall placement — installs near the ridge for maximum heat and humidity extraction
• Pairs with a thermostat controller — add automatic temperature management for hands-free climate control

Compatible Greenhouse Models

This fan is sized and rated for:

• Riga 2, Riga 3, and Riga 4 greenhouses

For larger Riga and Victorian models, see our 16" Exhaust Fan and 20" Exhaust Fan options.

Installation Overview

Mount the fan high on the back (leeward) wall of your greenhouse. Pair with passive intake vents or louvers on the front wall near ground level. Connect to a thermostat controller (sold separately) to automate on/off cycling based on your target temperature threshold.

Frequently Asked Questions

What size opening does the 12" exhaust fan require?
The fan requires a 12.25" × 12.25" square opening in your greenhouse wall panel.

Does this fan need to be hardwired?
No. It comes pre-wired with a 9-foot power cord and plugs into a standard outlet.

Can I use this fan with a thermostat?
Yes. It is compatible with standard greenhouse thermostat controllers for automatic temperature-based operation.

Which Riga greenhouse models does this fit?
This fan is recommended for Riga 2, Riga 3, and Riga 4. For larger Riga models, see the 16" or 20" fan options.

What is the difference between the 12" and 16" exhaust fans?
The 12" fan is sized for smaller greenhouse footprints (Riga 2–4 and Victorian J-Vic/VI), while the 16" fan is designed for the larger Riga 5 and Victorian VI 34–46 models. Choose based on your greenhouse model for optimal airflow.