Why Farmers Get Humidity Completely Wrong

Vertical Farming Podcast
Vertical Farming PodcastMay 9, 2026

Why It Matters

Accurate humidity management enables farmers to optimize irrigation and climate control, boosting yields while cutting energy and water costs.

Key Takeaways

  • Relative humidity cannot be directly dialed like a thermostat.
  • Humidity depends on temperature and moisture content, not a single control.
  • Air conditioners simultaneously cool and dehumidify, altering both variables.
  • Farmers often misinterpret humidity, leading to ineffective climate strategies.
  • Changing temperature or moisture alone indirectly shifts relative humidity levels.

Summary

The video tackles a common misconception among farmers: that relative humidity can be directly controlled like temperature. Using a bank‑loan analogy, the presenter argues there is no simple dial for humidity because it is a function of two variables—air temperature and absolute moisture content.

Key insights highlight that any attempt to “set” humidity inevitably changes either temperature, moisture, or both. Air‑conditioning units illustrate this dual effect: they cool the air while simultaneously removing moisture, thereby shifting relative humidity without a single control knob.

A memorable quote from the talk underscores the point: “controlling relative humidity directly really doesn't exist as mathematical or science.” The speaker also stresses that relying on equipment alone, without understanding the underlying variables, leads to misguided climate management on farms.

The implication for agricultural operations is clear: growers should focus on managing temperature and moisture independently rather than chasing a target humidity level. Properly aligning irrigation, ventilation, and heating strategies can improve crop health, reduce energy waste, and enhance overall productivity.

Original Description

Discover the cutting-edge world of vertical farming and controlled environment agriculture (CEA) with David Sandelman, CTO of Cannatrol, in this exclusive episode of the Vertical Farming Podcast. Dive deep into the future of sustainable food production as David Sandelman reveals how climate-controlled technology is revolutionizing indoor farming, post-harvest processing, and the consistency of high-value crops—including cannabis, cheese, charcuterie, and even hops. Learn why precise management of vapor pressure and water activity is transforming yield, quality, shelf life, and profitability for entrepreneurs, investors, and AgTech professionals. From reducing mold risk to maximizing terpene and flavor retention, this conversation unpacks the essential science and scalable solutions driving success in modern indoor agriculture. Whether you’re exploring investment opportunities, scaling your grow operation, or just curious about the advantages of next-generation indoor farming, this episode delivers actionable insights and inspiration for anyone interested in ag innovation, resource efficiency, and the future of food.
Ep. 181 - David Sandelman/Canatrol
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#verticalfarming, #humidityontrol, #climatescience, #growroomtech, #indoorfarming, #smartenvironmen, #HVACbasics, #scienceexplained, #agtechtalk

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