Chief Technology Officer at Smart Fog
Author
Ido Goldstein is a technology innovator with deep expertise in humidity engineering, climate control, and non-wetting fog systems. He has spent years advancing energy-efficient and water-smart solutions that help industries like cleanrooms, data centers, wineries, and greenhouses maintain precise environmental control.
Passionate about technology with real-world impact, Ido also supports sustainable agriculture initiatives and nonprofit innovation. Through this blog, he shares practical insights on HVAC advancements, indoor air quality, and the science behind high-performing environments.
The heat index is the “feels like” temperature — a number that combines actual air temperature with relative humidity to estimate how hot conditions feel to the human body. This guide explains the mechanism, risk thresholds, and the limits of the number itself.
In drying and sealed storage applications, relative humidity gives misleading readings as temperature changes. This guide explains why absolute humidity in g/m³ is the correct metric, how to use it to define a drying endpoint, and what it reveals about sealed storage conditions.
The dew point temperature formula uses the August-Roche-Magnus approximation to calculate the temperature at which air becomes saturated. This guide explains every variable, walks through a numerical example, and provides an interactive calculator for immediate use.
Relative humidity is calculated as the ratio of actual vapor pressure to saturation vapor pressure, expressed as a percentage. This guide presents the RH formula, a step-by-step worked example, and an embedded calculator for immediate results.
Humidity requirements vary significantly by industry, and operating outside the correct range creates regulatory, equipment, and product quality risks. This guide presents specific RH targets by sector, with governing standards and compliance consequences for each.
A thermostat only measures one type of heat. This article explains the difference between sensible and latent heat, why water vapor carries hidden energy, and how that drives up cooling cost in humid environments.
Humidity ratio measures the mass of water vapor per unit mass of dry air. This guide explains what it means, how to locate it on a psychrometric chart, and how to calculate it using the standard psychrometric formula.
Static electricity risk is directly tied to relative humidity, but the answer is not simply “keep it above 40%.” This article breaks down the full RH spectrum zone by zone, showing what happens below, within, and above the recommended range and why both bounds matter for ESD control.
Uncontrolled dew point causes sweating surfaces, floor ice, evaporator blockage, and product spoilage in cold storage. This guide explains how dew point behaves across facility zones and what facility managers need to evaluate to prevent it.
ASHRAE TC9.9 defines specific dew point limits for data center environments, and operating outside those limits creates two distinct failure modes: electrostatic discharge at the low end and condensation at the high end. This article explains the class envelopes, the thresholds, and the operational risks at each boundary.