
The ExHale 365 CO2 Bag Runs for Nine Months
CO2 supplementation usually means a tank, a regulator and a controller. This is none of those. Living mycelium growing on organic matter produces the gas as a by-product of its own metabolism. The bag feeds a 4x4 ft footprint, which is about 128 cubic feet of tent. Output runs for up to nine months, with the first six at peak production. There is no power draw, no heat and nothing to refill. A separation seal on the bag doubles as the hanger. Activation happens once, by breaking that seal, and then it is left alone. It is suitable for certified organic production. ExHale make it in the USA.
Where a Self Activated Mycelium Bag Belongs in a Tent
Placement decides whether this works or not. Carbon dioxide is heavier than air, so the bag hangs just above the canopy and lets the gas fall onto the leaves. Too high and it disperses before it reaches anything. If a fan is running, put the bag near the fresh-air intake so the gas gets distributed. Heavy exhaust works against you, because it pulls the gas straight out of the room. Sealed or lightly vented spaces get far more from it than a hard-exhausted one. Keep it out of direct water. Supplementing carbon dioxide only pays when light and nutrition are already dialled in. In a room limited by something else, this will not be the fix.
Key Features
- Coverage: a 4x4 ft footprint, roughly 128 cubic feet
- Duration: up to nine months, with the first six at peak output
- No Equipment: no tank, no regulator, no controller and no power
- No Heat: mycelium makes the gas biologically, not by burning anything
- Built-In Hanger: the separation seal doubles as the hanging point
- One-Time Activation: break the seal once and leave it alone
- Organic Production: suitable for certified organic growing
- Made in the USA: produced by ExHale in the United States

Technical Specifications
| Specification | Value |
|---|---|
| Coverage | 4x4 ft (about 128 cu ft) |
| CO2 Supply | Up to 9 months |
| Peak Production | First 6 months |
| Type | Self-activated mycelium CO2 cultivator |
| Power Required | None |
| Heat Produced | None |
| Activation | One-time; separation seal doubles as hanger |
| Organic | Suitable for certified organic production |
| Origin | Made in the USA |