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.
Heat index is calculated using the NOAA Rothfusz regression equation, which combines air temperature and relative humidity. This guide covers the full formula, a step-by-step worked example, a reference chart, and the conditions under which the formula is and is not valid.
Steam and adiabatic humidification differ by an order of magnitude in energy consumption. This article explains the thermodynamic reasons why, quantifies the operating cost gap, and identifies which facility profiles justify each technology on energy grounds.
Absolute humidity measures the actual mass of water vapor present in a given volume of air, expressed in grams per cubic meter. Unlike relative humidity, it does not change when temperature changes. This article explains the definition, the unit, and why the distinction matters in practice.
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.
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