To prevent or minimize exposure of building occupants, indoor surfaces and ventilation air distribution systems to environmental tobacco smoke (ETS).
- Prohibit smoking in the building.
- Prohibit on-property smoking within 25 feet (8 meters) of entries, outdoor air intakes and operable windows.
CASE 1. Non-Residential Projects
- Prohibit smoking in the building except in designated smoking rooms and establish negative pressure in the rooms with smoking.
- Prohibit on-property smoking within 25 feet (8 meters) of building entries, outdoor air intakes and operable windows.
- Locate designated smoking room(s) to effectively contain, capture and remove ETS from the building. At a minimum, the smoking room must be directly exhausted to the outdoors, away from air intakes and building entry paths, away from air intakes and building entry paths, with no recirculation of ETS containing air to the nonsmoking area of the building; enclosed with impermeable deck-to-deck partitions. The smoking room must be operated at a negative pressure (compared with the surrounding spaces) of at least an average of 5 Pascals (Pa) (0.02 inch water gauge) and a minimum of 1 Pa (0.004 inch water gauge) when the doors to the rooms are closed.
- Verify performance of the smoking room differential air pressures by conducting 15 minutes of measurement, with a minimum of 1 measurement every 10 seconds, of the differential pressure in the smoking room with respect to each adjacent area and in each adjacent vertical chase with the doors to the smoking room closed. Conduct the testing with each space configured for worst-case conditions for transport of air from the smoking room (with closed doors) to adjacent spaces.
- Reduce air leakage between smoking and nonsmoking areas.
- Prohibit smoking in all common areas of the building.
- Prohibit on-property smoking within 25 feet (8 meters) of building entries, outdoor air intakes and operable windows opening to common areas.
- Minimize uncontrolled pathways for ETS transfer between individual residential units by sealing penetrations in walls, ceilings and floors in the residential units and by sealing adjacent vertical chases adjacent to the units.
- Weather-strip all doors in the residential units leading to common hallways to minimize air leakage into the
- Demonstrate acceptable sealing of residential units by a blower door test conducted in accordance with ASTM-779-03, Standard Test Method for Determining Air Leakage Rate by Fan Pressurization. Projects outside the U.S. may use a local equivalent to ANSI/ASTM-E779-03, Standard Test Method for Determining Air Leakage Rate By Fan Pressurization.
- Use the progressive sampling methodology defined in Chapter 7 (Home Energy Rating Systems, HERS Required Verification and Diagnostic Testing) of the California Residential Alternative Calculation Method Approval Manual. Projects outside the U.S. may use a local sampling methodology, whichever is more stringent. Residential units must demonstrate less than 1.25 square inches of leakage area per 100 square feet (8 square centimeters of leakage area per 10 square meters) of enclosure area (i.e., the sum of all wall, ceiling and floor areas).
CASE 2. Residential and Hospitality Projects
1If the common hallways are pressurized with respect to the residential units then doors in the residential units leading to the common hallways need not be weatherstripped provided that the positive differential pressure is demonstrated as in Option 2, Case 1 above, considering the residential unit as the smoking room.
Credit substitution available
You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.
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