Showing results 51 - 100 of 248
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Earth tubes buried in the ground can provide pre-cooling of ventilation air or primary cooling if designed deep and long enough
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Ensure that attached garages in multifamily buildings are well-ventilated to reduce the presence of airborne contaminants in the garage and occupied space
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Even when wind is blowing parallel to a wall, an open casement window can create a zone of higher pressure near the window opening, driving airflow into the house
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Exhaust fan installed but in wrong direction causing excessive bend and duct is uninsulated
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Fans supply outdoor air tempered by indoor corridor air to the corridors of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.
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Fire barriers for ventilated wall cavities use thermally activated expansive materials to close off the ventilation space between the wall cladding and the sheathing during a fire while allowing air flow through the metal mesh during normal conditions
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For fireplaces that are not mechanically drafted or direct-vented to outdoors, total net rated exhaust flow of the two largest exhaust fans is .15 CFM per 100 sq. ft. of occupiable space when at full capacity
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Formula 4.2 from ASHRAE 62.2-2010 for fan flow rate required to achieve an effective ventilation rate
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Fresh air intakes and exhaust vents are ducted to each unit in this multifamily building
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Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented
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Having both low and high ventilation openings is necessary to promote airflow from the stack effect
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If integrating an ERV/HRV with the heating/cooling duct system, add dedicated ducts for either the supply or return side to prevent short-circuiting of air distribution
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In hot, dry climates, passive cooling should focus on shading, night flush through cross ventilation and whole-house fans, potentially using high-mass construction
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In this dwelling unit ventilation configuration, a forced air system provides outside air at the same rate as the air being exhausted from the bathroom fan; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake
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In this ventilation configuration for a multifamily building, outside air enters through a dedicated outdoor air system (DOAS), and inside air exits the space through bathroom and kitchen exhaust fans
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In this ventilation configuration, an air handler provides outside air at the same rate as the air being exhausted from a bathroom fan; local kitchen exhaust has a dedicated makeup air intake; dehumidification is provided separately
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Indoor measurement of a whole house mechanical ventilation system with a pressure balancing flowhood provides a sheltered location for measuring airflow
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Inducing airflow through the stack effect requires low inlets and high outlets such as a ridge hood or crown monitor
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Install mesh insect barrier along the tops and bottoms of the rain screen behind the exterior cladding of above-grade walls.
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Jalousie windows use shutters rather than glass over the window openings to allow for maximum ventilation. Screens may be installed to keep out insects.
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Landscape trees and shrubs to funnel cooling breeze towards a home in hot climate zones.
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Locating windows on adjacent and opposite sides of the house will allow cross ventilation regardless of wind direction
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Lower-cost local ERVs are usually installed in a ceiling to supply outdoor air to and exhaust air from the room in which they are located
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Mold on the sheathing in this attic occurred after attic ventilation was increased
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National Fuel Gas Code (NFPA 2012) identifies four categories for combustion furnaces and water heaters based on combustion type (sealed or unsealed) and vent pipe temperature
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Natural ventilation can be wind-driven (cross ventilation) or buoyancy-driven (stack ventilation)
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Opening the outlet on a bath fan reveals model information and provides access to the motor
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Operable windows can provide fresh air to a multifamily building but each unit should also have it’s own fresh air intakes and exhaust vents
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Passive cooling techniques can reduce or eliminate the use of air conditioning and can be used for backup cooling during emergencies.