Recommended Relative Humidity in Production and Process Environments

Recommended Relative Humidity - RH - in production and process environments like libraries, breweries, storages and more

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To avoid damage of products, or to achieve proper process conditions, it is often important to keep the environment and the indoor climate within certain temperature and humidity limits.

Low relative humidity may dry up the product, or high relative humidity may increase the water activity growing mould in the production process lines.

The table below can be used as a guidance to recommended Relative Humidity - RH - in some common production and process environments.

Production and Process Environment Recommended Relative Humidity
- RH -
(%)
Sugar Storage 20 - 35%
Breweries 35 - 45%
Coffee Powder 30 - 40%
Milk Powder Storage 20 - 35%
Seed Storage 35 - 45%
Unpacked Medicine 20 - 35%
Transformer Winding 15 - 30%
Semiconductors 30 - 50%
Books and Paper Archive 40 - 55%
Paper Storage 35 - 45%
Preventing Rust and Corrosion below 55%,
< 40% for no rust generation
Library 50 - 55%
Spray Paint 30 - 50%
Laboratory electronics 45 - 60%
Plastic Pallets 5 - 30%
Computer Peripherals 50 - 60%
Rust Resistance Below 40%
Medical Syrups 30 - 40%
Capsule Storage 30 - 45%
Powder Storage 30 - 45%
Wood Drying 25 - 35%
Explosives 35 - 50%
Note! low RH may generate static electricity and spark ignitions
Normal Storage 50 - 55%
Musical Instrument 45 - 55%
Leather Product 40 - 55%
Cable Wrapping 15 - 25%
Chemical Laboratory 30 - 45%

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Related Topics

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Related Documents

  • Absolute Humidity of Air - Humidity - or moist - is the water vapor present in air. Commonly used terms are Absolute, Specific and Relative Humidity
  • Humidity Ratio of Air - Humidity ratio (GPP) is the ratio between actual mass of water vapor present in moist air - to the mass of dry air
  • Mollier Diagram  - The Mollier diagram is a graphic representation of the relationship between air temperature, moisture content and enthalpy - and is a basic design tool for building engineers and designers
  • Outdoor to Indoor Temperature Rise and Relative Humidity - The relationship between outdoor and indoor temperature rise - and the effect on the relative humidity
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