Showing results 151 - 200 of 578
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Electronically controlled dampers allow this central air system to provide zoned heating and cooling to specific parts of the home.
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ENERGY STAR requires exhaust fans set for intermittent operation to have a sound rating of ≤ 3 sones and exhaust fans set for continual operation to have a sound rating of ≤ 1 sone.
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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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Evaporative Cooler Sizing in ACH based on wet-bulb temperatures at 1% summer design conditions
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Example expanded performance table from a 1.5-ton air conditioner
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Example of an HVAC installer’s balancing report form
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Exhaust fan installed but in wrong direction causing excessive bend and duct is uninsulated
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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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Fan housing was oriented in the correct direction to allow proper exhaust duct installation
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Fans from seperate dwellings exhausted together without back-draft dampers and not sealed
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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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Fiberglass mesh tape is installed around a duct boot in preparation for air sealing with mastic
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Filter access panel includes gasket or comparable sealing mechanism and fits snugly against the exposed edge of filter when closed to prevent bypass
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Filter located and installed so as to facilitate access and regular service by the owner
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Flexible ducts in unconditioned space not installed in cavities smaller than outer duct diameter; in conditioned space not installed in cavities smaller than inner duct diameter
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Flexible ducts supported at intervals as recommended by mfr. but at a distance ≤ 5 ft
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For better temperature distribution and air quality, every bedroom and all of the common spaces in this home have ducted returns to the central heat pump and all bathroom exhaust fans are controlled by a condensation sensor and timer switch.
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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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Function of ventilation controls is obvious (e.g., bathroom exhaust fan) or, if not, controls have been labeled
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Furnace filter resistance varies by surface area; deeper pleats add surface area
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Furnace filters that are MERV 6 or higher protect the HVAC equipment and improve indoor air quality
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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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Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools
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Heated air flow is produced when the heating cycle is energized (set thermostat to “heat”)