CO2 Controllers

Plants in a sealed or semi-sealed grow room consume CO2 faster than natural ventilation replaces it, and levels can drop well below the ambient 400 PPM that already limits photosynthesis. A dedicated CO₂ controller monitors carbon dioxide concentration through an infrared sensor and activates a CO₂ generator or solenoid valve to maintain the target PPM, then triggers exhaust ventilation when levels reach the upper setpoint.

BioFloral carries CO₂ controllers for grow rooms from Grozone and Garden Controls, covering the full range from the ultra-simple Garden Controls unit at 500 to 1500 PPM for basic supplementation through to the Grozone CO2D dual-zone controller measuring from 0 to 5000 PPM for advanced or commercial applications. The Grozone SCC1 and HTC also manage CO₂ as part of a complete climate control package alongside temperature and humidity.

Why Choose CO2 Controllers from BioFloral?

• All Grozone CO₂ controllers are selected by BioFloral's horticultural experts for accuracy, sensor longevity, and compatibility with both CO₂ generators and pressurised tank setups used by Canadian growers.

• Free shipping on orders of $149 or more, with delivery across Canada within 1 to 3 business days.

• The collection covers single-output, dual-output, and dual-zone configurations, as well as combo controllers that integrate CO₂ management with temperature and humidity control in a single unit.

• BioFloral's technical advisors can help you determine the right PPM range, number of outputs, and whether a standalone CO₂ controller or an integrated climate controller better suits your grow.

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• Climate Controllers — Grozone HTC and SCC1 manage CO₂ alongside temperature and humidity, eliminating the need for a separate CO₂ controller in many setups.

• Accessories for Climate Control and CO2 — Relay output boxes, power cords, and accessories for expanding and completing your Grozone CO₂ control system.

• Fans — CO2 enrichment requires sealed or near-sealed conditions; fans for internal circulation distribute CO₂ evenly without exhausting it from the room.

• Odor Control — In sealed CO₂ rooms, odor management shifts from exhaust-based filtration to carbon filters and ozone generators that can operate without continuous air exchange.

Best CO2 Controller for Every Grow

Best for First-Time CO2 Supplementation

The Garden Controls CO2 Controller (500 to 1500 PPM) provides simple, reliable supplementation for small to medium grow rooms at an accessible price, without the PPM range or dual-output features that most hobby growers will never need.

Best for Precise CO2 Management in a Single Zone

The Grozone USCO2 monitors from 0 to 1600 PPM and offers a clean, straightforward single-output controller for growers who want accurate CO2 maintenance without the complexity or cost of a high-PPM industrial unit.

Best for Advanced or High-PPM Single-Zone Grows

The Grozone SCO2 and CO2R both measure from 0 to 5000 PPM, with the CO2R providing two independent outputs useful for growers running both a CO2 generator and a solenoid valve, or managing two separate injection points in a larger room.

Best for Commercial or Multi-Zone CO2 Control

The Grozone CO2D Dual Zone controller manages two separate growing areas independently from a single unit, with 0 to 5000 PPM range per zone, suited to facilities running vegetative and flowering rooms with different CO2 targets simultaneously.