SUSTAINABLE BUILDINGS
Asset Classes
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Offices
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- Not applicable
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Enclosed Shopping Centres
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- Not applicable
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Open Air Retail
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- Not applicable
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- Not applicable
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Light Industrial
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- Not applicable
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Multi-Unit Residential Buildings
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- Not applicable
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- Not applicable
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Health Care Facilities
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- Not applicable
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- Not applicable
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Universal
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- Not applicable
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Focus Area
Indoor Air Quality and Hazards
Topic
Ventilation and Exhaust
Question #
I2.1b – Owner or landlord informs, Tenant maintains Outdoor Air
Question
Do the measured Outdoor Air (OA) ventilation rates in tenant-controlled areas meet minimum carbon dioxide (CO2) thresholds?
Applicability
All asset classes
Tenant occupied building – some or all systems managed by the tenant
Answer & Scoring
- Yes = 3 points
- No= 0 points
- Not applicable – Owner/landlord occupied building OR Tenant occupied building: All systems managed by the owner/landlord OR Tenant occupied building: Owner does not have access to tenant-controlled areas = 0/0
Max of 3 points
Requirements
-
- Demonstrate CO2 concentrations below 800 ppm:
- Refer to most recent IAQ Assessment Report and highlight section showing CO2 concentrations measured below 800 ppm in tenant-controlled spaces
- The assessment must have been completed within the last year Measurements taken with CO2 handheld devices are admissible if devices meet the following criteria: Handheld non-dispersive infrared devices with a range of 0 to 5,000 ppm and resolution of 1 ppm
OR
- Demonstrate CO2 concentrations below 800 ppm:
- Documentation demonstrating that the building owner/landlord’s does not have access to the tenant-controlled areas (e.g. lease agreement)
-
OR
- Signed letter from owner/landlord or tenant indicating how and why the owner is restricted from the space.
Documentation
- Table showing CO2 concentrations measured below 800 ppm
OR
- Documentation demonstrating that the building owner/landlord’s does not have access to the tenant managed HVAC systems (e.g. lease agreement)
OR
- Signed letter from owner/landlord or tenant indicating how and why the owner is restricted from the space.
Suggested Lead
In-house, with third-party support
Value
- Excessive carbon dioxide (CO2) in a building can cause adverse health effects. CO2 levels should be kept under the recommended level of 800 ppm to prevent negative impacts on building occupants
- Ventilate indoor spaces with an adequate amount of outdoor air to manage CO2 levels and indoor air contaminants
- Engage qualified professionals to perform indoor air testing in tenant-controlled areas to confirm that CO2concentrations in compliance
- Alternatively, install sensors in tenant spaces to monitor CO2 levels and confirm they are below the recommended level
Description
Where tenants manage IAQ, owner or landlords should be aware of operations and maintenance practices within tenant spaces to check that tenant practices are not negatively impacting adjacent or base building components that are the owner or landlord’s responsibility.
Inadequate ventilation is one of the major sources of IAQ complaints and an indicator that the HVAC system may not be functioning optimally. Odorous or dusty operations in tenant spaces have the potential to impact adjacent tenants if the contaminants are not properly controlled. The owner or landlord should ensure any high-risk tenants are diligent with their processes so adjacent tenants are not adversely impacted.
References
Adapted BB 3.0 Question
New in BOMA BEST 4.0