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Explore this LEED credit
Post your questions on this credit in the forum, and click on the credit language tab to review to the LEED requirements.
Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Do not install any unvented combustion appliances (ovens and ranges excluded). Install a carbon monoxide (CO) monitor on each floor, hard-wired with a battery backup. In multifamily buildings, install a CO monitor on each floor of each unit. For all fireplaces and woodstoves inside the building, provide doors that close or a solid glass enclosure. Interior fireplaces and woodstoves that are not closed-combustion or power-vented must pass BPI or RESNET combustion safety testing protocols to ensure that depressurization of the combustion appliance zone is less than 5 Pa. Space- and water-heating equipment that involves combustion must meet one of the following:
- it must be designed and installed with closed combustion (i.e., sealed supply air and exhaust ducting);
- it must be designed and installed with power-vented exhaust; or
- it must be located in a detached utility building or open-air facility.
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
Do all-electric buildings need to have CO monitors installed?
All projects are required to install carbon monoxide detectors in accordance with this prerequisite, even if no combustion appliances are installed. Occupants might bring in ventless fireplaces or nonelectric space heaters which can emit CO and monitors will alert occupants of exposure.
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
Do not install any unvented combustion appliances (ovens and ranges excluded). Install a carbon monoxide (CO) monitor on each floor, hard-wired with a battery backup. In multifamily buildings, install a CO monitor on each floor of each unit. For all fireplaces and woodstoves inside the building, provide doors that close or a solid glass enclosure. Interior fireplaces and woodstoves that are not closed-combustion or power-vented must pass BPI or RESNET combustion safety testing protocols to ensure that depressurization of the combustion appliance zone is less than 5 Pa. Space- and water-heating equipment that involves combustion must meet one of the following:
- it must be designed and installed with closed combustion (i.e., sealed supply air and exhaust ducting);
- it must be designed and installed with power-vented exhaust; or
- it must be located in a detached utility building or open-air facility.
