ExHale, The Original CO2 Bag

Passive Mycelial CO2 Bag for Small to Mid-Size Grow Rooms

Supplementing CO2 usually means tanks, regulators, and controllers that take up space and require setup most home and small commercial growers would rather avoid. The ExHale Original CO2 Bag delivers a continuous supply of carbon dioxide using a live mycelial mass sealed inside a vented bag, releasing CO2 through a microporous breather patch for a steady, maintenance-free source that needs no electricity, heat, or bottle refills.

On average, the Original raises CO2 levels approximately 500 ppm above ambient air, supporting photosynthesis through both the vegetative and flowering stages. It's sized for a 4x4 ft or 128 cubic ft grow space, and ships with a freshness seal that doubles as a hanging hook for positioning above the canopy.

Key Features & Benefits

• Continuous CO2 production — a patented strain of mycelium releases CO2 around the clock without any input from the grower.
• No electricity required — operates with no power, heat, or CO2 generation equipment of any kind.
• Maintenance free once placed — no refills, timers, or monitoring needed after the bag is positioned in the grow space.
• Organic-compatible — suitable for use in organic production environments.
• Made in the USA — manufactured domestically by ExHale, the company credited with bringing the mycelial CO2 bag format to market.
• 500 ppm CO2 boost — raises CO2 approximately 500 ppm above ambient air levels on average once active.
• Sized for 4x4 ft spaces — built for grow tents or rooms up to 4x4 feet or 128 cubic feet.

Who Should Use the ExHale Original

This fits small to medium-scale indoor growers who want a passive, low-maintenance way to supplement CO2 without a tank, generator, or controller. It's a set-and-forget option for a single 4x4 ft tent or a comparably sized room.

Positioning the Original in Your Grow Space

Hang the bag slightly above the plant canopy so CO2 settles downward onto the plants, since CO2 is heavier than air. If the room has active ventilation, position the bag near the fresh air intake so circulating air carries CO2 through the canopy. Setup is limited to removing the freshness seal and hanging the bag in place.

Frequently Asked Questions

How long does the ExHale Original last?

The Original is built to produce CO2 continuously for up to 6 months once hung in the grow space. No recharging or refilling is required during that window.

How much does it raise CO2 levels?

On average, the Original raises CO2 approximately 500 ppm above ambient air levels. Actual increase depends on room size, ventilation, and how tightly the space is sealed.

What size grow space does it cover?

It's designed for a 4x4 ft tent or a room of roughly 128 cubic feet. Larger spaces should use ExHale XL or multiple bags positioned throughout the room.

When should I hang the Original above my plants?

Hang it as soon as plants enter active vegetative growth, since CO2 supplementation benefits both veg and flower stages. Position the bag slightly above the canopy so CO2 falls naturally onto the plants below.

Does it need electricity or refilling?

No, the Original requires no electricity, heat, or refills. It operates passively through the ongoing activity of the mycelial mass sealed inside.