10 Best Co2 Generator For Greenhouse of 2025

Tested and Reviewed: Top 10 Co2 Generator For Greenhouse deals with expert ratings from 8.1 to a perfect 10

December 2025 Edition

Editor's Choice

9.7

Autopilot

Autopilot APGN0400 CO2, 4 Burner, NG Generator, White

Editor's bottom line:

“This co2 generator for greenhouse is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

All models are equipped with:
Precision manufactured brass burners
Solid-state electronic ignition module pilot light necessary
Tip over switch shuts off gas source if the unit falls or tips over
Shut down warning with LED error indicator lights

Show Price

Picked by 259 people today

9.5

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

Free Shipping

Main Highlights

Dual Output Design: Connects to CO equipment and ventilation system simultaneously, maintaining ideal CO2 levels for optimal plant growth.
Intelligent Light Sensor: Automatically adjusts CO 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 CO Control: Helps regulate CO2 concentration, enhancing photosynthesis and keeping plants fresh and thriving.
Versatile Application: Ideal for greenhouse cultivation, facilitating plant growth and productivity.

Show Price

9.5

briidea

Briidea CO2 Controller and Monitor, Day and Night Programmable CO2 Controller with Remote Sensor for Greenhouses

Free Shipping

Main Highlights

HIGH-PRECISION NDIR CO2 SENSOR: Equipped with a dual-channel, low-drift NDIR sensor for accurate CO2 ppm readings. The 6.56 ft (2m) extended sensor cable allows flexible placement in optimal grow room locations for reliable measurements.
SMART PROGRAMMABLE FUNCTIONS: Features 6 preset CO2 levels for different growth stages and time periods. In auto mode, you can schedule CO2 shut-off during dark cycles or customize CO2 levels to meet the needs of specific plant types.
PLUG-AND-PLAY OPERATION: Simply plug your CO2 generator or regulator into the controllers piggyback outlet. It automatically activates the CO2 device when levels drop and shuts it off when the desired level is reachedsaving time and effort.
SAFE & DURABLE DESIGN: Supports up to 1800W for high-power CO2 devices. Built with UL-listed components for enhanced safety, performance, and long-term reliability.
VERSATILE APPLICATIONS: Ideal for use in greenhouses, grow rooms, hydroponics setups, indoor farms, and any environment where CO2 enrichment boosts plant growth.

Show Price

9.2

CO2BAG

CO2BAG® XL – Natural CO₂ Generator for Indoor Plants & Greenhouses | Boosts Growth, Yield, Taste & Color | Compact, Safe & Maintenance-Free -2-Pack-

Free Shipping

Main Highlights

Accelerated Plant Growth & Higher Yields: Consistent CO supply helps plants photosynthesize more efficiently, leading to faster growth, quicker fruit ripening, and bigger, healthier harvests.
Effortless & Maintenance-Free: No tanks, regulators, or electricity required. Just hang the bag in your grow space and enjoy natural CO enrichment for weeks.
Safe for Plants & People: Releases CO steadily and safely, creating the ideal growing environment for indoor grow rooms and greenhouses without risk.
Compact Yet Powerful: Effective for areas up to 3m² (for size XL), making it the perfect solution for hobby growers, small tents, or compact greenhouses. Its a budget-friendly alternative to expensive CO systems.
Satisfaction Guaranteed: We stand behind the effectiveness of every CO2BAG. If youre not fully satisfied with the results, well make it right grow with confidence.

Show Price

9.0

CO2BAG

CO2BAG® M for Effective Growth | Improves Taste, Color & Yield | Compact & Maintenance-Free for Indoor Growing and Greenhouses. -2-Pack-

Free Shipping

Main Highlights

CO2bag is very small and easily affordable bag producing carbon dioxide for your plants.
Increases the growth rate of your plants, accelerates the ripening of the fruit
CO2bag is safe to use, easy to setup without any maintenance required.
100% satisfaction quarantee of all our products!
Recommended room size for one CO2BAG M is up to 22 ft2
We are happy to answer your questions. Support: support@co2add.com
CO2 is heavier than air, so you must put the bag HIGHER than plants.

Show Price

Best Value

8.8

Save 10%

Exhale

ExHale Homegrown CO2 Original - CO2 Bag for Indoor Grow Rooms & Tents - Great for Indoor Grow Rooms - CO2 for Grow Tents - 4 lbs. (1 Pack)

10% Off

Main Highlights

GREAT FOR SMALL GROW ROOMS - The Original ExHale CO2 Bag 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 smaller grow rooms and grow tents that are looking to produce more CO2 and catalyze growth.
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. Fold the top of the bag over and re-attach the separation seam hanger by placing it above the filter patch. The Exhale bag can now be placed in your garden.

Show Price

8.6

The Green Pad

The Green Pad GP6050 CO2 Generator Contains 5 Pads w/2 Hangers

Free Shipping

Main Highlights

The GREEN PAD CO2 generators has made adding Carbon Dioxide to indoor gardens easier than ever
THE GREEN PAD may be one of the most inexpensive and innovative ways to get the good gas to your plants. THE GREEN PAD's were designed to produce enough CO to be of significant benefit to the indoor home garden without the up front expense of equipment, but with similar results.
The Green Pad is the real deal. Digital meters show high levels of CO FOR ALL YOUR CURRENT TANK CUSTOMERS THAT USE TANKS. Do not get in a situation where you run out of CO. THE GREEN PAD is your backup for growers using CO tanks that run empty. Keep an extra pack on hand for emergencies or when you cannot get a tank refill.
Without expirations issues, THE GREEN PAD's are ready when your garden needs them. EASY TO USE: To raise your PPM's follow the directions and hang 1-2 GREEN PADS above your canopy per every 200-400 cubic feet of garden space. Activated by humidity (35%) and /or by lightly misting with water or, adding a moist sponge to a folded GREEN PAD.
Adding more of THE GREEN PADS will increase your PPM's in your specific area

