Vinyl Window Air Infiltration

Test vinyl windows after installation to verify amount of air infiltration and water resistance in accordance with aama 502.

Vinyl window air infiltration.

There is even a formula to quantify it. Astm e283 for air infiltration astm e987 for deglazing. Window air infiltration occurs for one of two reasons. Air leakage is the rate of air movement around a window door or skylight in the presence of a specific pressure difference across it.

This number is determined before installation and in order to keep that number where it s at you must have your windows professionally installed so there are no drafts. Nearly all windows except those that are fixed are susceptible to window air infiltration simply by design. 1 5 times applicable rate for product type and performance class in accordance with aama wdma csa 101 i s 2 a440. Heat loss and gain occur by infiltration through cracks in the window assembly.

Vinyl windows and air infiltration all windows regardless of material or construction will leak a certain amount of air. 1 the window s structural design allows air to leak through it or 2 the window has been poorly installed or maintained. The key is to get a window with such low air infiltration as to make any air penetration insignificant. Allowable air leakage rate.

A small difference of 1 cu ft hr on a day. It s expressed in units of cubic feet per minute per square foot of frame area cfm ft2. The lower the al the less air will pass through cracks in the window assembly. Altitude limits nfrc ratings center of glass performance joining wind load tables and performance grade air infiltration sound transmission ratings for andersen windows and doors.

Harvey vinyl windows have air infiltration ratings ranging from 01 07 cfm sf. Pgt vinyl windows and doors have florida state product approval and have been tested to aama nwwda 101 i s 2 7 specifications. It is indicated by an air leakage rating al expressed as the equivalent cubic feet of air passing through a square foot of window area. Hr times the temperature difference between outside and inside t x 018 btu hr.

Demonstrate compliance with the following. They have also been designed to meet the following test standards. Air leakage also known as air infiltration is the measurement of air that passes through the window assembly itself. A product with a low air leakage rating is tighter than one with a high air leakage rating.