to implement entryway systems, properly exhaust chemical use areas,
and employ high efficiency filters on mechanical ventilation
systems to minimize occupant exposure to hazardous particulates and
Install permanent grates, grills, or slotted systems at building
entryways regularly used by building occupants.
Exhaust chemical use areas (garages, laundry, copy rooms,
janitor's closets, pool chemical storage rooms, etc.) and provide
self-closing doors and deck-to-deck partitions.
Install minimum MERV 13 rated filters on all mechanical
- Identify possible pollution sources related to this credit
early in design.
- Confirm early in the mechanical design that the ventilation
system is specified with a minimum MERV 13 filters. Some fan-coil
unit designs cannot accept the pressure-drop and/or filter
- Credit requirements are readily included in the project design
and most codes include requirements for plumbing where chemical use
- Residential or dormitory units with separate, exterior
entrances must have permanent entry mats. However, if the units
share one exterior entrance, only central entry walk-off mats will
- Small, low-volume copiers are not considered pollutant sources
and do not require full height partition walls.
- Copy rooms generating more than 40,000 copies (20,000
double-sided) per month must to be exhausted.
- 48% of all California LEED Certified projects achieved this
credit for LEED v2.1.
Additional EDR Resources
Design Briefs: Indoor Air
Design Briefs: Field
Guidelines: Commissioning Guidelines - Part I