HomeMy WebLinkAbout4700 LADY MOON DR - DISCLOSURES - 6/18/2015WHOLE BUILDING AIR TEST REPORT
Rendered to:
E CUBE, INC.
PROJECT: Banner Fort Collins Medical Center
Fort Collins, Colorado
Project No.: D4195.01-601-50
Report No.: 1
Test Date: 02/20/15
Report Date: 03/09/15
130 Derry Court
York, PA 17406
p. 717.764.7700
f. 717.764.4129
www.archtest.com www.intertek.com/building
WHOLE BUILDING AIR TEST REPORT
Rendered to:
E Cube, Inc.
1900 Folsom Street
Boulder, Colorado 80302
Project No.: D4195.01-601-50
Report No.: 1
Test Date: 02/20/15
Report Date: 03/09/15
Project Identification: Banner Fort Collins Medical Center
4700 Lady Moon Drive
Fort Collins, Colorado
Project Summary:
Architectural Testing, Inc., a subsidiary of Intertek (Intertek-ATI), was contracted to perform
whole building air leakage testing at the above-referenced project (Appendix A – Photo Nos. 1 –
4).
The building met the performance requirements for whole building air leakage testing (ASTM
E779) included in the project specification section as specified by the City of Fort Collins
ordinance 031 of 2011. Testing indicated that the building performed at an average leakage
rate of 0.11 cfm/ft
2
(cubic feet per minute per square foot) at 75 Pa (Pascals) with an average
air flow leakage of 24,350 cfm (allowable 54,490 cfm).
Background Information:
The Medical Center building is a two-story above-grade structure. The approximate building
enclosure and footprint square footages tested are 217,962 square feet and 75,000 square feet,
respectively, as provided by the architect of record.
The Medical Center’s “Central Utility Plant”, which occupies an attached structure to the east,
was not included in the test specimen area. The attachment to the Central Utility Plant is
provided by way of a single corridor with double fire doors separating the two. The doors were
anchored shut for the test.
130 Derry Court
York, PA 17406
p. 717.764.7700
f. 717.764.4129
www.archtest.com www.intertek.com/building
D4195.01-601-50
Page 2 of 10
Test Methods:
ASTM E779-10, Standard Test Method for Determining Air Leakage by Fan Pressurization.
1
Performance Criteria:
The City of Fort Collins ordinance 031 , 2011 , confirms the air leakage rate of the building does
not exceed 0.25 cfm/ft
2
of building enclosure area at a pressure differential
of 1.57 lb/ft
2
(75
Pa).
Building Preparation (Single Zone):
Upon arrival to the jobsite, Intertek-ATI met with the general contractor and subcontractor
representatives to conduct a walk-though of the building, both interior and exterior, and
confirmed that the building had been prepared by the contractor as coordinated in advance
with Intertek-ATI.
All exterior doors and windows were confirmed as closed and latched and all drain traps were
filled with water or plugged. The doors connecting the main corridors to any portion of the
enclosure, including walls, roofs, and slab-on-grade conditions were propped open to neutralize
pressure differentials. Additionally, all stairway doors were opened and ceiling tiles were
removed to allow pressure neutralization between floors and plenums, respectively. Elevator
doors on each floor were placed in the open position and the cars were parked in the optimum
locations so as to promote air flow between floors allowed by the elevator assembly.
All intake and exhaust louvers and vents were confirmed as sealed on the outside with the
exceptions of MUA -1 and KDF – 1 which were sealed on the inside. The HVAC Excluded
preparation method was utilized (Appendix A – Photo Nos. 5 - 28 and Appendix C - Default
Preparation).
1ASTM E779 is typically utilized with modifications to section 8.9 and 8.10 of the standard as these sections discuss
the induced pressure range (10 Pa to 60 Pa) and what increments (5 Pa to 10 Pa) between induced pressure points
are required for compliance. Through our testing experience, it has been determined that the lower pressures
within the specified range in ASTM E779 are more susceptible to error, due to wind and stack pressure effects that
commonly occur in larger structures. Additionally, project specifications typically include whole building air testing
performance criteria of a measured air leakage rate at a 75 Pa (not 60 Pa) pressure differential. When testing is
limited to higher pressure ranges, induced pressure increments may be less than the increments specified in ASTM
E779. The lowest pressure within the induced pressure range may be constrained by weather conditions where
the highest pressure within the induced pressure range is typically limited by the fan capacity brought to the site.
