Top 10 Best co2 controller for grow room in 2026

Last Updated - 6/14/2026

🏆Best Choice

AC Infinity

AC Infinity Controller AI+ with CO2 Sensor Bundle – AI-Powered Learning, CO2 Data Tracking for Gardens & Grow Tents, Temp, Humidity, & VPD Monitoring for Dynamic Level Adjusting, Bluetooth & WiFi App

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Revolutionary AI-powered controller with CO2 sensor, actively learns and adapts to its environment to automate equipment that will precisely regulate carbon dioxide levels.
•Let AI analyze climate patterns and anticipate spikes, to program devices to dynamically output the exact percentage needed to maintain an optimal environment.
•Sensor enables smart CO2 programming dynamically adjust carbon dioxide levels, optimizing FAE (fresh air exchange) and setting minimum intake speeds for maximum efficiency based on PPM(Points Per Million).
•Control your setup from anywhere via WIFI with our app, featuring real-time AI insights, guides, alerts, charts, and the ability to chat with our AI bot about your grow.
•Mix and match up to 32 devices from the largest platform of smart fans, grow lights, humidifiers, heaters, A/Cs, and grow lights & outlet devices from other brands.

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$199.00

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Exhale

Exhale Homegrown CO2 365 - Self-Activated Bag for Grow Rooms & Tents - Great for Indoor Grow Rooms - CO2 for Grow Tents - 4 lbs

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•SELF-ACTIVATED - ExHale 365 is a self-activated version of the Original CO2 Bag.The 365 will provide a 4x4 foot or 128 cubic foot space with CO2 for 9 months of which 6 months are peak production. This product is great for small grow rooms and grow tents that are looking to produce more CO2 than what you’d normally have.
•EXPERIENCE A LARGER YIELD - Grow rooms, when used in companionship with the Original ExHale CO2 bag, can experience anywhere from 20% - 30% more growth. Requires no heat or electricity.
•MAINTENANCE FREE - Place the ExHale bag slightly above the height of the plants in your grow space. CO2 being heavier than O2 will precipitate downward towards your plants. ExHale-Homegrown CO2 is a revolution in indoor CO2 production systems. Maintenance Free! Just CO2! Proudly made in the USA.
•PERFECT FOR MOST PLANTS - ExHale can be used for both vegetative plant growth as well as for fruit and flower production. Put the ExHale CO2 Bag in your grow tent and let it do its thing.
•DIRECTIONS - Remove hanger from bag. allow the material in the upper spawn pod to fall to the sterilized substrate below by gently moving the spawn pod down to the lower part of the bag. Re-attach the hanger by placing it above the filter patch. The Exhale bag can now be placed in your garden.

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$37.06

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VIVOSUN

VIVOSUN GrowHub Controller E42A for Grow Tent, Smart Environmental WiFi-Controller with Temperature, Humidity, VPD, Timer, Cycle, Schedule Controls, Cooling Ventilation Lighting Programming

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Unify Your Equipment: You can operate them individually or unify all your smart devices through the GrowHub E42A platform to simplify the complexities of gardening to a scientifically manageable level and thus better stabilize your growth environment
•Environmental Monitoring: With a built-in temp and humidity gauge and one probe, the GrowHub Controller E42A monitors changes in both the internal and external environment, and you can view this data and program through the App
•Fully Automated: Program your equipment to automatically take you through each stage of growth – program light intensity, light spectrum, on/off periods, fan speed, and airflow volume, make changes to better suit your plants at any time
•Customizable Settings: Fully customizable programming allows to customize your style with easy-to-use settings, a clear LED display, capacitive buttons – and the GrowHub E42A Controller can be mounted on your tent fabric without an ugly mounting bracket
•App Controllable: The GrowHub Controller is WiFi-enabled so you can control your equipment from anywhere, anytime via the app; The App expands the controller’s capabilities through Grow Recipes and other extremely powerful settings
•Perfect Addition: Type-C to MOLEX and AUX converters increase the range of compatible fans; the RJ11 network interface supports VS series grow lights and some other brands of lights; Use the 12V power adaptor to drive the controller when no device is connected

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$49.99

$89.99

-44%

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Inkbird

Inkbird ICC-510 CO2 Controller CO2 Meter Dual Plug Carbon Dioxide Controller Fit with CO2 Regulator and Inline Exhaust Fan for Grow Tent, Grow Room, Greenhouse, Grower

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Dual Output Design: Connects to CO₂ equipment and ventilation system simultaneously, maintaining ideal CO2 levels for optimal plant growth.
•Intelligent Light Sensor: Automatically adjusts CO₂ output based on light intensity, promoting energy efficiency and healthy plant development.
•Universal Power Supply: 100-240V AC input, suitable for use in various voltage environments worldwide.
•Precise CO₂ Control: Helps regulate CO2 concentration, enhancing photosynthesis and keeping plants fresh and thriving.
•Versatile Application: Ideal for greenhouse cultivation, facilitating plant growth and productivity.

