Glazing

Question 1

4 main functions of windows

Answer 1

Heat transfer
Daylight access
Solar Heat Gain
Infiltration (Air leakage)

Question 1

4 main functions of windows

Answer 1

Heat transfer
Daylight access
Solar Heat Gain
Infiltration (Air leakage)

Question 2

U-value

Answer 2

The measure of the rate of non-solar heat loss or gain through a material or assembly

Question 3

The u-value depends on

Answer 3

of glasses
Thickness of cavity
Choice of cavity gas
Number of low emissivity coatings

Question 4

What are U-value units?

Answer 4

W/m2k

Question 5

SHGC (Solar Heat Coefficient)

Answer 5

The fraction of solar radiation emitted through a window, both directly and absorbed and subsequently released inward.
Expressed as a # 0-1
.40 is recomended

Question 6

Air leakage in windows

Answer 6

Heat loss or gain through cracks in window assembly
Air leakage rating

Question 7

What is the ideal ratio of glazing?

Answer 7

35%, never more than 50%

Question 8

Higher windows enable greater

Answer 8

depth of penetration

Question 9

Tinded Glazing

Answer 9

Absorbing glass, has energy absorbing materials within it, lowering the shading coefficient and giving a tint-generally bronze, gray, blue, green.

Question 10

Reflective glass

Answer 10

Reflect most of the infrared heat. The reflective coating is made of thin layers of metals or metallic oxides

Question 11

Spectrally selective glazing

Answer 11

Allows for light to pass through without the heat