Ideal weather conditions are difficult to achieve when testing is scheduled weeks in advance. Thus, to achieve the
most accurate data and meet the required performance criteria outlined in the project specification, testing is
generally limited to smaller induced pressure ranges at higher pressures both above and below the required
pressure differential (75 Pa).
D4195.01-601-50
Page 3 of 10
Equipment Setup:
Computer Setup: The test equipment was set up such that two laptop computers were utilized
to perform the whole building air test. One computer was equipped with (Retrotec) FanTestic
Pro 24 software and another computer was equipped with TEC (The Energy Conservatory)
TECLOG 3 software. The computers are identified as the “primary computer” and “secondary
computer”, respectively. See below for the tasks assigned to each computer (Appendix A -
Photo No. 34 and Appendix B - Location Plans).
“Primary computer” – A laptop computer utilizing FanTestic Pro 24 software was set up in
the central reception corridor to monitor and control all Retrotec test equipment. Fan
flows and enclosure pressures at the each elevation were monitored throughout the test.
“Secondary computer” – A laptop computer utilizing TEC (The Energy Conservatory)
TECLOG 3 software and Automated Performance Testing (APT) system was set up to
constantly monitor interior building pressure differentials.
Fan Setup: Ten Retrotec Model 3000SR fans were set up in five separate locations (Appendix A
– Photograph Nos. 29 - 33 and Appendix B - Location Plans). The number of fans set up was
based on the allowable leakage rate to ensure the available cfm achieved the pass/fail criteria
of the enclosure. Retrotec DM32 manometers were used to collect fan flows and control fan
speeds from the “primary” computer. (Appendix B - Location Plans).
Enclosure Pressure Taps: Enclosure pressure taps were run to each primary elevation of the
building at the five locations and connected to DM32 manometers. DM32 manometers were
placed such that the pressure tap tubing utilized to monitor enclosure pressures was limited to
approximately one hundred feet on the exterior of the building to minimize effects of solar
loading on pressure measurements (Appendix B - Location Plans).
Interior Building Pressure Taps: Interior pressure taps were positioned along the interior of the
primary elevations on the second floor and referenced to the central corridor locations of both
the first and second floors. Pressure difference measurements were monitored throughout the
test and compared to enclosure pressure data collected at each elevation (Appendix B -
Location Plans).
D4195.01-601-50
Page 4 of 10
Test Procedure:
ASTM E779 Whole Building Air Leakage Test (Single Zone):
The whole building air leakage test was performed in general conformance with ASTM E779.
Seven Retrotec 3000SR fans were utilized to uniformly pressurize and depressurize the building.
Pressurization and depressurization tests consisted of measuring the total fan air flow (cfm)
required at each of ten equally spaced building pressure differentials. During pressurization the
minimum induced pressure was 46 Pa and the maximum induced pressure was 80 Pa. During
depressurization the minimum induced pressure was -46 Pa and the maximum pressure was -
80 Pa. The test pressure was measured in representative locations such that pressures in the
extremities could be monitored to determine if they were within ±10% of the measured
inside/outside pressure difference. The pressure variation was verified at the highest test
pressure. Enclosure pressures from key elevations of the building and interior building
pressures were compared and used to conduct the analysis of the test results. Baseline
pressure readings were taken across the enclosure and averaged over two minutes each,
before and after the test flow measurements.
