Bd actual sample results

Page 1

Blower Door Samples - Actuals

Actual Formula Blower Door Variable Readings (tested)

Actual Volume

Formula Variable

(Calculated)

CFM50

60

Volume (CF)

n

Results (Calculated) 5-7 range = good

Results (Converted) Below 0.35 = mech vent req'd

ACH50

ACHn

Sample Tested House: "Tight" Habitat Pochick Ave house 8/3/12 1 story cape, move on, rehab

ACH50 ACHn

645 645

60 60

11960 11960

NA 16.7

3.236

Sample Tested House: "Tight" Hooper Farm Rd 2 story cape, modular

ACH50 ACHn

1333 1333

60 60

14903 14903

NA 13.3

5.367

Sample Tested House: "Leaky" Sunset Hill Lane 1.5 story, garage apartment

ACH50 ACHn

722 722

60 60

5250 5250

NA 15

8.251 leaky

0.550

Sample Tested House: "Leaky" Sunset Hill Main House 1 story home

ACH50 ACHn

3672 3672

60 60

19000 19000

NA 16.7

11.596 leaky

0.694

Reduction 1,821 2,089 1,821 2,376

Percentage 50% 57% 50% 65%

Variable 0.35 5.00 0.35 0.70

Req'd CFMn 110.833 94.810 110.833 77.583

Sunset Hill Main House CFM50 Air Sealing Opportunities: Standard BD Target: Get to 0.35 ACHn ASHRAE 1,851 5 ACH50 target E* Homes 1,583 BPI High 1,851 70% of ASHRAE BPI Low 1,296

0.194

0.404

Real Volumes/CFMs

38700 2317 4186 Yes

CF/hr @50p CF/hr @nat ASHRAE CF/hr @nat standard Needs Mechanical Ventilation?

79980 6014 5216.05 No

CF/hr @50p CF/hr @nat ASHRAE CF/hr @nat standard Needs Mechanical Ventilation?

43320 2888 1837.5 No

CF/hr @50p CF/hr @nat ASHRAE CF/hr @nat standard Needs Mechanical Ventilation?

220320 13193 6650 No

CF/hr @50p CF/hr @nat ASHRAE CF/hr @nat standard Needs Mechanical Ventilation?

BD reading @ ASHRAE CFM50 Standard BD reading - E* Homes CFM50 Standard BD reading - BPI CFM50 Standard - "BAS" BD reading - BPI CFM50 70% of BAS


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