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Dimensioning for storage using desiccant units (DU)

Please note

The values in the chart describe the number of DU required per m² of foil barrier when storing goods in the respective climate zones. This is based on the condition that the stored goods themselves do not contain any moisture.

For storage periods of one year or less, we recommend a foil made of polyethylene (PE) at least 0.2 mm thick.

For storage periods of up to five years, we recommend multilayer barrier film (composite foil made of PE and Aluminum).

Climate zones according to Neef (simplified)
Climate zones with countries Storage periods using
Barrier-film PE foil 0.2 mm
1 yr 2 yrs 3 yrs 4 yrs 5 yrs 3 mon. 6 mon. 1 year
  Polar climate
Alaska (north), Greenland, Canada (north)
8 16 24 32 48 4 8 16
  Subpolar climate
Alaska (south), Iceland, central Canada, Labrador, Newfoundland
8 16 24 32 48 8 12 20
  Cool continental climate
Central USA, south Canada, central Russia
8 16 24 32 48 8 12 20
  Summer-warm continental climate
Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Turkmenistan, Uzbekistan
8 16 24 32 40 6 8 20
  Maritime climate of the Mediterranean climate
Chile (south), Belgium, Denmark, France, United Kingdom, Isle of Man, Luxembourg, Netherlands, New Zealand (south), Norway, Portugal, Tasmania, Ireland, USA (west coast)
8 16 24 32 48 12 20 36
  Transitional climate
Bulgaria, Germany, Finland, Moldavia, Latvia, Lithuania, Austria, Poland, Rumania, Sweden, Switzerland, Montenegro, Czech Republic, Slovakia, Hungary, Ukraine, Hungary, Belarus
8 16 24 32 48 8 16 24
  Sub-tropical climate
North Korea, Russia (east coast), South Korea, USA (east coast)
8 16 32 48 56 6 8 24
  Subtropical climate
Argentina, China (Shanghai), Japan, (south), New Zealand (north), Uruguay, USA (south)
16 32 48 56 64 8 20 36
  Winter-rain climate of the Mediterranean climate
Albania (north), Albania, Algeria (north), Andorra, Armenia, Azerbaijan, Australia (south), Chile (north), Greece, Iraq, Iran (north), Israel, Italy, Jordan, California, Crete, Kuwait, Lebanon, Libya, Morocco, Spain, Syria, Tunesia, Turkey, Cypress
16 24 40 48 64 16 24 48
  Alpine climates
Mongolia, Nepal, Tibet, USA (mountainous)
16 24 40 48 64 8 20 48
  Dry trade wind climate
Afghanistan, Egypt (south), Algeria (south), Angola, Australia (central), Bahrain, Iran (south), Qatar, Oman, Saudi Arabia, Unite Arab Emirates
16 32 48 64 80 16 24 48
  Wet trade wind climate
Argentina, Australia (east coast), Bolivia, Brazil (south), Guadeloupe, Haiti, Honduras, Jamaica, Cuba, Madagascar, Martinique, Mexico, Mozambique, New Caledonia, Puerto Rico, Zimbabwem, South Africa
16 32 48 64 80 16 32 64
  Tropical cyclical climate
Ethiopia, Australia (north), Bangladesh, Benin, Brazil (central), China, (south), Dominican Republic, Ecuador, Guiana, Hawaii Hong Kong, India, Japan, Yemen, Cambodia, Kashmir, Kenya, Laos, Mauritania, Myanmar (Burma), Pakistan, Paraguay, Peru, Zambia, Tanzania, Senegal, Somalia, Sri Lanka, Tahiti, Taiwan, Tanzania, Thailand, Trinidad, Uganda, Venezuela, Vietnam
24 40 56 72 88 16 32 64
  Equatorial climate
Borneo, Brazil (north), Costa Rica, Ivory Coast, French Guiana, Gabon, Ghana, Guatemala, Guinea, Indonesia, Cameroon, Colombia, Congo, Liberia, Malaysia, Mali, Nicaragua, Niger, Nigeria, Panama, Papua New Guinea, Philippines, Republic of Congo, Sumatra, Togo, Chad
24 40 64 80 96 16 32 72
  Number of Dessicant Units (DU)

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