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A complete HVAC system includes ducted returns
A condensing boiler and indirect domestic hot water
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 ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
A fresh air inlet is ducted to the return side of the home’s central air handler; a motorized damper and electronic controls help balance the flow of fresh incoming air with controlled exhaust to meet ventilation requirements
A nylon draw band and tensioning tool are used to secure the inner coil of the pre-insulated flexible duct
A nylon draw band and tensioning tool are used to secure the inner liner of the pre-insulated flexible duct
A portable CO monitor is used to test for ambient CO near a ventless combustion fireplace
A properly sized high-efficiency heat pump is located in conditioned space in a closet inside the home.
A technician conducts a duct blaster test
A ventilation controller with a manual override is located on a central air handler fan that is located in an accessible location
A ventless gas fireplace has no chimney
After securing the inner coil, cover the draw band and the seam with a generous amount of mastic
Air flow is produced when central HVAC fan is energized (set thermostat to “fan”)
Air inlet is located in a convenient place for homeowner to clean
Air inlet is not convenient for cleaning and located next to exhaust outlets
Air seal and insulate flex ducts
All of the exhaust fans are wired to one labeled switch at the electrical panel
All other supply ducts and all return ducts in unconditioned space have insulation ≥ R-6
All return air and mechanically supplied outdoor air pass through filter prior to conditioning
An HRV or ERV provides balanced ventilation
An oil-fired boiler with direct combustion air and exhaust venting
Assembled section of fiber board duct
At the outlet of the dryer exhaust duct, install a hooded vent with a louvered damper
Back-draft damper still has a piece of tape that prevented it from rattling during shipping
Bathrooms should be equipped with an exhaust fan that vents directly outdoors
Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC
Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Boot has been covered with insulation and sealed with mastic
Boot has been covered with insulation and sealed with mastic
Boot is uninsulated
Boot to drywall connection not sealed
Boot to drywall connection sealed
Boot to floor connection not sealed
Boot to floor connection sealed
Building cavities not used as supply or return ducts unless they meet Items 3.2, 3.3, 4.1, and 4.2 of this Checklist
Cavity used for return is not insulated and is not air sealed, which will pull in air from outside
Cavity was not air sealed
Central-fan-integrated supply ventilation with exhaust fans for intermittently balanced whole-house ventilation
CFM rating may not meet the performance specification once installed
CFM rating may not meet the performance specification once installed
Clothes dryers vented directly to outdoors, except for ventless dryers equipped with a condensate drain
Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off
Common exhaust duct not shared by fans in separate dwellings
Connection in place but not sealed
Continuous supply and exhaust fans rated ≤ 1 sone by manufacturer
Continuously-operating ventilation & exhaust fans include readily accessible override controls
Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)
Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
Direct vent appliance installed
Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing
Door is not undercut therefore not contributing to pressure balancing
Dryer exhaust duct should vent directly to the exterior via a smooth, rigid metal duct
Dryer exhaust line terminates in the crawlspace
Dryer vent is run vertical with a 90 degree bend and does not vent to the outside
Dryer vents directly to the outdoors
Dryer vents directly to the outdoors
Duct boots sealed to floor, wall or ceiling using caulk, foam, mastic tape or mastic paste
Duct insulation is installed over boot
Duct insulation is installed over boot
Duct is compressed
Duct is compressed
Duct is kinked in cavity
Duct is located in unconditioned space and is not insulated
Duct is located in unconditioned space and is properly insulated
Duct is run straight and supoprted properly

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