ASTM E 779 Standard Test Method for Determining Air Leakage Rate by Fan Pressurization
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ASTM E 779 Document Information:
Title
Standard Test Method for Determining Air Leakage Rate by Fan Pressurization
ASTM International
Publication Date:
Oct 1, 2003
Scope:
This test method covers a standardized technique for measuring
air-leakage rates through a building
envelope under controlled pressurization and de-pressurization.
This test method is applicable to small temperature differentials and
low-wind pressure conditions.
For tests conducted in the field, it must be recognized that field
conditions may be less than
ideal. Nevertheless, strong winds and large indoor-outdoor temperature
differentials should be
avoided.
This test method is intended to produce a measure of air tightness of
a building envelope. This
test method does not measure air leakage rates under normal conditions
of weather and building
operation. To measure air-change rate directly, use the tracer gas
dilution method (see Test Method
E 741).
This test method is intended for the measurement of the airtightness
of building envelopes of
single-zone buildings. For the purpose of this test method, many
multi-zone buildings can be
treated as single-zone buildings by opening interior doors or by
inducing equal pressures in
adjacent zones.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. For
specific hazard statements see Section 7.
Keywords:
- air leakage
- air-leakage rates
- blower-door test
- building envelope
- depressurization
- energy conservation
- fan pressurization testing
- infiltration
- pressurization
- ventilation
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