Showing results 1 - 100 of 130
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This central ventilation system uses an energy recovery ventilator to supply air to the corridor and exhaust air from the elevator shaft of a multifamily building
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A central fan-integrated supply system uses a fresh air intake ducted to the home's central furnace or air handler unit to supply fresh air throughout the home
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A Corsi-Rosenthal Box is a highly effective DIY air cleaner made of easy to obtain materials such as HVAC filters, a box fan, cardboard, and tape
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A reversible window fan can operate via thermostatic or remote control and can selectively exhaust air or bring in outdoor air
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A variety of battery-powered fans can be used for a cool room without electric power; most charge off a USB charger so they can be solar charged
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A ventilation controller with a manual override is located on a central air handler fan that is located in an accessible location
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Air flow is produced when central HVAC fan is energized (set thermostat to “fan”)
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Air seal and insulate around the exhaust fan with a rigid foam box
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Air seal around kitchen and bathroom exhaust fans to keep conditioned air from leaking into unconditioned space.
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Allow two to three feet of straight duct run from the fan exhaust port to the first elbow
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An in-line exhaust fan supplements the ability to exhaust moisture-laden air and lint from a dryer
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Bathroom exhaust fans are timer-operated to encourage removal of moisture from the home.
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Calibrated blower door fans are used for envelope leakage testing
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Caulk or foam seal between the exhaust fan housing and the ceiling gypsum; install a gasket or caulk around the exterior exhaust duct vent
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Ceiling fan meets minimum clearance
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Ceiling fans can be used to aid a night flush strategy by helping to cool down wall and floor surfaces more thoroughly at night, and by providing comfort ventilation during the day
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Continuously-operating ventilation & exhaust fans include readily accessible override controls
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Cut a neat hole in the ceiling with smooth edges in which the exhaust fan housing will fit snugly
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Double fan window units can have multiple operational modes; most often outdoor air will be brought in at night when outdoor conditions are cooler
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Ducted whole-house fans should be installed with the duct curved and the fan suspended from rafters to reduce noise and vibration transmission to the living area.
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ENERGY STAR ceiling fans can help occupants feel cool so HVAC air conditioning systems can be turned down for energy savings.
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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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ENERGY STAR-rated ceiling fans and openable windows oriented to prevailing summer breezes help provide low-cost cooling.
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ENERGY STAR-rated ceiling fans save energy when operating and provide cooling movement to reduce the need for coolant-based air conditioning.
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Exhaust fan installed but in wrong direction causing excessive bend and duct is uninsulated
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Exhaust pipe should be made of smooth, rigid duct and any bends should be gradual, not sharp
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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 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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Install the fan either in the range hood, the cabinet above the stove, or on the wall above the stove
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Installing an ENERGY STAR ceiling fan is a low-energy way to improve comfort in a designated cool room
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Intermittent supply and exhaust fans rated at ≤ 3 sones by manufacturer, unless rated flow ≥ 400 CFM
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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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Opening the outlet on a bath fan reveals model information and provides access to the motor
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Rater-measured ventilation rate is within 100-120% of HVAC contractor design value (2.11)
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Right - Each individual unit in this multifamily building has its own energy recovery ventilator (ERV) to provide balanced ventilation to the dwelling
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Right - The kitchen exhaust duct termination is integrated aesthetically and functionally with the exterior cladding; however, the opening should be screened to keep out pests.
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Right - This ceiling-mounted mini whole-house fan has built-in insulated covers to reduce heat loss when the fan is not in use
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Right - This kitchen exhaust duct termination is integrated aesthetically and functionally with the exterior cladding.
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Right - This manufacturer's label shows a CFM higher than the requirement, increasing the likelihood that it will meet the performance level once installed.
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Right – a booster fan was installed in this long dryer duct to increase air flow and help prevent the duct from being clogged with lint
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Right – Fan with a cleanly cut and properly sized hole has been air sealed to drywall
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Right – The exhaust fan duct is sealed to the fan with mastic and the fan opening is covered with cardboard to keep out dust during construction.
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Right – The HVAC unit installed in the insulated attic uses a heat pump to provide heating and cooling while also providing dehumidification and fresh air ventilation.
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Right – This energy recovery ventilator provides fresh air and exhausts stale air through a heat exchanger that recovers heat from the outgoing air in winter and reduces heat from incoming air in the summer to provide ventilation without wasting energy.
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Right – This exhaust fan duct is made of smooth rigid metal and the duct is mastic sealed at the joints.
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Right – This kitchen exhaust duct is made of smooth rigid metal and the duct is mastic sealed at joints
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Right – This kitchen exhaust fan duct is made of smooth round steel duct that takes the shortest, most direct route to the outdoors and joints are sealed with mastic.
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Right – This kitchen exhaust fan has a damper to prevent outside air from entering when the fan is not operating
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Some whole-house fans are equipped with an automatic drop-down cover to provide an air seal at the ceiling level when the fan is not in use
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Some whole-house fans use an automatic insulated cover achieve high R-values when the fan is not in use
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The blower wheel (fan) on this ductless wall-mounted indoor unit has accumulated dust and mold - a common issue for this design.
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The elevator shaft in this multistory multifamily building has an exhaust fan that maintains a slight negative pressure to control odors; there is also a smoke vent that is dampered closed during normal conditions.
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The ENERGY STAR logo on the manufacturer’s label indicates this is an ENERGY STAR qualifying exhaust fan
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The exhaust fan housing may have holes that allow conditioned air to leak into the attic
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The gap around this kitchen exhaust duct represents a significant source of air leakage to the unconditioned attic
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The manufacturer’s label found on this exhaust fan housing shows a sone rating of 1.0
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The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).
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The ventilation controller is next to the thermostat and has a manual override button
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These ERV/HRV configurations are NOT recommended because outdoor air can be sucked back into the ERV/HRV before being distributed to the living space
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This bath exhaust fan ventilation control can be set by the HVAC technician for continuous operation, delayed shut off, or a set amount of minutes each hour
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This central ventilation system uses an energy recovery ventilator, pre-conditioning unit, and elevator shaft exhaust fan to supply air to dwelling units and corridors and to exhaust air from units and the elevator shaft in a multifamily building
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This ducted, wall-mounted range hood exhaust fan replaced a recirculating fan that did not adequately remove kitchen contaminants.
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This energy recovery ventilator (ERV) provides balanced ventilation to a dwelling unit in a multifamily building
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This whole house fan is suspended from rafters and connected to the intake grille by a curved insulated duct, greatly reducing vibration and noise in the occupied space
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This whole-house fan is suspended from rafters and connected to the intake grille by a curved acoustic duct, greatly reducing vibration and noise in the occupied space
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Vent the kitchen fan exhaust directly to the outside, not into an attic, crawlspace, or space between floors
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Wall controls operate the windows and fans allowing homeowners to capture prevailing breezes.
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