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Heat Recovery Ventilator (HRV) or Energy (Enthalpy) Recovery Ventilator (ERV)
Heated air flow is produced when the heating cycle is energized (set thermostat to “heat”)
Hidden sheet metal baffles prevent the transmission of light and sound through the transfer grille
High-Efficiency Gas Furnace
Hole drilled to verify sealant is present - Hole will be sealed after verification
Holes in the exterior walls are flashed and flashing is integrated with housewrap before installing rigid mineral wool insulation.
Home performance program labels are displayed on the electric panel showing the certifications this home has receivied, including ENERGY STAR Certified Home, the EPA Indoor airPLUS, and the Home Energy Rating System (HERS) score.
Hot water for the home’s radiant floor heating system comes from roof-mounted solar thermal panels and an air-to-water heat pump provide.
Hot water recirculation loop runs through an insulated pipe under the home’s concrete slab.
House wrap is sealed at all seams and overlaps flashing to serve as a continuous drainage plane over the exterior walls.
HVAC duct layout
HVAC ducts can be encapsulated in 3 inches of closed-cell spray foam, then buried in R-49 of blown fiberglass insulation after the ceiling drywall is installed in the vented attic.
HVAC ducts, cavities used as ducts, and combustion inlets and outlets may pass perpendicularly through exterior walls but shall not be run within exterior walls unless at least R-6 continuous insulation is provided on exterior side of the cavity
ICF blocks used for the foundation walls consist of two sheets of rigid foam held together by plastic spacers and reinforced with steel bars forming a hollow wall that is filled with concrete for an ultra-efficient foundation system.
ICF forms are filled with the use of a concrete pumper truck
ICF foundation walls wrap the floor slab in R-22 of insulation while the entire space under the slab is covered with 4.3 inches of closed-cell spray foam.
ICF walls and an attic sealed and insulated to R-63 on the underside of the roof deck with 10 inches of open‐cell spray foam plus 2.7 inches of closed‐cell spray foam provide a complete thermal break around this home.
ICFs provide continuous wall insulation from the roof to the footing with very little thermal bridging
Identify what materials will constitute the continuous air barrier around the building envelope.
Identify what materials will constitute the continuous air barrier around the building envelope.
IECC and IRC minimum insulation requirements for new homes
Climate zone map
If a dropped soffit is used to house a duct, the soffit space must equal the duct diameter plus the insulation thickness
If airflow must be limited to a supply register, use balancing dampers at the trunk line rather than looping duct to control airflow
If fans share common exhaust duct, back-draft dampers installed
If filter is inaccessible, locate the air filter between the return air plenum and the air handler box
If furnace is accessible, locate the air filter between the return air plenum and the air handler box
If HVAC duct must be installed in an exterior wall, separate it from the exterior with at least R-6 of continuous rigid insulation
If the furnace is hard to access, locate filters at return registers covered by hinged grilles that are easy to open from inside the home
If wall registers are desired, install HVAC ducts in interior wall cavities
 Impervious surfaces like patio slabs, sidewalks, and driveways that are within 10 feet of the home should slope away from the house.
Improper flashing can allow rain water into walls, causing significant damage
In 2009 IECC CZ 5 and higher, install self-sealing bituminous membrane or equivalent over sheathing at eaves from the edge of the roof line to > 2 ft. up roof deck from the interior plane of the exterior wall.
In cathedral ceilings, parallel chord trusses allow thicker insulation levels over the exterior wall top plates
In cold climates, install slab edge insulation when pouring slab on grade foundations.
In cold climates, plumbing pipes should not be located in the building cavities over the garage
In line exhaust ventilation installed
In the attic, all of the top plate seams are sealed with canned spray foam before covering the ceiling deck with blown fiberglass.
In this gut rehab, drywall was removed then a sprayer-applied sealant was used to seal all large cracks and seams and then the 2x4 walls were filled with spray foam.
In two-story homes, the air barrier separating the wall insulation from the porch attic is sometimes missing
Inadequate amount of insulation installed with compression, misalignment, and voids
Individual metering or submetering of each unit allows residents to understand and better manage their water use.
Indoor unit installation of a mini split (ductless) heat pump.
Infiltration through band joist
Infrared image of a rim joist
Vinyl frame window replacement detail
Inspection of taped joint
Install a continuous air barrier below or above ceiling insulation and install wind baffles.
Install a filter with a MERV rating of 6 or higher in each ducted mechanical system
Install a foam gasket along top plates before installing drywall
Install a gasket around the plumbing vent stack in the exterior top plate
Install a housewrap drainage plane between the SIP panels and the exterior cladding
Install a rigid air barrier to separate the porch attic from the conditioned space.
Install a sealed enclosure over a non-IC rated recessed light fixture to air seal the can and to prevent insulation from touching the recessed can light.
Install a sill gasket between the sill plate and the foundation wall
Install an access panel cover with a gasket and duct tape the edges
nstall an air barrier behind fireplaces installed on exterior walls
Install an air barrier behind showers and tubs installed on exterior walls.
Install an air barrier behind staircases installed on exterior walls.
Install an air barrier on the exterior of attic knee wall insulation and to block open floor joist cavities under attic knee walls
Install an air barrier over dropped ceilings or soffits
Install an ENERGY STAR labeled insulated door with an automatic closer. Weather strip the door frame
Install bottom layer of rigid insulation
Install cement board behind tub and shower enclosures.
Install continuous rigid foam insulation or insulated siding to help reduce thermal bridging through wood- or metal-framed exterior walls.
Install continuous top plates or blocking at the tops of walls adjacent to conditioned space to minimize air leakage.
Install duct supports in line with ceiling trusses
Install ducts without excessive coils or loops
Install ducts without kinks or sharp bends
Install gutters and downspouts that divert water away from home.
Install insulating foam sheathing and tape all seams to serve as a continuous drainage plane behind the home’s cladding.
Install insulation and an air barrier around skylight shafts.
Install insulation under platforms constructed in the attic for storage or equipment.
Install remaining sidewall flashing, counter flashing, and shingles
Install rigid insulation and finish material below the framing and cavity insulation of a building overhang
Install rigid insulation or another wall sheathing product
Install self-adhesive sill flashing
Install self-sealing bituminous membrane or equivalent at all valleys and roof deck penetrations
Install shingle starter strip then kick-out diverter; attach to roof deck but not sidewall

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