TEST RESULTS
Date: 02/20/15
Specimen: Banner Fort Collins Medical Center
Volume: Approx. 2,000,000 cubic feet
Enclosure Area: 217,962 square feet
Enclosed Floor Area: Approx. 125,843 square feet
Elevation: 4,982 feet
Average Height of Building: 32 feet
Test Method: ASTM E779 Whole Building Air Leakage Test (Single Zone)
Pressurization Set:
Time: 8:53 pm to 9:18 pm
Wind Speed: 5-10 mph
Temperature: Initial indoor 65°F Initial outdoor 52°F
Final indoor 63°F Final outdoor 51°F
D4195.01-601-50
Page 5 of 10
Induced Pressure vs. Flow Pressure
Nominal
Building Pressure
(Pa)
Baseline Adjusted
Building Pressure
(Pa)
Nominal
Flow
(cfm)
Adjusted
Flow
(cfm)
% Error
-1.19 - - - -
-46.0 47.1 20300 22400 2.0
-50.0 51.7 20700 22850 -0.2
-54.9 55.5 21400 23620 -0.1
-58.5 58.2 21600 23830 -1.3
-61.0 63.0 22500 24750 -1.0
-65.1 65.6 22900 25280 -0.8
-69.5 71.3 23800 26290 -0.6
-72.4 73.3 24200 26670 -0.4
-76.0 77.0 24900 27460 0.3
-80.0 81.2 26000 28620 2.1
-2.03 - - - -
D4195.01-601-50
Page 6 of 10
Air Leakage
Coefficient,
C
Exponent,
n
Correlation
Coefficient, r2
EQLA1
at 75 Pa
(ft2)
ELA2
at 4Pa
(ft2)
Airflow
at 75 Pa
Air Leakage per Enclosure
Area at 75 Pa, (cfm/ft2)
3719.6 0.45775 0.9897 18.24 12.59 24468
Mean
95% Confidence
Interval
Lower Upper
0.11 0.099 0.121
1. EQLA – Equivalent Leakage Area
2. ELA – Effective Leakage Area
The table below includes key pressure difference measurements verifying pressure variations
within the building did not exceed ±10% of the measured inside/outside pressure difference.
Pressurization at 80 Pa:
Location Pressure Difference (Pa)
Second Floor (NE Elev.) with respect First Floor Central Corridor -3.5Pa
Second Floor (SE Elev.) with respect First Floor Central Corridor -3.5 Pa
Second Floor (SW Elev.) with respect First Floor Central Corridor -2.5 Pa
First Floor (SW Elev.) with respect to First Floor Central Corridor -2.0 Pa
Depressurization Set:
Time: 8:25 pm to 8:39 pm
Wind Speed: 5-10 mph
Temperature: Initial indoor 68°F Initial outdoor 53°F
Final indoor 65°F Final outdoor 52°F
D4195.01-601-50
Page 7 of 10
Induced Pressure vs. Flow Pressure, Depressurize Set
Nominal
Building Pressure
(Pa)
Baseline Adjusted
Building Pressure
(Pa)
Nominal
Flow
(cfm)
Adjusted
Flow
(cfm)
% Error
-1.97 - - - -
-46.0 -47.7 18200 19370 0.3
-50.0 -51.7 19100 20300 0.0
-54.9 -55.4 19900 21130 -0.2
-58.5 -59.3 20800 22070 0.1
-61.0 -62.2 21400 22700 -0.4
-65.1 -66.3 22200 23560 -0.1
-69.5 -70.6 23100 24530 0.2
-72.4 -73.6 23700 25170 0.2
-76.0 -77.4 24700 25850 -0.2
-80.0 -81.3 25100 26700 0.2
-0.65 - - - -
D4195.01-601-50
Page 8 of 10
Air Leakage
Coefficient,
C
Exponent,
n
Correlation
Coefficient, r2
EQLA1
at -75 Pa
(ft2)
ELA2
at -4Pa
(ft2)
Airflow
at -75 Pa
Air Leakage per Enclosure
Area at -75 Pa, (cfm/ft2)
2040.9 0.58693 0.9998 17.5 8.5 24194
Mean
95% Confidence
Interval
Lower Upper
0.11 0.099 0.121
1. EQLA – Equivalent Leakage Area
2. ELA – Effective Leakage Area
The table below includes key pressure difference measurements verifying pressure variations
within the building did not exceed ±10% of the measured inside/outside pressure difference.
Depressurization at -80 Pa.
Location Pressure Difference (Pa)
Second Floor (NE Elev.) with respect First Floor Central Corridor -1.9 Pa
Second Floor (SE Elev.) with respect First Floor Central Corridor -1.9 Pa.
Second Floor (SW Elev.) with respect First Floor Central Corridor -2.3 Pa.
