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SUSTAINABLE BUILDINGS

Asset Classes

Focus Area

Indoor Air Quality and Hazards

Topic

Ventilation and Exhaust

Question #

I2.1a – Owner or landlord maintains Outdoor Air

Question

Do measured Outdoor Air (OA) ventilation rates in landlord-controlled areas meet minimum carbon dioxide (CO2), ASHRAE 62.1 or ASHRAE 62.2 thresholds?

Applicability

Applicable to Office, Healthcare, Enclosed Shopping Centre, Universal and Multi-Unit Residential buildings

Answer

Select one of the following:
  • Yes — CO2 concentrations below 800ppm
  • Yes — OA rates meet ASHRAE 62.1 Table 6.2.2.1 minimum requirements
  • No

Description

Maintaining adequate ventilation and thermal comfort within the built environment is important for occupant health and safety, comfort, and productivity.

Inadequate ventilation is one of the major sources of IAQ complaints and also an indicator that the HVAC system may not be functioning optimally.

Requirements

a. Demonstrate CO2 concentrations below 800ppm:

    • Refer to most recent IAQ Assessment Report and highlight section showing CO2 concentrations measured below 800ppm in owner or landlord-controlled spaces
    • The assessment must have been completed within the last year

b. Demonstrate ASHRAE 62.1 Table 6.2.2.1 minimum Requirements are met:

    • Determine the average ventilation rate for frequently occupied indoor spaces through on-site measurement of actual outdoor and supply air through the use of a certified air balancing contractor or equivalent
    • The assessment must have been completed within the last five years, or as major renovations of the HVAC systems occur

Documentation

  • Table showing CO2 concentrations measured below 800ppm
  • Table comparing calculated and measured based on ASHRAE 62.1 Table 6.2.2.1 ventilation rates

Adapted BB3 Question

Question 03.04.04 — Do measured outdoor air ventilation rates meet the minimum requirements of Table 6.2.2.1 of the current ASHRAE 62.1 Standard?

Suggested Lead

In-house, with third-party support

References

Crosswalk

TBD

Other Notes

None

Scoring

2 and / or 5 Points

Verification