Cooling Load Factors: roof cts
number 21 to number 30
ASHRAE cooling load calculation factors — people heat gain, lighting power density, luminaire heat fractions, motor efficiency, cooking/warewashing appliance heat gain, office/computer equipment heat gain, glazing optical properties, radiative/convective fractions, surface solar absorptance, wall and roof conduction time series (CTS), construction material layer properties, radiant time series (RTS), zone characteristics, and below-grade heat transfer coefficients. Source: ASHRAE Handbook Fundamentals 2021, Chapter 18.
| factor type | item id | assembly number (dimensionless) | ctf h00 pct | ctf h01 pct | ctf h02 pct | ctf h03 pct | ctf h04 pct | ctf h05 pct | ctf h06 pct | ctf h07 pct | ctf h08 pct | ctf h09 pct | ctf h10 pct | ctf h11 pct | ctf h12 pct | ctf h13 pct | ctf h14 pct | ctf h15 pct | ctf h16 pct | ctf h17 pct | ctf h18 pct | ctf h19 pct | ctf h20 pct | ctf h21 pct | ctf h22 pct | ctf h23 pct | description | total R m2K per W ((m2·K)/W) | u value W per m2K (W/(m2·K)) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| roof cts | number 21 | 21 | 7.2 | 49.6 | 31.9 | 8.7 | 2 | 0.4 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Membrane, Sheathing, R-2.6 Insulation Board Metal Deck | 3.1 | 0.323 |
| roof cts | number 22 | 22 | 0.2 | 9.6 | 27.5 | 25.6 | 16.4 | 9.4 | 5.2 | 2.8 | 1.5 | 0.8 | 0.5 | 0.2 | 0.1 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Membrane, Sheathing, R-5.3 Insulation Board Metal Deck | 5.74 | 0.174 |
| roof cts | number 23 | 23 | 15.4 | 53.6 | 22.6 | 6.1 | 1.6 | 0.4 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Membrane, Sheathing, R-4.4 Insulation Board Metal Deck | 4.02 | 0.249 |
| roof cts | number 24 | 24 | 0.3 | 9 | 21.2 | 19.6 | 14.6 | 10.4 | 7.3 | 5.2 | 3.7 | 2.6 | 1.8 | 1.3 | 0.9 | 0.6 | 0.5 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0 | 0 | 0 | Concrete Roof Ballast Membrane, Sheathing, R-2.6 Insulation Board Metal Deck | 3.37 | 0.297 |
| roof cts | number 25 | 25 | 0.1 | 0.9 | 6.6 | 13.1 | 15.1 | 14 | 11.8 | 9.4 | 7.3 | 5.6 | 4.2 | 3.1 | 2.3 | 1.7 | 1.3 | 1 | 0.7 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | Concrete Insulation Board R-5.3 LW Concrete | 6.01 | 0.166 |
| roof cts | number 26 | 26 | 0.6 | 2 | 7.4 | 11 | 11.2 | 10.1 | 8.8 | 7.6 | 6.5 | 5.6 | 4.8 | 4.1 | 3.5 | 3 | 2.6 | 2.2 | 1.9 | 1.6 | 1.4 | 1.2 | 1 | 0.9 | 0.7 | 0.6 | Sheathing Roof Ballast Insulation Board 100 mm LW Concrete | 3.29 | 0.304 |
| roof cts | number 27 | 27 | 0.8 | 0.8 | 2.1 | 5.1 | 7.8 | 9.1 | 9.3 | 8.8 | 8 | 7.1 | 6.3 | 5.5 | 4.8 | 4.1 | 3.6 | 3.1 | 2.7 | 2.3 | 2 | 1.7 | 1.5 | 1.3 | 1.1 | 1 | Sheathing 100 mm | 5.93 | 0.169 |
| roof cts | number 28 | 28 | 1.5 | 1.6 | 3.2 | 5.7 | 7.3 | 7.8 | 7.6 | 7.1 | 6.6 | 6 | 5.5 | 5 | 4.6 | 4.2 | 3.8 | 3.5 | 3.2 | 2.9 | 2.7 | 2.4 | 2.2 | 2 | 1.8 | 1.7 | 3.38 | 0.296 | |
| roof cts | number 29 | 29 | 1.9 | 1.8 | 1.9 | 2.9 | 4.4 | 5.8 | 6.6 | 6.9 | 6.8 | 6.6 | 6.2 | 5.8 | 5.4 | 4.9 | 4.6 | 4.2 | 3.8 | 3.5 | 3.2 | 3 | 2.7 | 2.5 | 2.3 | 2.1 | 6.02 | 0.166 | |
| roof cts | number 30 | 30 | 2.4 | 2.3 | 2.6 | 3.6 | 4.8 | 5.6 | 6.1 | 6.1 | 6 | 5.8 | 5.6 | 5.3 | 5 | 4.7 | 4.4 | 4.2 | 3.9 | 3.7 | 3.5 | 3.3 | 3.1 | 2.9 | 2.7 | 2.5 | 3.48 | 0.288 |
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