10
Location
4.0 INSTALLATION
4.3.4 Ground Snow Depth Table
NOTICE:
Local records and experience must be considered when establishing the unit installation height. There is a 2% probability that
the ground snow depth shown in this table will be exceeded annually. Drifts have not been considered. This data represents 184
National Weather Service locations at which measurements are made and assumes a nationwide snow density of 12 lb./ft.
3
ALABAMA INDIANA MINNESOTA NEW MEXICO PENNSYLVANIAVIRGINIA
Huntsville 7
Evansville 12 Duluth 64 Albuquerque 4 Allentown 23 Dulles Airport 19
RIZONA Fort Wayne 17 International Falls 43 Clayton 10 Erie 19 Lynchburg 16
f 48 Indianapolis 21
Minneapolis/St. Paul
50 Roswell 8 Harrisburg 23 National Airport 18
South Bend 44 Rochester 50 NEW YORK Philadelphia 16 Norfolk 9
7 IOWA St. Cloud 53 Albany 25 Pittsburgh 22 Richmond 12
RKANSAS Burlington 17 MISSISSIPPI Binghamton 35 Scranton 16 Roanoke 17
Fort Smith 5 Des Moines 22 Jackson 3 Buffalo 42 Williamsport 20 WASHINGTON
Dubuque 38 MISSOURI
NYC – Kennedy Airport 18
RHODE ISLAND Olympia 24
A Sioux City 33 Columbia 21
NYC – LaGuardia Airport 18
Providence 21 Quillayute 24
Blue Canyon 25 Waterloo 36 Kansas City 18 Rochester 38 SOUTH CAROLINA Seattle-Tacoma 14
9 KANSAS St. Louis 16 Syracuse 35 Columbia 12 Spokane 41
Concordia 23 Spring eld 14 NORTH CAROLINA Greenville 4 Stampede Pass 51
Dodge City 12 MONTANA Asheville 12 SOUTH DAKOTA Yakima
Colorado Springs 14 Goodland 14 Billings 17 Cape Hattaras 5 Aberdeen 42 WEST VIRGINIA
5 Topeka 19 Glasgow 17 Charlotte 10 Huron 43 Beckley 51
Wichita 11 Great Falls 16 Greensboro 11 Rapid City 14 Charleston 20
KENTUCKY Havre 24 Raleigh-Durham 10 Sioux Falls 38 Elkins 21
Covington 12 Helena 18 Wilmington 9 TENNESSEE Huntington 15
Lexington 12 Kalispell 53 Winston-Salem 17 Bristol 8 WISCONSIN
d 29 Louisville 11 Missoula 23 NORTH DAKOTA Chattanooga 6 Green Bay 36
5 MAINE NEBRASKA Bismarck 25 Knoxville 8 La Crosse 32
AWARE Caribou 100 Grand Island 30 Fargo 34 Memphis 5 Madison 32
Portland 62 Lincoln 20 Williston 25 Nashville 8 Milwaukee 32
MARYLAND Norfolk 29 OHIO TEXAS WYOMING
Baltimore 17 North Platte 15 Akron-Canton 15 Abilene 6
MASSACHUSETTS Omaha 20 Cleveland 16 Amarillo 10 Cheyenne 15
Boston 30 Scottsbluff 11 Columbus 10 Dallas 3 Lander 20
Nantucket 18 Valentine 22 Dayton 11 El Paso 5 Sheridan 25
Worcester 35 NEVADA Mans eld 17 Fort Worth 6
MICHIGAN Elko 20 Toledo Express 8 Lubbock 10
Alpena 53 Ely 9 Youngstown 12 Midland 2
Detroit City 9 Reno 11 OKLAHOMA San Antonio 3
Detroit Airport 17 Winnemucca 6 Oklahoma City 5 Wichita Falls 5
7
Detroit – Willow Run
21 NEW HAMPSHIRE Tulsa 8 UTAH
Flint 28 Concord 66 OREGON Milford 16
d 25 Grand Rapids 37 NEW JERSEY Burns City 24 Salt Lake City 8
eld 23 Houghton Lake 56 Atlantic City 11 Eugene 17 Wendover 3
Lansing 42 Newark 15 Medford 8 VERMONT
Marquette 53 Pendleton 11 Burlington 37
Muskegon 43 Portland 10
Sault Ste. Marie 80 Salem 7
GROUND SNOW DEPTH – INCHES
4.3.3 Elevating Unit
WARNING: Secure an elevated unit and
its elevating stand in order to prevent tipping. Failure to
do so may result in severe personal injury or death.
If elevating the heat pump, either on a flat roof or on a
slab, observe the following guidelines.
• If elevating a unit on a flat roof, use 4" x 4"
[10.2 cm x 10.2 cm] or equivalent stringers positioned
to distribute unit weight evenly and prevent noise and
vibration.
• Where snowfall is anticipated, raise the unit above
the base pad to prevent ice buildup and coil damage.
Mount the unit high enough to be above the average
accumulated area snowfall. See “Ground Snow Depth”
chart below for representative snow depths.
NOTICE: Do not block drain openings on
bottom of unit.
• If unit must be elevated because of anticipated
snowfall, secure unit and elevating stand such that
unit and/or stand will not tip over or fall off. Keep
in mind that someone may try to climb on unit.
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