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Glossary

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A I B I C I D I E I F I G I H I I I J I K I L I M I N

O I P I Q I R I S I T I U I V I W I X I Y I Z

 

Density

Mass per unit volume.

I-P units: lb/ft3

 

Dew point

Refers to the temperature at which condensation occurs as the dry-bulb temperature of moist air is lowered.

 

Diffuse

The dispersal of incident solar radiation as a result of a surface's opalescent (transmission) or matte (reflection) quality.

 

Direct gain (DG)

The direct gain system is a passive solar heating strategy consisting of a south-facing glazing that admits incident solar radiation directly into a building's interior where it is absorbed by thermally-massive materials.

 

Dry-bulb (DB) temperature

The air temperature measured using a conventional thermometer.

 

 

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