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Vacuum is used to clean a reusable air filter for a ductless heat pump

Vacuum is used to clean a reusable air filter for a ductless heat pump
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Vapor retarder already applied to the floor of the crawlspace and wrapping up the interior perimeter walls, lapped and sealed at the seams

Vapor retarder already applied to the floor of the crawlspace and wrapping up the interior perimeter walls, lapped and sealed at the seams
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Vapor-permeable mineral wool insulation is installed on the exterior side of the sill beam during an exterior wall retrofit to allow the sill beam to dry to the outside

Vapor-permeable mineral wool insulation is installed on the exterior side of the sill beam during an exterior wall retrofit to allow the sill beam to dry to the outside
Presentation:

Variable Capacity Comfort Systems and Smart Ventilation Systems in High-Performance Homes

Variable Capacity Comfort Systems and Smart Ventilation Systems in High-Performance Homes
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Variable-speed pool pumps can cut energy use by 50% to 90% compared to standard single-speed pumps

Variable-speed pool pumps can cut energy use by 50% to 90% compared to standard single-speed pumps
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Variable-speed pump with low head loss filter and piping layout

Variable-speed pump with low head loss filter and piping layout
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Variation of maximum negative main wind force resisting system (MWFRS) pressures based on envelope procedures for low-rise buildings.

Variation of maximum negative main wind force resisting system (MWFRS) pressures based on envelope procedures for low-rise buildings.
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Vegetated swales help to control storm water runoff and can filter out pollutants.

Vegetated swales help to control storm water runoff and can filter out pollutants.
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Vegetated swales, pervious pavers, pocket parks, and retention of existing trees all help to minimize runoff and lessen impacts on municipal sewer systems.

Vegetated swales, pervious pavers, pocket parks, and retention of existing trees all help to minimize runoff and lessen impacts on municipal sewer systems.
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Vegetation types are grouped by water usage in a technique known as hydrozoning to reduce overall water consumption.

Vegetation types are grouped by water usage in a technique known as hydrozoning to reduce overall water consumption.
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Velocity measurement locations for round and rectangular ducts; velocity measurements should be taken at several locations representative of equal sectional areas across the duct cross-sectional area

Velocity measurement locations for round and rectangular ducts; velocity measurements should be taken at several locations representative of equal sectional areas across the duct cross-sectional area
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Vent the kitchen fan exhaust directly to the outside, not into an attic, crawlspace, or space between floors

Vent the kitchen fan exhaust directly to the outside, not into an attic, crawlspace, or space between floors
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Vented Attic vs Unvented Cathedral Attic Air Flow

Vented Attic vs Unvented Cathedral Attic Air Flow
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Vented crawl space with concrete walls and insulated ceiling

Vented crawl space with concrete walls and insulated ceiling
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Vented crawl space with insulation in the ceiling

Vented crawl space with insulation in the ceiling
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Vented crawlspace cripple wall has seismic retrofits – plywood is added on interior that fastens to extra blocking added at sill plate and connected to foundation with new anchor bolts

Vented crawlspace cripple wall has seismic retrofits – plywood is added on interior that fastens to extra blocking added at sill plate and connected to foundation with new anchor bolts
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Vented crawlspace foundation insulated at floor joist with rigid foam.

Vented crawlspace foundation insulated at floor joist with rigid foam.
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Vented crawlspace foundation insulated under floor joists with rigid foam.

Vented crawlspace foundation insulated under floor joists with rigid foam.
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Vented range hoods send air through a duct to the outside and recirculating (or ductless) range hoods send air through a charcoal filter and reintroduce cooking air back into the home.

Vented range hoods send air through a duct to the outside and recirculating (or ductless) range hoods send air through a charcoal filter and reintroduce cooking air back into the home.
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Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition

Vented roof assembly at eave retrofitted with rigid foam, spray foam, and fully adhered membrane to air seal the top of wall-to-roof transition
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Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge

Vented roof assembly at rake retrofitted with spray foam and additional insulation installed at the attic floor and extended to the rake edge
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Ventilation air comes directly from outdoors, not from adjacent dwelling units, garages, crawlspaces, or attics

Ventilation air comes directly from outdoors, not from adjacent dwelling units, garages, crawlspaces, or attics
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Ventilation air inlet is too close to exhaust outlet

Ventilation air inlet is too close to exhaust outlet
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Ventilation air inlet is too close to exhaust outlet

Ventilation air inlet is too close to exhaust outlet