Fan Speed Controllers for Grow Rooms

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Showing 1 - 7 of 7 products

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Running an inline or exhaust fan at full speed at all times wastes energy, generates unnecessary noise, and can over-cool the grow room when the temperature is already within range. A variable fan speed controller lets you set minimum and maximum speed thresholds and allows the fan to ramp up or down in response to temperature, the lighting cycle, or a manual dial setting.

BioFloral carries fan speed controllers from Grozone, Garden Controls, and BioFloral's own line. The Grozone range covers everything from the DIM-1 basic dimmer through to the TV1 and TV12 day/night controllers, which set separate fan speeds for the lights-on and lights-off periods. The TV2 multimode adds temperature-responsive speed control, adjusting output automatically as the grow room heats or cools.

Why Choose Fan Speed Controllers from BioFloral?

All Grozone fan speed controllers are selected for proven compatibility with standard inline and exhaust fans and are backed by BioFloral's team with over 150 years of combined horticultural experience.
Free shipping on orders of $149 or more, with delivery to all Canadian provinces typically within 1 to 3 business days.
From a basic single-speed dimmer at $23.95 through to temperature-programmed day/night controllers, the collection covers every budget and level of grow room sophistication.
BioFloral's advisors can help confirm compatibility between a controller and your specific fan model, load rating, and ventilation setup before you order.

Duct Fans — Browse BioFloral's inline and exhaust fan range to pair with the right speed controller for your duct diameter and CFM requirements.
Climate Controllers — For automated multi-parameter control, Grozone and Trolmaster climate controllers manage fan speed alongside temperature, humidity, and CO₂ from a single unit.
Ventilation Accessories — Ducting, connectors, and flanges for integrating speed-controlled fans cleanly into your ventilation system.
Temperature Controllers — Pair a dedicated temperature controller with a fan speed controller for thermal management without a full climate automation system.

Best Fan Speed Controller for Every Grow

Best for Basic Manual Speed Control

The BioFloral Fan Speed Controller and Grozone DIM-1 provide simple rotary-dial control for single-fan setups, offering reliable, affordable options for growers who want consistent airflow without automation.

Best for Day/Night Speed Differentiation

The Grozone TV1 and TV12 set distinct fan speeds for the lights-on and lights-off periods, letting growers run at higher airflow during peak heat hours and automatically reduce to a quieter, lower-speed night setting.

Best for Temperature-Responsive Airflow

The Grozone TV2 Multimode adjusts fan speed in proportion to ambient temperature, ramping up when the room heats and backing off when conditions stabilize, reducing energy use and noise without sacrificing environmental control.

Best for Integration with a Grozone SCC1 Climate System

The Grozone OB2V Dimmer Output Box is designed specifically for growers already running a Grozone SCC1 climate controller, adding variable fan speed output to the SCC1's relay system without a standalone controller.

FAQ

What types of fans are compatible with grow room fan speed controllers?

Most standard inline fans and exhaust fans with brushed AC motors are compatible with variable speed controllers. Fans with brushless EC motors typically require a dedicated 0-10V signal rather than a standard dimmer. Check your fan's motor type and the controller's output specification before connecting.

Will running a fan at reduced speed damage the motor?

Running a fan at very low speeds for extended periods can cause motor overheating in some designs. Most Grozone controllers include a minimum speed setting to prevent this. As a general rule, avoid running a fan at less than 30 to 40 percent of its rated speed for prolonged periods unless the manufacturer's specification explicitly supports it.

What is the difference between a basic fan dimmer and a temperature-responsive fan speed controller?

A basic dimmer like the Grozone DIM-1 maintains whatever speed you set manually. A temperature-responsive controller like the TV2 reads a temperature sensor and adjusts fan speed dynamically as conditions change, keeping the grow room within a set range without manual intervention.

Can I control two fans independently with one controller?

The Grozone TV12 and TV2 are single-output controllers, suited to one fan or a pair of fans wired in parallel within the rated load. For independent control of two separate fans, you would need two controllers or a climate controller with multiple output channels. Contact BioFloral's team for advice on multi-fan setups.

Fan Speed Controllers

GROZONE OB2V DIMMER OUTPUT BOX FOR FAN FOR SCC1