ExHale XL CO2 Bag

Extended-Coverage Mycelial CO2 Bag for Larger Grow Rooms

A single small-format CO2 bag can't distribute enough CO2 across a large tent or dedicated grow room to make a meaningful difference at the canopy. The ExHale XL CO2 Bag runs on the same live mycelial mass and microporous breather patch technology as the ExHale Original, releasing CO2 continuously for up to 6 months without electricity, heat, or any refillable components.

The XL is scaled for spaces up to 6x6 ft or 288 cubic ft, covering larger tents, rooms, and production environments that the Original size can't reach. Like the rest of the ExHale line, it ships with a freshness seal that doubles as a hanging hook and needs no attention after installation.

Key Features & Benefits

• Continuous CO2 output — the same patented mycelium strain used in the Original keeps releasing CO2 around the clock, scaled to a bigger bag.
• Runs without electricity — no power cord, heater, or CO2 generation equipment is needed at any point.
• Nothing to monitor after setup — once hung, the bag needs no refills, timers, or day-to-day attention.
• Organic-compatible — suitable for use in certified organic production environments.
• Domestically manufactured — ExHale, the company credited with bringing the mycelial CO2 bag format to market, builds the XL in the USA.
• Larger coverage area — scaled for grow spaces up to 6x6 feet or 288 cubic feet.
• Same core technology as the Original — built on ExHale's mycelial mass and breather patch design, just sized up.

Who Should Use the ExHale XL

The XL suits growers with medium to large grow spaces who still want a passive, low-maintenance CO2 supplement rather than a tank-and-regulator setup. It's a better fit than the Original for dedicated grow rooms or larger tents where a single small-format bag wouldn't reach the full canopy.

Choosing Between the XL and the Original

The Original is rated for a 4x4 ft or 128 cubic ft space, while the XL is rated for 6x6 ft or 288 cubic ft. If a grow space falls between those two ranges, sizing up to the XL keeps CO2 distribution more consistent across the room. For spaces larger than 288 cubic feet, growers typically position multiple XL bags at different points in the room.

Frequently Asked Questions

How does the XL differ from the Original?

The XL is built for larger grow spaces, covering up to 6x6 ft or 288 cubic ft compared to the Original's 4x4 ft or 128 cubic ft. Both use the same mycelial mass and breather patch technology, so the difference is coverage area, not mechanism.

How long does the XL last?

The XL is built to produce CO2 continuously for up to 6 months once installed. Like the Original, it needs no recharging or refilling during that window.

Does the XL need electricity or refilling?

No, it operates passively through the mycelial mass sealed inside and requires no electricity, heat, or refills. Setup is limited to removing the freshness seal and hanging the bag.

Where should I hang the XL in a large room?

Position it slightly above the plant canopy so CO2 settles downward onto the plants below, since CO2 is heavier than air. In rooms with active ventilation, hanging it near the fresh air intake helps distribute CO2 as air circulates.

Do I need more than one XL bag for a large grow room?

For spaces larger than 288 cubic feet, using multiple XL bags positioned at different points in the room maintains more even CO2 coverage than relying on a single bag. Spacing bags across the canopy rather than clustering them in one corner gives more consistent results.