8.2 Enhanced IAQ Strategies and Low-Emitting Materials
Key Takeaways
- Enhanced IAQ Strategies is worth 1-2 points; Option 1 (mechanical) requires entryway walk-off systems at least 10 ft long, interior cross-contamination prevention, and MERV 13 filters on outdoor and recirculated air.
- Option 2 of Enhanced IAQ adds one strategy from a menu (exterior contamination prevention, increased ventilation, CO2 monitoring beyond prerequisite, or additional filtration MERV 16+ / gas-phase).
- Low-Emitting Materials is worth 1-3 points based on the number of compliant product categories: paints/coatings, adhesives/sealants, flooring, composite wood, ceilings/walls/insulation, and furniture.
- The reference standard for emissions testing is CDPH Standard Method v1.2 (California Section 01350); content limits use SCAQMD Rule 1168 (adhesives/sealants) and Rule 1113 (paints/coatings).
- Each product category requires at least 90% by cost or surface area to meet the emissions standard - one category earns 1 point, three categories earn 3 points.
EQ Credit: Enhanced Indoor Air Quality Strategies (1-2 Points)
Intent: Promote occupants' comfort, well-being, and productivity by improving indoor air quality.
Option 1 - Enhanced IAQ Strategies (1 point)
Implement all of the following strategies that apply to the project's ventilation type.
For mechanically ventilated spaces:
| Strategy | Requirement |
|---|---|
| Entryway systems | Permanent walk-off mats, grilles, or grates at least 10 ft long in the primary direction of travel at every regularly used exterior entrance |
| Interior cross-contamination prevention | Negatively pressurize rooms with hazardous chemicals or pollutants (housekeeping, copy/print, lab spaces) and exhaust at ≥0.50 cfm/sf with no air recirculation |
| Filtration | MERV 13 or higher filters on all outdoor air and recirculated air |
For naturally ventilated spaces: Implement entryway systems plus a natural ventilation design that follows CIBSE AM10 and ASHRAE 62.1-2016 diagrams.
For mixed-mode systems: Implement the mechanically ventilated strategies AND demonstrate that operable windows do not bypass the MERV 13 filters during normal operation.
Option 2 - Additional Enhanced IAQ Strategies (1 additional point)
In addition to Option 1, implement one additional strategy:
- Exterior contamination prevention: Demonstrate that outdoor air meets EPA NAAQS, or filter outdoor air through gas-phase media.
- Increased ventilation: Provide outdoor air rates 30% above ASHRAE 62.1-2016 minimums.
- Carbon dioxide monitoring: Add CO2 sensors in all densely occupied spaces (lowers the prerequisite threshold).
- Additional source control and monitoring: Continuous monitoring of PM2.5 or O3, OR upgrade to MERV 16 filters or carbon-bed gas-phase filtration.
EQ Credit: Low-Emitting Materials (1-3 Points)
Intent: Reduce concentrations of chemical contaminants that can damage indoor air quality, human health, productivity, and the environment.
Product Categories
Products are evaluated by category. Each category counts toward credit achievement once at least 90% of the products (by cost for paints/coatings/adhesives/sealants/composite wood, or by surface area for flooring/ceilings/walls/insulation) meet the applicable emissions and content standard.
| Category | Emissions Standard | Content Standard |
|---|---|---|
| Interior paints & coatings | CDPH Standard Method v1.2 | SCAQMD Rule 1113 VOC limits |
| Adhesives & sealants | CDPH Standard Method v1.2 | SCAQMD Rule 1168 VOC limits |
| Flooring | CDPH Standard Method v1.2 | n/a (Green Label Plus accepted for carpet) |
| Composite wood | California ATCM (no added urea-formaldehyde) | n/a |
| Ceilings, walls, thermal & acoustic insulation | CDPH Standard Method v1.2 | n/a |
| Furniture (if in project scope) | ANSI/BIFMA M7.1 + X7.1 | n/a |
Reference Standards Cheat Sheet
- CDPH Standard Method v1.2 (sometimes called "California Section 01350") is the master emissions chamber test. Products are tested for 35 individual VOCs and total VOC concentration after 14 days.
- SCAQMD Rule 1168 sets VOC content limits for adhesives and sealants (e.g., ≤70 g/L for indoor carpet adhesive, ≤250 g/L for sealants).
- SCAQMD Rule 1113 sets VOC content limits for architectural coatings (≤50 g/L for flat paint, ≤100 g/L for non-flat).
- Green Seal GS-11 (paints) and GS-36 (commercial adhesives) are accepted alternatives.
- Green Label Plus is a carpet-specific emissions program from the Carpet & Rug Institute aligned with CDPH v1.2.
Scoring
| Compliant Categories | Points |
|---|---|
| 3 categories | 1 |
| 5 categories | 2 |
| 7 categories | 3 |
Furniture only counts when it is part of the construction scope; in CI or tenant fit-outs furniture is more common, but BD+C projects often exclude it. Knowing which products fall in which category is heavily tested - composite wood (plywood, MDF, particleboard) is separate from "ceilings/walls/insulation," even though all are interior architectural products.
An architect specifies an interior latex paint with a VOC content of 80 g/L. The paint has been tested under CDPH Standard Method v1.2 and passes. Does it contribute toward the Low-Emitting Materials credit for the paints and coatings category?
A mixed-mode school project plans to claim the Enhanced Indoor Air Quality Strategies credit. Which combination of strategies is required for Option 1 (1 point)?