Install Instructions

115
IM-PR 566442 1114 (Design Manual)
Location
Time, h/yr
2% Min.
Snow
Temp., °F
Annual Energy Requirement per Unit Area at Steady-State Conditions
a
, Btu/ft ²
System Designed for
A
r
= 1
System Designed for
A
r
= 0.5
System Designed for
A
r
= 0
Melting Idling Melting Idling Melting Idling Melting Idling
Albany, NY 156 1,883 9.3 10,132 109,230 7,252 109,004 4,371 108,420
Albuquerque, NM 44 954 16.3 2,455 38,504 1,729 38,495 984 38,332
Amarillo, TX 64 1,212 6.8 5,276 62,557 3,314 62,136 1,357 61,170
Billings, MT 225 1,800 -10.8 17,299 116,947 10,526 111,803 3,716 91,360
Bismarck, ND 158 2,887 -8.8 16,295 207,888 9,321 201,565 2,300 157,503
Boise, ID 85 1,611 5.3 3,543 74,724 2,449 73,015 1,345 68,456
Boston, MA 112 1,273 16.3 7,694 77,992 5,455 77,907 3,218 77,747
Buffalo, NY 292 1,779 3.8 23,929 105,839 14,735 105,521 5,563 101,945
Burlington, VT 204 2,215 4.3 13,182 147,122 8,485 143,824 3,783 134,634
Cheyenne, WY 224 2,152 -15.8 20,061 126,714 11,931 125,635 3,782 120,915
Chicago, IL, O'Hare
International Airport
124 1,854 3.8 8,501 116,663 5,402 112,763 2,252 100,427
Cleveland, OH 188 1,570 8.8 11,419 86,539 7,359 85,470 3,208 80,851
Colorado Springs, CO 159 1,925 -8.8 11,137 97,060 7,089 96,847 3,026 96,244
Columbus, OH,
International Airport
92 1,429 12.8 4,581 71,037 2,972 68,002 1,367 62,038
Des Moines, IA 127 1,954 -1.8 10,884 128,140 6,796 125,931 2,654 116,545
Detroit, MI,
Metro Airport
153 1,781 11.3 10,199 104,404 6,467 102,289 2,704 95,777
Duluth, MN 238 3,206 0.3 20,838 251,218 12,423 236,657 3,969 187,820
Ely, NV 153 2,445 13.3 7,421 141,288 5,268 139,242 3,098 136,920
Eugene, OR 18 481 15.8 841 17,018 634 16,997 429 16,992
Fairbanks, AK 288 4,258 -15.8 19,803 343,674 11,700 318,880 3,559 194,237
Baltimore, MD, BWI Airport 56 957 16.3 3,827 45,132 2,970 45,132 2,121 45,130
Great Falls, MT 233 1,907 -15.8 19,703 123,801 11,731 120,603 3,736 101,712
Indianapolis, IN 96 1,473 10.8 6,558 80,942 4,132 78,532 1,705 75,926
Lexington, KY 50 1,106 13.3 2,696 54,084 1,718 52,278 733 45,859
Madison, WI 161 2,308 5.3 11,404 149,363 7,279 147,112 3,094 140,108
Memphis, TN 13 473 12.8 1,010 21,756 691 21,518 373 21,102
Milwaukee, WI 161 1,960 7.3 11,678 127,230 7,564 123,960 3,431 119,945
Minneapolis-St. Paul, MN 199 2,513 0.3 16,532 183,980 10,325 178,495 4,097 166,921
New York, NY,
JFK Airport
61 885 18.3 4,193 50,680 2,988 50,467 1,797 50,049
Oklahoma City, OK 35 686 6.8 2,955 40,957 1,850 39,725 741 38,308
Omaha, NE 94 1,981 -2.3 7,425 124,274 4,613 119,565 1,790 112,700
Peoria, IL 91 1,748 2.3 6,544 104,380 4,078 100,581 1,606 94,045
Philadelphia, PA,
International Airport
56 992 18.3 3,758 50,494 2,669 50,412 1,588 50,203
Pittsburgh, PA,
International Airport
168 1,514 9.3 10,029 79,312 6,350 77,750 2,626 72,361
Portland, ME 157 1,996 7.3 13,318 115,248 8,969 115,196 4,630 114,836
Portland, OR 15 329 21.8 623 13,399 464 13,194 310 12,918
Rapid City, SD 177 2,154
-4.8 16,889 137,523 9,738 135,024 2,535 106,102
Reno, NV 63 1,436 16.3 2,293 54,713 1,792 54,706 1,302 54,703
Salt Lake City, UT 142 1,578 16.3 5,263 70,254 4,271 69,927 3,286 69,927
Sault Ste. Marie, MI 425 2,731 -0.3 34,249 176,517 20,779 174,506 7,250 155,508
Seattle, WA 27 260 17.8 1,212 10,482 943 10,473 682 10,452
Spokane, WA 144 1,832 10.8 6,909 81,000 4,721 79,177 2,512 75,659
Springeld, MO 58 1,108 6.8 4,401 57,165 2,950 56,929 1,503 56,238
St. Louis, MO,
International Airport
62 1,150 6.8 4,516 64,668 2,981 63,428 1,446 60,764
Topeka, KS 61 1,409 -1.8 4,507 75,598 2,821 74,028 1,126 68,402
Wichita, KS 60 1,223 0.3 4,961 69,187 3,106 67,828 1,229 60,991
Table 5-17 Annual snow melting energy requirements (Btu/ft²) by city and snow-free area ratio
37
a. Does not include back and edge heat losses.
b. Multiply values by 2.93 x 10
-4
to convert to kWh/ft²
37. ©ASHRAE Handbook -- Systems and Equipment. p.50.9. 2008.