Ventilation Conundrum
 

Introduction
Hypothesis
Methodology
Data & Results
Blower Door  
CO2 Monitor  
Berkeley Climate  
Analysis
Conclusion


Appendix
Acknowledgements
 

 Data & Results
 Berkeley Climate Data

Heating Degree Days

Period of Record General Climate Summary - Heating Degree

Station:(040693) BERKELEY

From Year=1919 To Year=2000

Heating Degree Days for Selected Base Temperature (F)

Base

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

Annual
65 478 357 346 282 218 137 115 102 86 138 274 447 2980
60 324 218 198 144 85 33 17 13 11 36 137 293 1509
57 233 140 119 74 30 6 2 1 1 9 72 204 891
55 175 95 75 40 10 1 0 0 0 3 41 149 590
50 62 22 12 4 0 0 0 0 0 0 5 47 153

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.

Table updated on Jul 10, 2000
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Source: Western Regional Climate Center, wrcc@dri.edu

Cooling Degree Days

Period of Record General Climate Summary - Cooling Degree Days

Station:(040693) BERKELEY

From Year=1919 To Year=2000

Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 7 21 40 63 112 183 208 221 249 195 69 12 1381
57 3 10 22 37 69 127 148 160 190 140 40 5 951
60 0 3 8 17 32 64 70 79 110 74 15 1 474
65 0 0 1 5 9 19 13 13 35 21 2 0 118
70 0 0 0 1 3 6 3 1 11 4 0 0 29

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.

Table updated on Jul 10, 2000
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Source: Western Regional Climate Center, wrcc@dri.edu

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By installing new windows in the residence rooms at the Berkeley YMCA the ventilation rate will fall below the ASHRAE standards.