Minnesota Administrative Rules
Agency 151 - Labor and Industry Department
Chapter 1323 - COMMERCIAL ENERGY CODE
Part 1323.0642 - SECTION 6.4.2, CALCULATIONS

Universal Citation: MN Rules 1323.0642

Current through Register Vol. 49, No. 13, September 23, 2024

Subpart 1. 6.4.2.1.1 Climatic data design conditions.

ASHRAE 90.1 section 6.4.2.1 is amended by adding a subsection to read as follows:

6.4.2.1.1 Climatic data design conditions.

Climatic data design conditions for the calculation of heating and cooling loads shall be determined by using either item 1 or 2:

1. the climatic data in Table 6.4.2.1 for the city where the building is located or the nearest city listed in Table 6.4.2.1; or

2. the weather data published as a part of ASHRAE Standard 169-2013 at www.ASHRAE-meteo.info. The weather data for the city where the building is located or for the nearest available city shall be used. The data shall be used as follows:
(a) design temperatures shall be rounded to the nearest whole number;

(b) winter design conditions shall be the mean extreme annual temperature; and

(c) summer conditions shall be the one percent annual cooling design conditions.

Subp. 2. Table 6.4.2.1. Climatic data design conditions.

ASHRAE 90.1 section 6.4.2.1 is amended by adding a table to read as follows:

TABLE 6.4.2.1 CLIMATIC DATA DESIGN CONDITIONS

City

Winter Design db °F

Summer db °F/coincident wb °F

Aitkin

-28

82/72

Albert Lea

-19

86/72

Alexandria

-23

85/70

Bemidji

-30

82/67

Brainerd

-27

85/69

Cloquet

-24

82/68

Crookston

-28

84/70

Duluth

-23

81/67

Ely

-34

82/67

Eveleth

-31

82/67

Faribault

-21

88/73

Fergus Falls

-26

85/70

Grand Marais

-19

73/62

Grand Rapids

-25

82/67

Hibbing

-31

82/68

International Falls

-35

82/67

Litchfield

-20

86/72

Little Falls

-26

86/70

Mankato

-16

86/72

Minneapolis/St. Paul

-17

88/72

Montevideo

-19

88/73

Mora

-24

86/70

Morris

-23

86/72

New Ulm

-19

88/73

Owatonna

-19

86/72

Pequot Lakes

-31

85/68

Pipestone

-19

86/73

Redwood Falls

-19

88/73

Rochester

-19

85/72

Roseau

-31

84/72

St. Cloud

-24

86/71

Silver Bay

-28

82/66

Thief River Falls

-27

82/68

Tofte

-14

75/61

Virginia

-31

82/67

Warroad

-32

82/70

Wheaton

-23

86/72

Willmar

-22

86/72

Winona

-18

88/73

Worthington

-16

86/71

Db = dry bulb temperature, degrees Fahrenheit

Wb = wet bulb temperature, degrees Fahrenheit

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