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© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Case 1. Single Family
Option 1. Exhaust Fan in Garage (1 point)
Install in the garage an exhaust fan that is rated at least 75 cfm (35 liters per second) and meets ENERGY STAR cfm/w performance requirements. The fan must vent directly to the outdoors and have an automatic timer control linked to an occupant sensor, a light switch, a garage door opening-closing mechanism, a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm, or equivalent. The timer must be set to provide at least three air changes each time the fan is turned on. Projects that earn the EPA Indoor airPLUS label automatically meet the requirements of Option 1.OR
Option 2. No Garage, or Detached Garage, or Carport (2 points)
Select one of the following strategies:- Do not construct a garage.
- Install a detached garage, defined as a structure that does not share a wall with the home.
- Install a carport, defined as an open-air space with one complete wall, which may be shared with the home.
Case 2. Multifamily
Option 1. Exhaust Fan in Multicar Garage (1 point)
For a garage that accommodates more than three cars, follow the requirements in ASHRAE 62.1–2010. Exhaust the garage sufficiently to create negative pressure with respect to adjacent spaces with the doors to the garage closed. Provide self-closing doors and deck-to-deck partitions or a hard lid ceiling. The pressure differential with the surrounding spaces must be at least 5 Pascals (Pa) (0.02 inches of water gauge) when all doors are closed. The exhaust fan may either run continuously, or on a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm.OR
Option 2. Exhaust Fan in Small Garage (1 point)
For a garage that accommodates one, two, or three cars, install an exhaust fan that meets ENERGY STAR minimum efficacy levels (cfm/W); direct-exhaust fans must be 100 cfm (47 liters per second) or greater, and ducted exhaust fans must be 130 cfm (61 liters per second) or greater. The fan must either run continuously or have an automatic timer control linked to an occupant sensor, a light switch, a garage door opening-closing mechanism, a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm, or equivalent. Any timer must be set to provide at least three air changes each time the fan is turned on.Option 3. No Garage, or Detached Garage (2 points)
Select one of the following strategies:- Do not construct a garage.
- Install a detached garage, defined as a structure that does not share a wall with the building.
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 »Addenda
Which LEED v4 Homes credit and prerequisite requirements can be automatically met by the EPA Indoor airPLUS program?
Projects that earn the EPA Indoor airPLUS label, based on Indoor airPLUS Version 1 (Rev 03) Construction Specifications automatically meet the requirements of the following prerequisites and credits:
EQ prerequisite Ventilation;
EQ prerequisite Combustion venting;
EQ prerequisite Garage pollutant protection;
EQ prerequisite Radon-resistant construction;
EQ prerequisite Air filtering;
EQ prerequisite Environmental tobacco smoke;
EQ credit Contaminant control, Option 3. Preoccupancy Flush (0.5 points);
EQ credit Enhanced combustion venting, Option 2. Enhanced combustion venting measures (1 point);
EQ credit Enhanced garage pollutant protection, Case 1. Single Family, Option 1. Exhaust Fan in Garage (1 point)
MR credit Durability management verification (1 point)
SS credit Nontoxic pest control (1 point) , measure: Seal all external cracks, joints, penetrations, edges, and entry points with appropriate caulking. Install rodent- and corrosion-proof screens (e.g., copper or stainless steel mesh) on all openings greater than ¼ inch (6 millimeters), except where code prohibits their installation (e.g., dryer vents), and measure: Design discharge points for rain gutters, air-conditioning condensation lines, steam vent lines, or any other moisture source such that discharge is at least 24 inches (600 millimeters) from the foundation.
In addition, project teams are eligible for an Innovation credit for additional moisture control items covered in Indoor airPLUS and not directly awarded in LEEDv4
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.
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Case 1. Single Family
Option 1. Exhaust Fan in Garage (1 point)
Install in the garage an exhaust fan that is rated at least 75 cfm (35 liters per second) and meets ENERGY STAR cfm/w performance requirements. The fan must vent directly to the outdoors and have an automatic timer control linked to an occupant sensor, a light switch, a garage door opening-closing mechanism, a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm, or equivalent. The timer must be set to provide at least three air changes each time the fan is turned on. Projects that earn the EPA Indoor airPLUS label automatically meet the requirements of Option 1.OR
Option 2. No Garage, or Detached Garage, or Carport (2 points)
Select one of the following strategies:- Do not construct a garage.
- Install a detached garage, defined as a structure that does not share a wall with the home.
- Install a carport, defined as an open-air space with one complete wall, which may be shared with the home.
Case 2. Multifamily
Option 1. Exhaust Fan in Multicar Garage (1 point)
For a garage that accommodates more than three cars, follow the requirements in ASHRAE 62.1–2010. Exhaust the garage sufficiently to create negative pressure with respect to adjacent spaces with the doors to the garage closed. Provide self-closing doors and deck-to-deck partitions or a hard lid ceiling. The pressure differential with the surrounding spaces must be at least 5 Pascals (Pa) (0.02 inches of water gauge) when all doors are closed. The exhaust fan may either run continuously, or on a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm.OR
Option 2. Exhaust Fan in Small Garage (1 point)
For a garage that accommodates one, two, or three cars, install an exhaust fan that meets ENERGY STAR minimum efficacy levels (cfm/W); direct-exhaust fans must be 100 cfm (47 liters per second) or greater, and ducted exhaust fans must be 130 cfm (61 liters per second) or greater. The fan must either run continuously or have an automatic timer control linked to an occupant sensor, a light switch, a garage door opening-closing mechanism, a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm, or equivalent. Any timer must be set to provide at least three air changes each time the fan is turned on.Option 3. No Garage, or Detached Garage (2 points)
Select one of the following strategies:- Do not construct a garage.
- Install a detached garage, defined as a structure that does not share a wall with the building.
