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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.