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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
A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance.
A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi-pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance
A central heat pump water heating system with a temperature maintenance swing tank configuration uses the water from the primary storage tank to provide most of the heat for hot water circulation temperature maintenance
A coated OSB product with taped seams covers the walls to serve as both sheathing and weather-resistant barrier.
A combination of brackets and self-locking drawers. Drawer closures should be used to protect the home during seismic events.
A concrete slab floor can be elevated above local grade as a strategy to prevent flood damage.
A cone or disc of plastic or sheet metal can be installed on pipes and downspouts to prevent rodents from climbing up the outside and gaining access to the roof
A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels
A constant airflow regulator is fitted into the neck of the supply duct to control air flow to deliver the design airflow regardless of pressure variations
A continuous drainage mat rainscreen made from vacuum-molded plastic provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.
A continuous layer of polyethylene covers the crawlspace floor and is attached to the wall with wood nailing strips
A continuous load path uses structural connections to transfer horizontal and vertical loads from the roof to the foundation to help keep the building intact in high-wind and seismic events
A continuum of green (soft) to grey (hard) shoreline stabilization techniques used to mitigate the effects of erosion
A cool roof utilizes materials with high solar reflectance and thermal emittance to reflect solar energy and reduce heat gain to the home
A cool room should have low enough heat gains to be easily cooled by a small single-zone cooling system such as a mini-split or a window air-conditioner as shown here
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
A cross-section of a vinyl-framed window showing metal reinforcement which helps support the window and prevent collapse if exposed to heat from a fire.
A deck or other attached structure located at the top of a slope with vegetation underneath is at high risk of ignition during a wildfire
A demand plumbing layout uses a recirculation pump to speed delivery of hot water to plumbing fixtures.
A dense concentration of buildings and pavement can create the Urban Heat Island Effect, where local temperatures can be several degrees higher than the surrounding areas
A detached garage offers more space to place solar panels with likely fewer roof penetrations and more options for roof pitch and orientation.
A dimpled plastic water barrier protects the insulated concrete form basement walls and carries any ground water down the walls to the footing drain to minimize the opportunity for water intrusion and frost heave.
A dimpled rain mat and perforated drain pipe provide drainage around the basement foundation.
A direct-vent sealed-combustion fireplace takes its combustion air directly from outside through a dedicated air inlet and vents combustion products directly outside
A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust
A dormer with an openable window (not shown) can provide access to the roof if flood waters rise too high and too quickly; the dormer should be properly insulated, flashed, and air sealed
A drainage plane is created behind lap siding by installing furring strips on the exterior walls over house wrap which is overlapped and taped at all seams to serve as an air and water barrier.
A dry hydrant is a pipe a homeowner can have installed in a natural water source on their rural property to provide easy access to the water by firefighting crews.
A drywell, shown here used for downspout catchment, can also be used to receive water from a French drain.
A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
A ducted minisplit heat pump is hidden in the ceiling of this centrally located room with short duct runs to the registers located on each wall of the room.
A ductless heat pump is hidden behind a wall outcropping above the hallway ceiling.
A FIRM will identify specific SFHAs (colored and hatched areas) and localized BFEs (wavy black lines)
A flanged window unit is installed with straps that fasten to the interior surfaces of the plywood extension box; furring strips on each side of the window will be attached after the flanged window is installed and flashed
A flat plate solar hot water system heat potable water in a glass covered collector that sits on the roof.
A floor cavity between the first and second floor can provide a conditioned space for HVAC ducts if the rim joists are insulated and air sealed, if sufficient space is available, and if open-web floor joists are used
A foam gasket is installed along the top plates before installing drywall as an air-sealing step to help achieve a quieter, draft-free home.
A foaming cleaner is used to clean the coils inside this ductless indoor unit; a mini-split bib surrounds the unit to contain overspray and drips
A foaming sprayer and mini-split bib are required to properly clean this ductless wall-mounted indoor unit
A French drain contains a perforated drain pipe wrapped in rock and landscape fabric.