First Floor (SW Elev.) with respect to First Floor Central Corridor -2.1 Pa
Combined Test Data (Pressurization and Depressurization)
Average air flow at 75 Pa (cfm) 24350
Average equivalent leakage area at 75 Pa (ft
2
) 18.12 ft
2
Average effective leakage area at 4 Pa (ft
2
) 10.5 ft
2
Mean
95% Confidence Interval
Lower Upper
Average cfm/ft
2
of enclosure area at 75 Pa (cfm/ ft
2
) 0.11 0.099 0.121
D4195.01-601-50
Page 9 of 10
Conclusion:
The building met the performance requirements for whole building air leakage testing (ASTM
E779) included in the project specification section as specified by the City of Fort Collins
ordinance 031 of 2011. Testing indicated that the building performed at an average leakage
rate of 0.11 cfm/ft
2
(cubic feet per minute per square foot) at 75 Pa (Pascal) with an average air
flow leakage of 24,350 cfm (allowable 54,490 cfm).
Witnesses: The following representatives witnessed all or part of the testing:
Tally Metzger E CUBE, Inc.
Jim Parks JE Dunn Construction
Timothy Sterling RK Mechanical
Dale Stevens Intertek-ATI
Mike Nelson Intertek-ATI
Ethan McKee SPERC Inc.
This report is prepared for the convenience of our customer and endeavors to provide accurate
and timely project information. It contains a summary of observations made by a qualified
representative of Intertek-ATI. It is the exclusive property of the client so named herein and
relates only to the specimen(s) tested.
A copy of this report will be retained by Intertek-ATI for a period of four years from the test
date. Intertek-ATI will service this report for the entire test record retention period. Test
records such as detailed drawings, data sheets, representative sample of test specimens or
other pertinent project documentation will be retained by Intertek-ATI for the entire test
retention period.
For Intertek-ATI:
Dale G. Stevens
Senior Project Manager – Building Sciences
DGS:ldj
Attachments: (This report is complete only when all attachments listed are included.)
Appendix A: Photographs (17 pages)
Appendix B: Location Plans (2 pages)
Appendix C: Default Preparation (2 pages)
D4195.01-601-50
Page 10 of 10
Revision Log
Rev. # Date Page(s) Revision(s)
0 03/09/2015 N/A Original report issue
D4195.01-601-50
APPENDIX A
PHOTOGRAPHS
D4195.01-601-50
Photo No. 1
Building from North West
Photo No. 2
Building from North East
Photo No. 3
Building from South East
Photo No. 4
Building from South West
D4195.01-601-50
Photo No. 5
Sealed Exhausts – LEF-3 and KIT for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 6
Sealed SEF-3 Smoke Relief Vent for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 7
Sealed KEF-2 Kitchen Dishwasher Vent for
“HVAC Excluded” Default Preparation Test Condition (Roof Top)
Photo No. 8
HU-3 Sealed Supply Damper
“HVAC Excluded” Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 9
HU-3 Sealed Exhaust Damper for
“HVAC Excluded” Default Preparation Test Condition (Roof Top)
Photo No. 10
Sealed Exhausts – LEF-6 and LEF-1 for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 11
Sealed Exhausts – LEF-6 and LEF-1 for
“HVAC Excluded” Default Preparation Test Condition (Roof Top)
Photo No. 12
Sealed EF-4 for “HVAC Excluded” Default
Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 13
AHU-2 Sealed Intake Dampers for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 14
AHU-2 Sealed Exhaust Dampers for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 15
Sealed SEF-2 Smoke Relief Vent for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 16
Sealed SEF-1 Smoke Relief Vent for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 17
Sealed MEF-1 Vent for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 18
Sealed EF-1 Vent for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 19
Sealed Exhausts – LEF-3 and LEF-2 for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 20
Sealed Exhausts – EF-3 for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 21
Sealed Exhausts – EF-4 for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 22
AHU-4 Sealed Exhaust Dampers for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 23
AHU-4 Sealed Intake Dampers for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 24
Sealed MUA-1 and KDF -1 Kitchen Hood Fan System (Side 1) for
