ASHRAE 90.1 - 2013 - US Units

Office

Space Uses Parameters:

Parameter

Value (For all climate locations)

Lighting power density (W/ft2)

0.8

Plug Load power density (W/ft2)

0.8

Heating Setpoint (F)

66.2

Cooling Setpoint (F)

71.6

Occupant Density

1 person / 150 ft2

 

Envelope parameters: 

Parameter\Climate zone

1

2

3

4

5

6

 

Roof R-Value (ft2.h.F/BTU)

20.81

25.82

25.82

30.87

30.87

30.87

Wall R-Value (ft2.h.F/BTU)

1.73

6.63

8.14

9.63

11.12

12.51

Floor R-Value (ft2.h.F/BTU)

3.11

9.36

13.52

17.69

17.75

19.79

Glazing U-Value (BTU/ft2.h.F)

0.51

0.41

0.36

0.36

0.33

0.33

Glazing SHGC

0.25

0.25

0.25

0.4

0.4

0.4

Infiltration rate (cfm/ft2)

0.394

0.394

0.394

0.394

0.394

0.394

 

HVAC Parameters:

Parameter

Value (For all climate locations)

Heating Efficiency

0.85

Cooling Efficiency

3

Ventilation Rate (cfm/ft2)

0.06

 

Residential 

Space Uses Parameters:

Parameter

Value (For all climate locations)

Lighting power density (W/ft2)

0.5

Plug Load power density (W/ft2)

0.3

Heating Setpoint (F)

66.2

Cooling Setpoint (F)

71.6

Occupant Density

1 person / 398 ft2

 

Envelope parameters: 

Parameter\Climate zone

1

2

3

4

5

6

 

Roof R-Value (ft2.h.F/BTU)

25.82

25.82

25.82

30.87

30.87

30.87

Wall R-Value (ft2.h.F/BTU)

6.63

8.14

9.63

11.07

12.51

14.09

Floor R-Value (ft2.h.F/BTU)

3.11

11.50

13.52

19.79

19.79

19.79

Glazing U-Value (BTU/ft2.h.F)

0.51

0.41

0.36

0.36

0.33

0.33

Glazing SHGC

0.25

0.25

0.25

0.4

0.4

0.4

Infiltration rate (cfm/ft2)

0.394

0.394

0.394

0.394

0.394

0.394

 

 

HVAC Parameters:

Parameter

Value (For all climate locations)

Heating Efficiency

0.85

Cooling Efficiency

3

Ventilation Rate (cfm/ft2)

0.04

 

 

The sources for the EUI benchmarks are:

  1. US Residential: 2003 Residential Energy Consumption Survey (RECS)
  2. US Office: 2003 Commercial Buildings Energy Consumption Survey (CBECS)
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Comments

  • Avatar
    Kevin Clark

    The envelope parameters above for insulation values are listed as U-Values, but I'm guessing that they are really R-values to simplify entry into Sefaira Concept (which uses R-values, not U-values).  Is that correct? 

  • Avatar
    Simon Sawada

    Hi Kevin,

    thanks a lot for the feedback, that is very useful. This is indeed an R-Value, I will correct that right now. 

    Best Regards,

    Simon