Schaefer Manual Variable Speed Controller - 115/230V - 12.5 Amp - For Schaefer Fans

Dial In Fan Airflow by Hand - 7 3/4 x 4 3/4 x 3 3/4 in

Fans that run at one speed waste energy and add noise when you need less airflow. This manual controller lets you set the speed of a compatible Schaefer fan with a simple adjustment, so you can raise ventilation when a space needs it and lower it when it does not. It is rated for 115/230V, 12.5 nameplate amps and single-phase supply, and carries CSA certification.

This is a single unit, sized for one fan circuit. It suits the grower who wants direct, hands-on control of airflow in a grow room, tent, greenhouse or production space without adding a full automated environment system.

Key Features & Benefits

• Manual speed adjustment — set airflow where you want it for ventilation or quieter operation.
• Dual voltage rating, 115/230V — matches common supply options.
• 12.5 nameplate amps — states the electrical rating you need to check against your fan load.
• CSA certified — listed to a recognized electrical safety standard.
• Compact housing — about 7 3/4 x 4 3/4 x 3 3/4 in and 4 lbs, easy to mount near the fan.

Who Should Use Schaefer Manual Variable Speed Controller

Growers running Schaefer fans for vegetative growth, flowering rooms, greenhouses or other indoor spaces who want to tune airflow by hand. It works for home gardeners and commercial operations alike.

About Schaefer Manual Variable Speed Controller

Schaefer lists this model as a fan speed control, model MSC-400. It is a single-phase unit with 60/50 Hz frequency, 115/230V voltage and 12.5 nameplate amps. It measures 7 3/4 x 4 3/4 x 3 3/4 in, weighs 4 lbs and is sold each.

Frequently Asked Questions

Q: What does this controller work with?
A: It is intended for Schaefer fans. Check your fan's electrical rating before installing, as compatibility with other brands is not stated.

Q: Is it automatic?
A: No. It is a manual controller, so you set the speed yourself. It does not adjust on its own to temperature or humidity.

Q: What voltage and frequency does it support?
A: It is listed for 115/230V and 60/50 Hz on a single-phase supply. Match these to your fan and your power source.

Q: What does nameplate amps mean?
A: Nameplate amps is the current rating printed on the device label. Your connected fan load should stay within that rating.

Q: Is it safety certified?
A: It carries CSA certification. Have a qualified electrician handle installation and follow local electrical codes.