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• ND-0003 · 2023 · Systematic review and meta-analysis

  HighDirect built environment

  Short-term exposure to indoor carbon dioxide and cognitive task performance: A systematic review and meta-analysis

  Authors per journal record. Building and Environment

  Short-term CO2 exposures below 5000 ppm were associated with cognitive effects in the pooled literature, with complex tasks appearing more sensitive.

• ND-0004 · 2012 · Controlled exposure study

  Moderate-highDirect built environment

  Is CO2 an Indoor Pollutant? Direct Effects of Low-to-Moderate CO2 Concentrations on Human Decision-Making Performance

  Satish et al. Environmental Health Perspectives

  Decision-making scores declined at higher CO2 exposures in several domains, with larger effects at 2500 ppm.

• ND-0005 · 2016 · Controlled crossover study

  Moderate-highDirect built environment

  Associations of Cognitive Function Scores with Carbon Dioxide, Ventilation, and Volatile Organic Compound Exposures in Office Workers

  Allen et al. Environmental Health Perspectives

  Cognitive scores were higher under lower-VOC and higher-ventilation conditions than under conventional office conditions.

• ND-0006 · 2017 · Review

  HighDirect built environment

  Ten questions concerning thermal and indoor air quality effects on the performance of office work and schoolwork

  Wargocki & Wyon. Building and Environment

  Synthesizes evidence that temperature and air quality can influence work and school performance, with effects dependent on task and exposure.

• ND-0077 · 2008 · Systematic review

  HighDirect built environment

  A Review of the Research Literature on Evidence-Based Healthcare Design

  Ulrich et al. HERD

  The review found design-relevant evidence across infection control, acoustics, nature/daylight, ergonomics, room type and layout, while quality varied by topic.

• ND-0097 · 2025 · Standard

  NormativeStandard/guideline

  ANSI/ASHRAE Standard 62.1-2025: Ventilation and Acceptable Indoor Air Quality

  ASHRAE. ASHRAE

  Specifies minimum ventilation and IAQ requirements for mechanical and natural ventilation systems.

• ND-0098 · 2025 · Standard

  NormativeStandard/guideline

  ANSI/ASHRAE Standard 62.2-2025: Ventilation and Acceptable Indoor Air Quality in Residential Buildings

  ASHRAE. ASHRAE

  Defines residential ventilation and source-control requirements, including updated filtration provisions.