IICRC - Applied Structural Drying questions and answers
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IICRC - Applied Structural Drying
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IICRC - Applied Structural Drying
Air Filtration Device (ADF)
Commonly called an air scrubber or negative air machine if airborne particles need to be reduced, you could use an appropriately installed _______ ________ ________
Air Filtration Device
AFD
Assembly Construction
Prior to determining the best drying syst...
IICRC - Applied Structural Drying
questions and answers
Air Filtration Device (ADF) - answer Commonly called an air scrubber or negative air machine if airborne
particles need to be reduced, you could use an appropriately installed _______ ________ ________
Air Filtration Device - answer AFD
Assembly Construction - answer Prior to determining the best drying system for affected materials,
restorers should identify and understand the assembly construction (ie wall assembly, floor assembly)
Category 1 - answer water originates from a sanitary source and does not pose substantial risk for
dermal, ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned
Category 2 - answer water contains significant contamination and has the potential to cause discomfort
or sickness if contacted or consumed by humans
Category 3 - answer water is grossly contaminated and can contain pathogenic, toxigenic, or other
harmful agents
Sewage Back Up - answer Category 3
Clean water supply line - answer Category 1
Class 1 - answer Least amount of water absorption and evaporation load - Wet porous materials - water
loss is less then 5% of the area
Class 2 - answer Significant amount of water absorption and evaporation load - water intrusion where
wet represents 5% - 40% of the area.
, Class 3 - answer greatest amount of water absorption and evaporation load. Water intrusion where wet
represents over 40% of the area
Class 4 - answer deeply held or bound water. Significant amount of water absorption into low
evaporation materials. Drying may require special drying methods, longer drying time, or substantial
water vapor pressure differentials.
Closed drying system - answer Uses mechanical dehumidification and is not open to outside air. Used if
there are security issues, the outside air is not conductive to drying or when access to outside air is not
possible.
Conventual refrigerant dehumidifier - answer Removes water vapor from the air by lowering the
temperature of the incoming air to below dew point and causing the water to condense on the coils.
Cold and hot surfaces created with gases inside a closed coil system.
Combination Drying System - answer uses some outdoor air with dehumidifiers to accelerate the drying
process. This can include periodically venting (flushing) the structure, using negative pressure or using
small openings to the outside
Desiccant dehumidifier - answer Removes water vapor from the air through absorption. Usually requires
more amperage as compared to refrigerant dehumidifier. Desiccants create the lowest vapor pressure
which work best on low porosity materials. When a desiccant dehu is drawing outside air and ducting
processed air inside a building it can create positive pressure in the building. To improve desiccant dehu
performance, it may be beneficial to pre-cool the desiccants air intake
Infiltration - answer High humidity outside air could affect the drying climate adversely due to
______________
1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density - answer Favors that affect the detailed dehumidifier calculation is:
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