David Sandelman, the co-founder of VT Dry and Cure Technologies and the creator of Cantrol systems, shares his journey in the HVAC industry and how he stumbled upon the idea of using his technology for drying and curing cannabis. He explains the importance of maintaining a specific water activity level in cannabis flowers to prevent mold and microbial growth. David discusses how Cantrol systems work and how they can be used for both home and commercial purposes. He also highlights the benefits of using Cantrol systems, such as preserving the quality and characteristics of cannabis flowers and reducing labor and guesswork in the drying and curing process.