1. Air Filtration Device (ADF) ANS >>> Commonly called an air scrubber or
negative air machine if airborne particles need to be reduced, you could use an
appropriately installed
2. Air Filtration Device ANS >>> AFD
3. Assembly Construction ANS >>> Prior to determining the best drying system for
affected materials, restorers should identify and understand the assembly
,construction (ie wall assembly, floor assembly)
4. Category 1 ANS >>> water originates from a sanitary source and does not pose
substan- tial risk for dermal, ingestion, inhalation, or exposure. Uncontaminated and
routinely cleaned
5. Category 2 ANS >>> water contains significant contamination and has the
potential to cause discomfort or sickness if contacted or consumed by humans
6. Category 3 ANS >>> water is grossly contaminated and can contain pathogenic,
toxigenic, or other harmful agents
7. Sewage Back Up ANS >>> Category 3
8. Clean water supply line ANS >>> Category 1
9. Class 1 ANS >>> Least amount of water absorption and evaporation load - Wet
porous materials - water loss is less then 5% of the area
10. Class 2 ANS >>> Significant amount of water absorption and evaporation load
- water intrusion where wet represents 5% - 40% of the area.
,11. Class 3 ANS >>> greatest amount of water absorption and evaporation
load. Water intrusion where wet represents over 40% of the area
12. Class 4 ANS >>> 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.
13. Closed drying system ANS >>> 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.
14. Conventual refrigerant dehumidifier ANS >>> 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.
15. Combination Drying System ANS >>> 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
16. Desiccant dehumidifier ANS >>> Removes water vapor from the air through
absorption. Usually requires more amperage as compared to refrigerant
dehumidifier. Desic- cants 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
17. Infiltration ANS >>> High humidity outside air could affect the drying climate
adversely due to
18. 1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density ANS >>> Favors that affect the detailed dehumidifier calculation
negative air machine if airborne particles need to be reduced, you could use an
appropriately installed
2. Air Filtration Device ANS >>> AFD
3. Assembly Construction ANS >>> Prior to determining the best drying system for
affected materials, restorers should identify and understand the assembly
,construction (ie wall assembly, floor assembly)
4. Category 1 ANS >>> water originates from a sanitary source and does not pose
substan- tial risk for dermal, ingestion, inhalation, or exposure. Uncontaminated and
routinely cleaned
5. Category 2 ANS >>> water contains significant contamination and has the
potential to cause discomfort or sickness if contacted or consumed by humans
6. Category 3 ANS >>> water is grossly contaminated and can contain pathogenic,
toxigenic, or other harmful agents
7. Sewage Back Up ANS >>> Category 3
8. Clean water supply line ANS >>> Category 1
9. Class 1 ANS >>> Least amount of water absorption and evaporation load - Wet
porous materials - water loss is less then 5% of the area
10. Class 2 ANS >>> Significant amount of water absorption and evaporation load
- water intrusion where wet represents 5% - 40% of the area.
,11. Class 3 ANS >>> greatest amount of water absorption and evaporation
load. Water intrusion where wet represents over 40% of the area
12. Class 4 ANS >>> 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.
13. Closed drying system ANS >>> 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.
14. Conventual refrigerant dehumidifier ANS >>> 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.
15. Combination Drying System ANS >>> 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
16. Desiccant dehumidifier ANS >>> Removes water vapor from the air through
absorption. Usually requires more amperage as compared to refrigerant
dehumidifier. Desic- cants 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
17. Infiltration ANS >>> High humidity outside air could affect the drying climate
adversely due to
18. 1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density ANS >>> Favors that affect the detailed dehumidifier calculation
