designing the building's ventilation system to meet the minimum
requirements of ASHRAE 62.1-2004, which improves occupant comfort
and enhances indoor air quality.
Design the mechanical ventilation system such that the minimum
requirements of Sections 4 through 7 of ASHRAE 62.1-2004 are
If no mechanical ventilation systems will be provided, the
building must comply with paragraph 5.1 in ASHRAE 62.1-2004.
- Mechanical Engineers or responsible party should confirm the
project can meet the ASHRAE 62.1-2004 requirements as early as
possible in the design phase.
- Ventilation systems may be mechanical or natural. If natural
ventilation and infiltration are being used, compliance can be
demonstrated using a tracer gas test (described in ASHRAE 55-1999).
Otherwise, perform calculations of natural ventilation based on
wind pressure and thermal buoyancy (stack-effect) driven
ventilation as described in the ASHRAE Handbook of Fundamentals,
Chapter 22 or the ASHRAE Standard 62-2001.
- ASHRAE 62.1-2004 combines Standard 62-2001 and published
addenda, thereby providing an easy-to-use consolidated standard.
Standard 62.1-2004 specifies minimum ventilation rates and indoor
air quality that will be acceptable to human occupants and are
intended to minimize the potential for adverse health effects.
Locate outside air intakes at least 25 feet from sources of
- Provide proper drainage for the HVAC condensate pans (prevent
the accumulation of water under, in, or near buildings)
- Recommended to use high efficiency filters at main HVAC
- Recommended to meet operational, maintenance, and
record-keeping requirements of Cal/OSHA
- Minimum IAQ performance is a prerequisite for LEED
certification and must be met.
Additional EDR Resources
Case Studies: High Quality Learning Environment Yields 38 Percent
Studies: Police Facility Goes for LEED Silver
Design Briefs: Indoor Air
Design Briefs: Design
For Your Climate
Design Briefs: Improving Mechanical System Energy
Design Briefs: Underfloor Air Distribution and Access
Design Guidelines: Commissioning Guidelines - Appendix 5