LEEDuser’s viewpoint
Frank advice from LEED experts
LEED is changing all the time, and every project is unique. Even seasoned professionals can miss a critical detail and lose a credit or even a prerequisite at the last minute. Our expert advice guides our LEEDuser Premium members and saves you valuable time.
Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
OPTION 1
Locate tenant space in a building that prohibits smoking by all occupants and users within 25 feet (8 meters) of entries,outdoor air intakes, and operable windows. Prohibit on-property smoking within 25 feet (8 meters) of entries, outdoor air intakes, and operable windows. Provide signage to allow smoking in designated areas, prohibit smoking in designated areas, or prohibit smoking on the entire property. If the 25-foot (8 meter) requirement cannot be followed due to code or landlord rules, provide documentation that proves such regulations are in place. If outdoor space, public or private, is used for business purposes, regardless of zero lot line, this space needs to follow the no-smoking regulation outlined in this credit. Examples of such spaces include sidewalk seating, patios or decks, and/or stands for purchasing goods whereas smoking must be prohibited within 25 feet (8 meters) of such spaces.OR
Option 2CASE 1. Non-residential projects
Confirm that smoking is prohibited in the portions of the tenant space not designated as a smoking space, all other building areas served by the same HVAC system, and the common areas used by occupants. Ensure that ETS cannot migrate by either mechanical or natural ventilation from other areas of the building.If the occupants are permitted to smoke, provide one or more designated smoking rooms designed to contain, capture and remove ETS from the building. At a minimum, each smoking room must be directly exhausted to the outdoors, with no recirculation of ETS-containing air to nonsmoking areas, enclosed with impermeable deck-to-deck partitions, and operated at a negative pressure compared with surrounding spaces of at least an average of 5 Pa (0.02 inches of water gauge) and with a minimum of 1 Pa (0.004 inches of water gauge) when the doors to the smoking rooms are closed.Verify performance of the smoking rooms’ 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 of transport of air from the smoking rooms (with closed doors) to adjacent spaces.Case 2. Multi-Unit residential buildings
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 vertical chases adjacent to the units. Weather-strip all doors in the residential units leading to common hallways to minimize air leakage into the hallway1. Demonstrate acceptable sealing of residential units by conducting a blower door test in accordance with ANSI/ASTM–779–99, 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. [Europe ACP: Blower Door] Use the progressive sampling methodology defined in Chapter 7 (Home Energy Rating Systems [HERS] Required Verification and Diagnostic Testing) of the California Low Rise Residential Alternative Calculation Method Approval Manual, found at http://www.energy.ca.gov/title24_1998_standards/residential_acm/CHAPTER0.... 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 per 10 square meters) of enclosure area (i.e., sum of all wall, ceiling, and floor areas).Alternative Compliance Paths (ACPs)
Europe ACP: ANSI/ASTM-E779-03
Projects in Europe may use CEN Standard EN 13829:2002 Thermal Performance of buildings – Determination of air permeability of buildings – Fan pressurization method.[view:embed_resource=page_1=4887984] See all forum discussions about this credit »What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
See all forum discussions about this credit »Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
Get the inside scoop
Our editors have written a detailed analysis of nearly every LEED credit, and LEEDuser premium members get full access. We’ll tell you whether the credit is easy to accomplish or better left alone, and we provide insider tips on how to document it successfully.
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
OPTION 1
Locate tenant space in a building that prohibits smoking by all occupants and users within 25 feet (8 meters) of entries,outdoor air intakes, and operable windows. Prohibit on-property smoking within 25 feet (8 meters) of entries, outdoor air intakes, and operable windows. Provide signage to allow smoking in designated areas, prohibit smoking in designated areas, or prohibit smoking on the entire property. If the 25-foot (8 meter) requirement cannot be followed due to code or landlord rules, provide documentation that proves such regulations are in place. If outdoor space, public or private, is used for business purposes, regardless of zero lot line, this space needs to follow the no-smoking regulation outlined in this credit. Examples of such spaces include sidewalk seating, patios or decks, and/or stands for purchasing goods whereas smoking must be prohibited within 25 feet (8 meters) of such spaces.OR
Option 2