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  1. Air
  2. Air flush

Air flush

Features>Air>13. Air flush

13. Air flush

An air flush is a technique that can help reduce pollutants (such as VOCs and particulate matter) that are inadvertently introduced into indoor environments during construction.

This feature requires an air flush at the completion of construction activities in order to effectively remove pollutants from indoor environments. Given the time required to conduct a flush, emphasis should be placed on the management of construction pollution as the first priority.

Part 1: Air Flush

A building air flush is performed while maintaining an indoor temperature of at least 15 °C [59 °F] and relative humidity below 60%, at one of the following volumes:

a) A total air volume of 4500 m² of outdoor air per m² of floor area [14,000 ft² per ft² of floor area] prior to occupancy.
b) A total air volume of 1000 m² of outdoor air per m² of floor area [3500 ft² per ft² of floor area] prior to occupancy, followed by a second flush of 3500 m² of outdoor air per m² of floor area [10,500 ft² per ft² of floor area] post-occupancy. While the post-occupancy flush is taking place, the ventilation system must provide at least 0.1 m² per minute of outdoor air per m² of floor area [0.3 CFM fresh air per ft² floor area] at all times.
Cardiovascular
Respiratory

Applicability Matrix

Core & Shell New Construction WELL Interiors
Part 1: Air Flush - O O
Commercial Kitchen Education Multifamily Residential Retail
Part 1: Air Flush O P O O

Verification Methods Matrix

Letters of Assurance Annotated Documents On-Site Checks
PART 1 (Protocol)
Air Flush 		Contractor

1

U.S. Green Building Council. LEED v4: Reference Guide for Building Design and Construction. Washington D.C.: U.S. Green Building Council; 2013: 37, 43-44, 542-43, 545, 541-552, 567, 605, 623, 645-53, 658-61, 682, 685-6, 723-4.
13.1.a

USGBC's LEED v4 EQ Credit: Indoor Air Quality Assessment requires performance of a building flush-out by supplying a total air volume of 14,000 cubic feet of outdoor air per square foot of gross floor area.
13.1.b

USGBC's LEED v4 EQ Credit: Indoor Air Quality Assessment requires that the space may be occupied only after delivery of a minimum of 3,500 cubic feet of outdoor air per square foot of gross floor area.
Features>Air>13. Air flush