ANSI NFRC 400-2020 pdf free download – Procedure for Determining Fenestration Product Air Leakage An American National Standard
This procedure defines the criteria for testing fenestration air leakage rates to the requirements and guidelines as established by the NFRC. Many of the criteria are referenced from other ASTM standards and ANSI/NFRC 100 [1]. Issues of test pressures, leakage mode, test size, and test temperatures are based on currently acceptable and recognized industry practices for air leakage testing of fenestration. Within this procedure the North American Fenestration Standard/Specification for windows, doors, and skylights (NAFS) [2, 3, 8] or the Florida Building Code Testing Application Standard (TAS) 202 [7] can alternately be used to report product air leakage provided all conditions in Section 4 are met. This procedure is applicable to fixed and operable fenestration products. Air leakage rates for a given fenestration product may vary depending on quality control, environmental factors (temperature, barometric, pressure, humidity, etc.), usage-stresses, operating style differences, long term durability, variable installation methods, and material/design selection. This procedure does not address any of these issues. The air leakage rates obtained from this procedure are intended primarily for product comparison purposes.
3.DEFINITIONs
Reference NFRC 600: Glossary and Terminology [4].
4.TEST CRITERIA
ASTM E283 [5] shall be the only method used to measure product air leakagerates (see Note 1). The following conditions shall apply:
A. The differential static test pressure shall be 75 pascals (1.57 psf),
applied to the test specimen so as to cause the air leakage to occur atthe specimen’s interior side. Any type of chamber may be used;
A differential static pressure of 300 pascals (6.24 psf) shall beacceptable if the North American Fenestration Standards (NAFS)
[References 2,3,8] is used for products obtaining an HC or AW rating.B. The measured air leakage shall be corrected to standard test
conditions per ASTM E283;
c. The rate of air leakage for all window fenestration products shall be
reported as ls-m2(cfm/ft );
D. The specimen test size shall not be less than one of the following:
i. The Model Size per ANSI/NFRC 100,Table 4-3 [1]; or,ii. The NAFS Class R Gateway Size.
Exception: If the largest production size does not meet Section4.D (i) or (ii) then use the standard production size with the leastdeviation from the Model Size as defined in ANSI/NFRC 100,Section 4.6.1
E.Product lines cannot be grouped for air leakage testing;
F. The leakage rate shall be measured to one decimal place in ls-m2 (i.e.,#.#);
G. Operating force shall be measured and recorded per NAFS for all
operable fenestration products. The specimen shall be operated perASTM E283 prior to an air leakage test being performed. No
adjustments shall be made to the specimen between conducting theoperating force and air leakage tests; and
H.Once the test specimen has been received by the laboratory, no
material or component modifications to the product shall be performedby the laboratory without written instructions from the manufacturer.
The laboratory shall report all adjustments and modifications that weremade to the specimen to obtain the reported air leakage rates.
Note 1: This procedure references the use of ASTM E283 asthe only method for measuring individual product air leakagerates. ASTM E283 is a laboratory test method that has beenused for many years to measure air leakage rates undercontrolled conditions. Since the ANSI/NFRC 400 procedure
measures air leakage rates at only one pressure differential, it isbest used to compare the relative performance of fenestration
products. lt does not directly provide information on how aproduct will perform in a specific building application at fieldconditions.ANSI NFRC 400 pdf download.