“HVAC Excluded” Default Preparation Test Condition (Main Floor)
D4195.01-601-50
Photo No. 25
Sealed MUA-1 and KDF -1 Kitchen Hood Fan System (Side 2) for
“HVAC Excluded” Default Preparation Test Condition (Main Floor)
Photo No. 26
AHU-1 Sealed Intake Dampers for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 27
AHU-1 Sealed Exhaust Damper for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
Photo No. 28
Sealed Exhausts – EF-5 for “HVAC Excluded”
Default Preparation Test Condition (Roof Top)
D4195.01-601-50
Photo No. 29
Lower Level ER Entrance
North Elevation Fan Setup at Exit
Photo No. 30
Lower Level Corridor
Inside Corner West Elevation Fan Setup at Exit
D4195.01-601-50
Photo No. 31
Lower Level West Wing
West Elevation Fan Setup at Exit
Photo No. 32
Lower Level Corridor
South Elevation Fan Setup at Exit
D4195.01-601-50
Photo No. 33
Lower Level Corridor
Inside Corner East Elevation Fan Setup at Exit
Photo No. 34
Lower Level Corridor (Adjacent to Courtyard)
Computer System Setup and APT 10% Monitoring System Setups
D4195.01-601-50
APPENDIX B
LOCATION PLANS
D4195.01-601-50
Main Floor Equipment Setup
D4195.01-601-50
2
2
nd
Floor Equipment Setup
D4195.01-601-50
APPENDIX C
DEFAULT PREPARATION
“HVAC EXCLUDED”
D4195.01-601-50
TABLE 1 Default Conditions for Building Preparation
Intentional Openings
Air barrier systems
enclosure test (HVAC-
related openings
excluded)
Operational enclosure
test (air barrier systems
and HVAC-related
openings included)
Doors, hatches and operable windows
inside the test enclosure Open Open
Fire Dampers Remain as found Remain as found
Windows, doors, skylights and hatches
in the bounding enclosure Closed and latched Closed and latched
Windows, doors, hatches and operable
windows in ancillary spaces as
identified in section 10.6.3
Treat in accordance with
10.6.3
Treat in accordance with
10.6.3
Dryer doors and air handler access
panels Closed and latched Closed and latched
Vented combustion appliance Off, unable to fire Off, unable to fire
Pilot light As found As found
Chimney or outlet for vented
combustion device in a separate
mechanical room
As found As found
B-vent or other insulated chimney
serving a vented combustion appliance
located within the test enclosure
Sealed*, ** As found
Solid fuel appliances (fireplaces, wood
burning stoves, pellet stoves)
No fires; dampers
closed; chimney
sealed*, **
No fires; dampers closed
Exhaust, outdoor air, make-up air fans,
air handlers that serve areas inside and
outside the test enclosure
Off Off
Clothes dryers Off Off
Air intake inlet with motorized dampers Dampers closed and
sealed*, ** Dampers closed
D4195.01 – 601 -50
2
Air intake inlet with gravity dampers Sealed*, ** As found
Air intake inlet with no dampers Sealed*, **
Open unless fan(s) serving
inlet is operated >8000
hours per year, then
sealed*, **
Exhaust or relief air outlet with
motorized dampers
Dampers closed and
sealed*, ** Dampers closed
Exhaust or relief air outlet with gravity
dampers Sealed*, ** As found
Exhaust or relief air outlet with no
damper Sealed*, **
Open unless fan serving
outlet is operated >8000
hours per year, then
sealed*, **
Active or passive smoke control
systems - air reliefs and intakes Sealed*, ** As found
Intended powered or non-powered
openings for vented shafts/stairwells Sealed*, ** As found
Waste or linen handling systems and
equipment
Sealed*, **at rooftop
chute vent opening.
Rooftop chute vent – open,
chute intake doors – closed,
chute intake room and
chute discharge room doors
– closed and latched, fire
dampers - left as found
Clothes dryer outlets Sealed*, ** As found; sealed*, ** if
dryers are not yet installed
Exhaust, outdoor air or make-up air fan
that runs >8000 hours per year Sealed*, ** Sealed*, **
Ductwork that serves areas inside and
outside the test enclosure
Sealed*, ** at supply
and return
Sealed*, ** at supply and
return
Floor drains and plumbing Traps filled Traps filled
*Sealed means that an opening has been temporarily masked airtight (e.g. covered with self-
adhering plastic film, taped polyethylene film or rigid board stock).
**If the test result meets the passing criteria for the method used then the building is deemed to
pass even if not all of the HVAC related openings were sealed during the test.