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Building Envelope - Air Infiltration Reduction & Garage Door <br />Replacement <br />Air leakage is defined as the "uncontrolled migration of <br />conditioned air through the building envelope ", caused by <br />pressure differences due to wind, chimney (or stack) effect <br />and mechanical systems. Air Leakage has been shown to <br />represent a substantial source of heat loss or gain through <br />the building envelope. Tests carried out by the National <br />Research Council of Canada on High Rise Commercial <br />and Residential Buildings, Schools, Supermarkets and <br />Houses have shown levels of 30 -50% of heat loss could be <br />attributed to air leakage. <br />Johnson 00 <br />Controls <br />Beyond the potential for energy savings, uncontrolled air f <br />leakage can affect the thermal comfort of occupants, air <br />quality through the imbalance of mechanical systems and <br />the structural integrity of the building envelope through moisture migration. Controlling air leakage <br />involves the sealing of gaps, cracks and holes using appropriate materials and systems to create, if <br />possible, a continuous plane of "air- tightness" to completely encompass the building envelope. Part <br />of this process also incorporates the need to "decouple" floor -to -floor and to "compartmentalize" <br />components of the building in order to equalize pressure <br />differences. <br />The Fire Station has a large amount of single pane windows on <br />the garage doors of the truck bays. Single pane windows are <br />very inefficient. The present window layout allows the public <br />to see the trucks, but these single pane windows cause a high <br />amount of heat loss in the winter and a lot of heat gain in the <br />summer. Our solution is to remove some of this glass, but to <br />still allow sight of the trucks by the general public. <br />BIM# <br />Building Envelope - Air Infiltration Reduction <br />CH3 <br />City Hall <br />• Weather stripping around main doors. <br />Fire Station <br />FS3 <br />FS8 <br />• Caulking and weather stripping around windows <br />• Garage Door Window reduction. <br />Risks of not implementing the recommendations <br />Complaints of drafts from occupants. <br />Poor comfort conditions. <br />Benefits <br />• tceaucea energy consumption <br />• Help reduce drafts in the spaces and increases the comfort of the occupants. <br />• Still allows viewing of the fire tn,ckR by the _ .u_ <br />Page 15 City of St. Anthony Village <br />Performance Contract Analysis <br />NOT TO BE REPRODUCED OR DISTRIBUTED WTHOUT JOHNSON CONTROLS' PERMISSION <br />