Showing results 801 - 900 of 4973
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Compare gas tankless water heater efficiencies on the Energy Guide labels or look for the ENERGY STAR label
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Comparison of a building that sits below the Design Flood Elevation and renovated to be above the DFE and to add a second story.
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Comparison of a building that sits below the Design Flood Elevation and renovated to be above the DFE.
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Comparison of a building that sits below the Design Flood Elevation and renovated to be above the DFE.
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Comparison of costs for preventing vs. repairing earthquake damage from unreinforced masonry chimney failure
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Comparison of potential motion detection ranges for a passive-infrared sensor and an ultrasonic sensor used for lighting controls
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Comparison of three homes showing the amount of wall insulation needed to achieve a whole-wall insulation value of R-19 when the wall has double- versus triple-pane windows
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Compartmentalization isolates each dwelling unit within a multistory multifamily building, preventing vertical and horizontal airflow between units
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Compartmentalization isolates each dwelling unit within a rowhouse, preventing horizontal airflow between units
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Compartmentalization uses air sealing to reduce the stack effect in a multistory building - the large vertical pressure difference in a tall building is separated into smaller pressure differences at each floor
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Completed wall retrofit of masonry home (on right) showing new lap siding attached over four inches of rigid foam; windows were boxed with plywood to accommodate depth of foam plus 1x4 furring strips
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Components and cross section of an underground fiberglass storage tank used for residential fire suppression.
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Components of a heat pump water heater
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Components of a networked lighting system, their location, and communication (digital or analog) and wiring (wired or wireless) connections between each component.
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Components of a residential underground concrete fire suppression cistern include a manhole, suction connection, vent, and fill pipes
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Composition shingle roofing system showing sheathing and hot-mopped underlayment
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Comprehensive above-grade water management details for a crawlspace foundation include a capillary break over the crawlspace floor, slope the surface grade away, installing gutters that slope away, and capillary break under sill plate.
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Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
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Concept behind an evaporative cooler – warm air is cooled as the air passes through a wet medium and gives up some of its heat to evaporate the water
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Concrete (4 inches thick at 5% slope) provides a pest-resistant perimeter around the foundation
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Concrete is being poured into the wall forms made by the rigid foam insulated concrete form blocks.
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Concrete is poured into the rigid foam shell of the insulated concrete form (ICF) walls; a plastic water barrier has already been installed to protect the below-grade wall surfaces.
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Concrete pavers set in 4 inches of sand provide a pest-resistant ground break at the building perimeter.
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Concrete pier foundations can be used in place of wood piles in coastal areas where risk of erosion and scour is low.
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Concrete slab-on-grade foundation with a turn-down footing insulated on its top surface, showing anchorage of the wall to the foundation for seismic resistance
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Concrete slabs are used on both the first and second floors of this SIP home to provide passive solar heating from large south-facing windows.
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Condensate from this heat pump water heater is routed to a nearby floor drain, shared with the condensate lines from a condensing gas furnace and an air conditioning coil
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Condensation can form between the interior removable storm window and the existing window if the storm window is not air tight
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Condensation in storm windows can be prevented by air sealing around the storm window and allowing some ventilation to the outside from the original window
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Conduction is heat transferred by contact, like the hot pan that fries an egg or the hot asphalt that burns bare feet.
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Connect the plastic application tunnel from the injection equipment to the supply plenum.
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Connecting hardware helps tie the roof to the walls to ensure a continuous load path to improve a building’s resistance to high winds, floods, and earthquakes.
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Connecting hardware helps tie the walls to the top plates and rim joists to ensure a continuous load path to improve a building’s resistance to high winds, floods, and earthquakes.
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Connection of floor framing to support beam for a coastal home built on piles (band joist nailing to the floor joist is adequate to resist uplift forces).
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Consider using a metal duct elbow instead of flex duct at boot connections to prevent compressions
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Construct a double wall consisting of two framed walls forming a wide wall cavity for more insulation in the home’s exterior walls.
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Construct a vertical curtain wall of 29-gauge corrugated iron, concrete, or bricks that extends down 2 feet and out 8 to 12 inches to prevent rats from burrowing under crawlspace foundations
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Construct exterior walls with insulated concrete forms (ICFs) that provide insulation without thermal bridging, as well as air sealing, a drainage plane, and high structural strength.
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Construct exterior walls with structural insulated panels (SIPs) to provide an airtight wall with consistent insulation and very little thermal bridging.
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Construction defects are exponentially cheaper to fix in the design stage rather than waiting to deal with them until after construction is complete (Source: American Contractors Insurance Group, Inc. 2009).
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Continuous L-metal flashing integrated with underlayment at roof-wall intersections
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Continuous load path failure due to improper connections between a home and its foundation allowed this building to be overturned in hurricane force winds.
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Continuous load path failure due to improper connections between the roof decking and roof framing resulting from hurricane force winds.
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Continuous rigid insulation coupled with thin (1/4-inch) spacer strips that provide drainage behind the wall cladding without increasing the fire risk of the assembly.
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Continuously-operating ventilation & exhaust fans include readily accessible override controls
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Contractors install gasket between the second-story top plate and the rim joist to air seal at this wall to attic transition (Source: S&A Homes).
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Contractors will inspect the home and test HVAC equipment for safety concerns before air sealing begins.
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Convection is heat transferred via air or liquid movement in a pattern of cooling/falling and warming/rising like hot water that rises and falls in a percolating coffee pot.
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Conventional three-stud corner leaves a cavity that must be insulated by the framers—not good.
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Conventional three-stud corners leave a cavity that must be insulated by the framers—not good
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Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)
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Cool towers like this one at the Zion National Park Visitor Center can provide cooling to a building without any energy consumption
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Cooling air temperatures that can be achieved by a direct evaporative cooler at various outdoor conditions
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Cooling setting adjustments on a refrigerator allow the unit to be tuned to meet the target temperature for energy efficiency
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Coordinate with other trades including framers, plumbers, and electricians to prevent needless looping of flex duct
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Correct air sealing methods for common attic bypass air leakage paths.
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Correct seismic retrofit hardware for securing the sill plate to foundation wall
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Correctly anchoring an outside heating oil tank can prevent tank displacement if flooding occurs.
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Correctly anchoring an outside propane tank can prevent tank displacement if flooding occurs.
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