These figures belong to the named source and method. Historical costs are not current quotations. A value without its stage, material basis or measurement location is not a farm instruction.
| What is measured | Value and basis | Source and limitation |
|---|---|---|
| Carbon dioxide at spawn run | 10000-15000 ppm | ICAR-DMR manual, 2011. A closed room is a confined space |
| Engineering sign off | qualified review rule | MushroomFarming.in guide. Refrigeration and electrical design need a licensed engineer |

