SUSTAINABLE BUILDINGS

Asset Classes

Focus Area

Indoor Air Quality and Hazards

Topic

Ventilation and Exhaust

Question #

I2.5 – CO Monitoring in Occupied Spaces

Question

Do carbon monoxide (CO) concentrations in occupied spaces adjacent to parking garages, loading docks, and mechanical rooms meet minimum thresholds?

Applicability

All asset classes
Owner/landlord occupied building
Tenant occupied building

Answer & Scoring

  • Yes — CO is tested = 1 point
  • Yes — CO sensors installed = 2 points
  • No = 0 points
  • Not Applicable – There are no occupied spaces adjacent to parking garages, loading docks, and mechanical rooms = 0/0

Max of 2 points

Requirements

    1. Identify occupied spaces that are located adjacent to parking garages, loading docks and mechanical rooms
    2. If IAQ testing data is available, provide representative sampling that:
      • Demonstrates that CO levels are below 5 ppm
      • Is conducted at least annually and captures high traffic periods
    3. If sensors are installed:
      • Demonstrate that concentrations of carbon monoxide are monitored continuously
      • Provide sensor details (electrochemical or metal oxide semi-conductor with a resolution of 1 ppm)
      • Show that sensors are calibrated in accordance with manufacturer’s specifications
      • Confirm that CO levels are below 5 ppm
Note that this question is pertinent to the systems installed prior to and/or during tenancy and must be answered regardless of whether the systems are managed by the tenant.

Documentation

  • Identify occupied spaces potentially exposed to CO

AND

  • IAQ testing results

OR

  • IAQ sensor data

Suggested Lead

In-house, with third-party support

Value

  • Carbon monoxide (CO) is a gas emitted from internal combustion vehicles and fuel-burning mechanical equipment that can present serious health risks to humans
  • CO from parking areas and mechanical rooms can leak into surrounding occupied spaces putting occupants at risk
  • Monitor CO levels in occupied spaces to ensure CO levels stay within a safe range by either testing CO levels annually or installing real-time CO sensors
  • HVAC systems can be adjusted to respond to high CO levels in real-time to maintain a healthy indoor environment

Description

Carbon monoxide emissions from vehicles and improperly vented combustion equipment like boilers and hot water tanks can present a serious health and safety risk. Monitoring carbon monoxide concentrations in occupied spaces adjacent to indoor parking areas and mechanical rooms can help identify exposures before they become a health hazard.

Health Canada has indicated that carbon monoxide concentrations above 5 ppm are indication pf possible emissions and warrant further investigation.

References

Adapted BB 3.0 Question

New in BOMA BEST 4.0