ExHale XL CO2 Bag

XL Mycelium CO2 Bag From ExHale — 6ft x 6ft Coverage, up to 6 months of enrichment

The ExHale XL CO2 Bag delivers continuous, passive CO2 enrichment to an indoor garden for up to 6 months of enrichment without electricity, heat, or any additional equipment. Powered by a living mycelium culture contained within a vented bag, it naturally produces and releases CO2 around the clock through a microporous breather patch, matching the day and night rhythm of the plants.

Simply hang it above the canopy in a 6ft x 6ft grow space (up to 288 cu ft) and let it work. Organic, maintenance-free, and made in the USA, the ExHale XL is a simple way to boost CO2 levels and support stronger growth and improved photosynthesis, sized to support 6 to 8 plants through all growth stages from seedling to harvest.

Key Features & Benefits

• Passive CO2 generation: Mycelium culture continuously produces and releases CO2 with no electricity, heat source, timers, or additional equipment required.
• 24/7 CO2 release: Provides around-the-clock CO2 enrichment, automatically reducing output during nighttime hours to match the plants' natural cycle.
• Covers 6ft x 6ft / 288 cu ft: Sized to support 6 to 8 plants through all growth stages from seedling to harvest.
• Up to 6 months of enrichment of enrichment: A long-lasting mycelium culture provides extended CO2 supplementation without refills or replacement for most of the grow cycle.
• Built-in hanger, zero setup: An integrated hanging mechanism allows easy canopy-level placement, and no assembly or installation is needed beyond hanging the bag.

Who Should Use This

Indoor cultivators who want simple, low-maintenance CO2 supplementation without CO2 tanks, burners, or electronic controllers are the direct fit for the ExHale XL, particularly home grow rooms and small commercial spaces that prefer passive organic CO2 enrichment over mechanical systems.

About ExHale

ExHale CO2 Bags use a living mycelium culture, sealed inside a vented bag with a microporous breather patch, to generate passive organic CO2 enrichment with no electricity, heat, or combustion byproducts. The product line is made in the USA.

Frequently Asked Questions

How does a mycelium bag produce CO2?

The mycelium culture inside the bag naturally consumes the organic substrate and releases CO2 as a byproduct of its metabolic process, the same way fungi produce CO2 in nature. The microporous breather patch allows CO2 to escape steadily while keeping the culture contained inside the bag.

How do I activate the ExHale bag?

The bag is activated when it is removed from its sealed packaging and the mycelium culture is exposed to fresh air. No water, setup, or special conditions are needed; simply open the outer packaging and hang the bag above the canopy to begin CO2 release.

Can ExHale bags replace CO2 tanks or burners?

ExHale bags provide supplemental CO2 enrichment that can raise levels by several hundred ppm above ambient in a properly enclosed space. For maximum CO2 enrichment at high concentrations, dedicated CO2 systems offer more precise control, so ExHale bags are best suited for supplemental enrichment in smaller enclosed gardens.

Does the CO2 output decrease over time on the XL?

Yes. The mycelium culture produces CO2 most actively during its peak growth phase and gradually reduces output as the substrate is consumed. This natural taper is a feature of the organic system, and the XL provides up to 6 months of enrichment of useful CO2 enrichment across its lifespan.