A flow-hood is a box in which the air is ultra clean – up to 100% without any bacteria, viruses, or mold spores. It is used in microbiology, pharmacy, medical systems, mycology, plant tissue expansion, electronics, aerospace industry, biotechnology, and any other industry that has to do with clean air. It is usually part of the equipment of laboratories.
The price for such an equipment ranges from $500 to several thousands of $. No sweat though because these may be build the low-tech way using random materials and this way the build up cost is under $100. To build one of these you’ll kneed knowledge on how to build an efficient, cheap and fiberglass-free clean air flow-hood
#1 Make mushroom spawn
Once you make spawn you may sell it to anyone interested in growing mushrooms for fun or profit. The investment in this is low if you’ll use low-tech equipment. The market price for spawn is variable but an average would be $25/10 lbs . To avoid starter mistakes you’ll need knowledge on how to make grain and sawdust spawn, some equipment and materials, and a space (a room dedicated solely for this.