Equilibrium moisture content

The value of the EMC depends on the material and the relative humidity and temperature of the air with which it is in contact.

EMC Business Presentation is The moisture content of grains is an essential property in food storage.

[2] The moisture content of wood below the fiber saturation point is a function of both relative humidity and temperature of surrounding air.

The Hailwood-Horrobin equation for two hydrates is often used to approximate the relationship between EMC, temperature (T), and relative humidity (h):[4][5][6] where Meq is the equilibrium moisture content (percent), T is the temperature (degrees Fahrenheit), h is the relative humidity (fractional) and: This equation does not account for the slight variations with wood species, state of mechanical stress, and/or hysteresis.

This affects the rate that buildings need to dry out after construction, typical cements starting with 40-60% water content.