Show Price

8.3

The Green Pad

The Green Pad Junior GP6010 Carbon Dioxide CO2 Generator Greenhouse Garden Pad with Humidity Activation for Clone Propagating, 10 Pads

Main Highlights

GREAT FOR SEEDLINGS AND CLONES: Commercial carbon dioxide supplement made specifically for seedlings and clones
GREAT FOR SEEDLINGS AND CLONES: Commercial carbon dioxide supplement made specifically for seedlings and clones
HUMIDITY ACTIVATED: Absorbs the humidity in your propagation dome powering natural chemical reaction and releasing a measured amount of carbon dioxide
PRODUCES HEALTHY PLANTS: Provides higher strike rates, less leaf yellowing, and faster rooting by 2 to 3 days or more
EASY TO USE: Simply place in your humidity dome and replace every other day until fully rooted or when you remove the dome

Show Price

8.1

Save 7%

Clscea

Clscea DIY CO2 Generator System Kit with Safety Valve 1 Second Quick Reaction for Aquarium Plants Integrated Design

7% OffFree Shipping

Main Highlights

Our CO2 Generator Kit includes most of the accessories. You only need to prepare yourself: 2 additional carbonated beverage bottles (preferably for 2L), e.g. Coke or Sprite; reaction materials: baking soda and citric acid; check valve and CO2 diffuser.
Highlight: A quick reaction test tube simplifies the procedure and achieves a fast reaction. 1 SECOND QUICK REACTION, works immediately, almost no waiting.
Green body using high-quality PC material, injection moulding. Extremely durable, corrosion-resistant, and not easily clogged. The transparent design clearly shows the flow of citric acid. Multifunctional: Two holes in the middle are designed to hang trimming tools for water plants.
Equipped with a safety valve that automatically relieves pressure when exceeds 4 kg/cm², and it also supports manual adjustment. The acid absorbing ball makes it more convenient to control acid consumption. Brass micro-adjustment valve, more accurate adjustment, more durable. Detachable design, easy to clean, no longer worried about clogging.
*Tips: The needle valve is only used to adjust the output volume, It only need to be adjusted once. Daily switching can be controlled by the white on/off valve. The reason for this is to ensures the gas output is stable.
*Tips: Although the length of the CO2 tubing in the package is 1.6 meter, the length of the tubing should be shortened as much as possible when used. The longer the tubing is, the more difficult it is to control the gas volume.

Show Price

8.1

CO2BAG

CO2BAG® M – Natural CO₂ Generator for Indoor Plants & Greenhouses | Boosts Growth, Yield, Taste & Color | Compact, Safe & Maintenance-Free

Free Shipping

Main Highlights

Accelerated Plant Growth & Higher Yields: Consistent CO supply helps plants photosynthesize more efficiently, leading to faster growth, quicker fruit ripening, and bigger, healthier harvests.
Effortless & Maintenance-Free: No tanks, regulators, or electricity required. Just hang the bag in your grow space and enjoy natural CO enrichment for weeks.
Safe for Plants & People: Releases CO steadily and safely, creating the ideal growing environment for indoor grow rooms and greenhouses without risk.
Compact Yet Powerful: Effective for areas up to 2m² (for size M), making it the perfect solution for hobby growers, small tents, or compact greenhouses. Its a budget-friendly alternative to expensive CO systems.
Satisfaction Guaranteed: We stand behind the effectiveness of every CO2BAG. If youre not fully satisfied with the results, well make it right grow with confidence.

Show Price

Our Best Overall Choice

Best Choice

9.7

Autopilot

Autopilot APGN0400 CO2, 4 Burner, NG Generator, White

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

All models are equipped with:
Precision manufactured brass burners
Solid-state electronic ignition module pilot light necessary
Tip over switch shuts off gas source if the unit falls or tips over
Shut down warning with LED error indicator lights

Show Price

Related Deals You Might Like for Co2 Generator For Greenhouse

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

Show PriceView

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

Show PriceView

ZRDR 4L Co2 Generator System with Dual Gauge Display Pressure Gauge,DIY Co2 Generator System Kit, Automatic Pressure Relief Valve Bubble Counter for Plants Aquarium, Stable Output

8% Off

Show PriceView

CO2 Controller Carbon Dioxide Monitor CO2 Smart Sensor Dual Outlets Fit with CO2 Regulators and Fans, Two Plug C02 Control for Grow Room, Grow Tent, Greenhouse

Show PriceView

Clscea Aquarium CO2 Generator with Solenoid Valve for Aquarium Plants 1L G600mini

13% Off

Show PriceView

VIVOSUN Hydroponics CO2 Regulator Emitter System with Solenoid Valve Flowmeter for Grow Room Grow Tent Garden

Show PriceView

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

Show PriceView

TNB Naturals The Enhancer, CO₂ Dispersal Canister-240g

Show PriceView

Pawfly Aquarium CO2 Generator System Kit, CO2 for Aquarium Plants, CO2 Generator for Plants, DIY CO2 Aquarium Kit with CO2 Diffuser Regulator Pressure Gauge and Safety Valve

Show PriceView

Clscea G200 Aquarium DIY CO2 Generator System Kit

Show PriceView

Deals are Live

Special Amazon deal ends in: