This is a legacy version of the WELL Building Standard. Please check the latest version here.
   
  1. Air
  2. Combustion minimization

Combustion minimization

Features/Air/Feature 24

Combustion minimization

Intent: 

To reduce occupant exposure to combustion-related air pollution from heating and transportation sources.

Post Date: 20 Oct, 2017
Status: Approved

China's GB 6932-2015 Domestic gas instantaneous water heater, Class 5 has been approved for Feature 24 Part 2. It should be noted that the testing protocols in China GB 6932-2015 for humidity and oxygen percentage differ from the requirements in California's South Coast Air Quality Management District rule 1121. However, GB 6932-2015 Domestic gas instantaneous water heater, Class 5 is currently deemed best in class within China.
Post Date: 21 Aug, 2017
Status: Approved

The emission standards of Central Pollution Control Board (Government of India) has been accepted as an alternative for California’s South Coast Air Quality Management District rules for pollution in Feature 24 Part 2. However, combustion equipment for which there are no CPCB emission standards must meet California’s South Coast Air Quality Management District rules for pollution.
The following are acceptable alternatives to the requirements of Feature 24 Part 4

  • Emission standards as per Bharat Stage III for Feature 24 Part 4 a
  • Emission standards as per Bharat Stage III or IV for Feature 24 Part 4 b
Post Date: 07 Apr, 2017
Status: Approved

The following equivalencies have been approved for Feature 24 Part 4:
1. Non-road diesel engine vehicles - Euro Stage IIIA, US Tier 3 and 2, Japan MoE standards.
2. On road diesel engine vehicles - Euro V (2012) standard.
It should be noted that Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V (2012) standard's allowable emission levels exceed those required in US Tier 4 and US EPA 2007. However, Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V are currently deemed best in class within Hong Kong at this time.
It should be noted that Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V (2012) standard's allowable emission levels exceed those required in US Tier 4 and US EPA 2007. However, Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V are currently deemed best in class within Hong Kong at this time.
Post Date: 20 Mar, 2017
Status: Approved

The following European local emission standards have been approved as an acceptable equivalent for Feature 24, Part 4:
1. European Stage IV standard for non-road diesel engine vehicles or the use of non-road diesel engine vehicles equipped with diesel particulate filters (DPF).
2. Euro VI emission standards for on-road engine vehicles or the use of on-road diesel engine vehicles equipped with diesel particulate filters (DPF).
Post Date: 17 Jan, 2017
Status: Approved

The following China local standards have been approved as an acceptable alternative for F24, Part 4:
1. China local standard GB20891-2014 for non-road diesel engine vehicles
2. China local standard GB17691-2005 for passenger vehicles and heavy duty trucks
Note that that NOx limits in the China standards are higher then US EPA limits.