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Evaluate Building Envelope for Energy Efficiency
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Conversion Technology, Inc. (CTI) conducts various tests to evaluate the building envelope for energy efficiency. These tests are described below:
- Test Method for Determining Air Leakage Rate by Fan Pressurization for Air Leakage - ASTM Practice E779-03 (2003)
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- Standard Test Methods for Determining Air Tightness of Buildings Using an Orifice Blower Door - E1827-96 (2002)
CTI conducts testing to evaluate the performance of the building envelope for air leakage according to ASTM Practice E779-03 (2003) Test Method for Determining Air Leakage Rate by Fan Pressurization for Air Leakage. Before each test, fan calibration is conducted per ASTM E1258-88 (2003) Test Method for Airflow Calibration of Fan Pressurization Devices. Field tests are conducted on days of low-wind pressure conditions to minimize error associated with non-laboratory conditions. Each multi-zone building is divided into numerous and convenient smaller single-zones by opening or sealing interior doors/openings or by inducing equal pressures in adjacent zones. CTI, where practical, calibrates facility makeup air fan(s) for testing the entire facility as a single zone.
The orifice blower door tests are performed via E1827-96 (2002) Standard Test Methods for Determining Air Tightness of Buildings Using an Orifice Blower Door by inducing pressure differences across the building envelope and measuring those pressure differences and the resulting airflows. Pressure differentials are typically maintained at 0.3” w.g. (75Pa) and it is expected that air leakage rates will be on the order of 0.25 scfm/ft2. The measurements of pressure differences and airflows are used to determine air tightness and other leakage characteristics of the buildings envelope. Testing is recommended to occur during minimal building traffic to optimize the integrity of the results.
- Thermal Leakage Options/Services - ISO6781:1983 and ASTM C1060-90 (1997)
Thermal leakage is also performed using digital thermal camera technology to identify “hot”/”cold” spots in building envelope. Special attention is focused on envelope piping penetrations, weather stripping, electrical conduit and facility egress and glazing openings. Camera thermal accuracy is maintained down to 0.1 °C or better. Testing, data analysis and reporting procedures are in accordance to ISO 6781:1983 and ASTM C1060-90 (1997)
© Copyright 2008, Conversion Technology Inc. (Disclaimer)
2190 N. Norcross Tucker Road #202, Norcross, GA 30071 - 770-263-6330
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