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$130.99

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AC Infinity

AC Infinity CO2 Regulator, Carbon Dioxide Monitor with Solenoid Valve and Gas Flow Meter, CO2 Gauge Gas System for Grow Tents, Grow Rooms, and Greenhouses

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•A gas release system designed to help create the ideal grow environment by regulating CO2 output.
•Carbon dioxide meter with pressure gauge accurately measures gas flow and remaining CO2 tank levels.
•Forged with heavy-duty brass and a solenoid valve pipe to ensure proper flow and no gas leakage.
•Secures installs on many tanks and hose tubing to fit as a CO2 generator for grow tent applications.
•Brass Construction | Pressure Gauge: 0-4000 PSI | Inlet: CGA-320 | Flow Meter: 0.5-15 SCF/hour

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$44.99

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EDYCARX

EDYCARX 25ft 1/4" CO2 Drilled Tubing, Black PU, Grow Room CO2 Injection System, Kit Includes Tubing, Fittings & Accessories, Compatible with CO2 Regulator

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Material: Long-lasting heavy duty high quality PU CO2 tubing
•Specifications: 25 feet, 3/16 inch inner diameter, 1/4 in outer diameter CO2 hose with holes
•Application: Showers your plants with an optimal dose of CO2, perfect for enhancing the amount of available carbon dioxide and accelerating plant growth rates
•Components: CO2 tubing kit includes CO2 drilled tubing, T fitting, Straight fitting, stopper fitting, 6pcs eye screws and 6pcs nylon ties
•Compatible: Use with CO2 regulator and tank to evenly distribute CO2 to your grow area and plants

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$19.99

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DANOPLUS

CO2 Controller Dual Outlets Carbon Dioxide Controller for Grow Room, Two Smart Plugs Automatically Control Regulators and Fans, NDIR Sensor and Display CO2 Chart, Temp, RH

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•✅【Dual Outlets Control】DANOPLUS CO2 Controller is equipped with TWO smart outlets, Dual outlets are independently programmed and control, it will turn on CO2 Equipment or Exhaust Fans automatically according to your preset values, optimize CO2 environment for grow room.
•✅【NO Complicated Setup!!!】Digital CO2 Controller is designed with 2 knobs: BORDER HI and BORDER LOW, you can simply rotate the knobs to set the high/low value to control the CO2 regulators and Exhaust Fans. No complex calculations for Zone and Center value compare to others!
•✅【Dual-beam NDIR CO2 Sensor】DANOPLUS CO2 controller is equipped with a dual-beam low-drift NDIR CO2 sensor for accurate CO2 readings (±50ppm), the sensor is able to AUTO detect day and night in Plant Mode and display CO2/Temp/RH readings also
•✅【3 in 1 CO2 Controller】The CO2 Monitor and Controller has a large LCD Screen displaying CO2 chart, CO2 Reading, Temperature, Humidity, supports independently programmed and automatically control the CO2 level in your grow tent, Grow room, Home, etc.
•✅【Multi-Functional CO2 Controller】The carbon dioxide controller is equipped with Plant Mode and Human Mode (Automatically Control), Buzzer Alarm, Altitude Adjustable, Calibration Function, MAX/MIN reading, CO2 Chart setting, and comes with sensor of 15 FEET(450 cm) long cable

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$104.49

$109.99

-5%

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DANOPLUS

CO2 Controller Carbon Dioxide Controller CO2 Meter Monitor Day and Night Relay Function, NDIR CO2 Sensor for Green House, Grow Rooms, Factory, Home, Office

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•【CO2 Controller】This CO2 Controller is equipped with wide LCD screen, 0-5000 ppm measuing range, it's able to record trend chart of CO2 levels per minute/hour/day/week for analysis
•【Plant Mode&Human Mode】The Carbon Dioxide Controller is designed with Plant Mode and Human Mode, can mannually control the CO2 level for CO2 generator in Grow room, or control the ventilation system indoor
•【Auible Alarm】This CO2 Controller will alarm via buzzer when the CO2 level exceed the setting threshold, and you may manually adjust the CO2 ppm threshold accoringly
•【AUTO Day&Night Detection】CO2 Controllers has auto day and night detection, it will automatically turn off CO2 generator/regulator by turning off the output power during the night
•【Multi-Functional】Wall mounted CO2 Monitor & Controller comes with piggyback socket, Altitude Adjustable from 50 to 500 meters, 14.8 feet (4.5 m) Cable for CO2 sensor

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$115.99

$122.99

-6%

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AC Infinity

AC Infinity CO2 Controller, Smart Outlet Carbon Dioxide Monitor, Two-Plug System Best Fit with CO2 Regulators and Inline Exhaust Fans, Adjusts CO2 for Grow Tents, Grow Rooms, Greenhouses

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•A smart outlet controller to optimize your environment for growing by managing CO2 output and removal.
•Supports and independently programs CO2 regulators and exhaust fans for use in indoor grow settings.
•Custom CO2 and fan programming dynamically alternate to activate in response to carbon dioxide levels.
•Other programming includes precision cycles, night scheduling, and environmental data tracking.
•Advanced sensor precisely measures your grow space climate to ensure accurate readings.

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$129.00

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Autopilot

Autopilot CO2 Monitor & Controller w/15' Remote Sensor

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Fully customizable ppm deadband and CO2 set point allow flexibility in programming
•Trend chart records CO2 levels per minute, hour, day and week for accurate analysis of CO2 distribution
•Adjustable trend chart zoom levels let you trace your ppm levels
•Remote CO2 sensor probe w/Photocell & 15' data cable lets you take readings from proper grow room locations
•2-channel low drift ndir sensor precisely reads CO2 ppm levels

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$242.22

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