nrcan.gc.ca

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Definitions (187)

1

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above grade area


Above grade area is a term applied to any part of a structure or site feature that is above the adjacent finished ground level. Read more about above and below grade areas in Keeping The Heat In - Chapter 6: Basement insulation
Source: nrcan.gc.ca (offline)

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acoustical sealant


A non-hardening synthetic sealant used for sealing joints in polyethylene sheet air/vapour barriers. Read more about above and below grade areas in Keeping The Heat In - Chapter 3: Materials: 3.3.2 Sealants
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ahri certificate of product rating [ahri certified reference number]


The Air Conditioning, Heating and Refrigeration Institute (AHRI) ratings assure consumers energy efficiency claims have been verified by this independent, third-party organization. Read more about the AHRI and search for product ratings and certified reference numbers at the AHRI website.
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air and vapour barrier


An air barrier blocks airflow through the building envelope. It reduces heat loss by preventing air from passing in and out through the envelope and protects the insulation and structure from moisture damage. The air barrier, when located on the exterior, may also act as part of the drainage plane. Standard building materials, such as exterior shea [..]
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air barrier


An air barrier blocks airflow through the building envelope. It reduces heat loss by preventing air from passing in and out through the envelope and protects the insulation and structure from moisture damage. The air barrier, when located on the exterior, may also act as part of the drainage plane. Standard building materials, such as exterior shea [..]
Source: nrcan.gc.ca (offline)

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air changes per hour @ 50 pa


The number of times in an hour that the total volume of air within a room or an entire dwelling is exchanged with air from outside the room or dwelling by either natural or mechanical means.
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air leakage


The uncontrolled flow of air through a building envelope or a component of a building envelope as a result of a pressure difference. Air leakage can occur as infiltration, the uncontrolled movement of outdoor air into a building through intentional and unintentional openings in the building envelope, or as exfiltration, the uncontrolled movement o [..]
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air seal


See Keeping The Heat In - Chapter 4: Comprehensive air leakage control
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air sealed


See Keeping The Heat In - Chapter 4: Comprehensive air leakage control
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air sealing


See Keeping The Heat In - Chapter 4: Comprehensive air leakage control
Source: nrcan.gc.ca (offline)


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