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Building Design and Construction Handbook - Merritt - Ventech!

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13.44 SECTION THIRTEEN<br />

TABLE 13.11 Heat-Load Determined for Two-Story <strong>Building</strong><br />

Space<br />

(1)<br />

Heat-loss<br />

source<br />

(2)<br />

Net area<br />

or cfm<br />

infiltration<br />

(3)<br />

U or<br />

coefficient<br />

(4)<br />

Temp<br />

gradient,<br />

�F<br />

(5)<br />

Heat<br />

loss,<br />

Btu<br />

per hr<br />

(6)<br />

Total<br />

plus<br />

20%<br />

(7)<br />

Cellar Walls 1,170 4 4,680<br />

Floor 1,000 2 2,000<br />

1<br />

⁄2 air change 71.2 1.08 70 5,400 14,500<br />

First-floor store Walls 851 0.25 70 14,900<br />

Glass 135 1.13 70 10,680<br />

Doors 128 0.69 70 1,350<br />

1 air change 170 1.08 70 12,850 47,600<br />

Vestibule Glass 48 1.13 70 3,800<br />

2 air change 12 1.08 70 905 5,650<br />

Office Walls 99 0.25 70 1,730<br />

Glass 21 1.13 70 1,660<br />

1<br />

⁄2 air change 9 1.08 70 680 4,900<br />

Men’s room Walls 118 0.25 70 2,060<br />

Glass 6 1.13 70 48<br />

1<br />

⁄2 air change 3 1.08 70 226 2,800<br />

Ladies’ room Walls 60 0.25 70 1,050<br />

Glass 6 1.13 70 48<br />

1<br />

⁄2 air change 3 1.08 70 226 1,590<br />

Second-floor office No. 1 Walls 366 0.25 70 6,400<br />

Glass 120 1.13 70 9,500<br />

Roof 606 0.19 70 8,050<br />

1<br />

⁄2 air change 50 1.08 70 3,780 33,300<br />

Office No. 2 Walls 207 0.25 70 3,620<br />

Glass 72 1.13 70 5,700<br />

Roof 234 0.19 70 3,120<br />

1<br />

⁄2 air change 19 1.08 70 1,435 16,650<br />

Men’s room Walls 79 0.25 70 1,380<br />

Glass 6 1.13 70 475<br />

Roof 20 0.19 70 266<br />

1<br />

⁄2 air change 3 1.08 70 226 2,820<br />

Ladies’ room Walls 44 0.25 70 770<br />

Glass 6 1.13 70 475<br />

Roof 20 0.19 70 266<br />

1<br />

⁄2 air change 3 1.08 70 226 2,080<br />

Hall Walls 270 0.25 70 4,720<br />

Door 21 0.69 70 1,015<br />

Roof 75 0.19 70 1,000<br />

2 air change 40 1.08 70 3,020 12,585<br />

144,475

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