Log in or register to create Field Kits and Sales Worksheets. Why register?

Image Gallery

A complete HVAC system includes ducted returns
A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
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 technician conducts a duct blaster test
After securing the inner coil, cover the draw band and the seam with a generous amount of mastic
Air seal and insulate flex ducts
All other supply ducts and all return ducts in unconditioned space have insulation ≥ R-6
An ultra-efficient (COP 5.7) ground source heat pump provides hot water to an air coil in the central air handler which uses a variable-speed electrically commutated fan motor to distribute conditioned air to the home’s ducts.
Assembled section of fiber board duct
Back-draft damper still has a piece of tape that prevented it from rattling during shipping
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
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
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
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
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
Duct is run straight and supported properly
Duct to boot connection of jump duct is properly sealed with mastic
Duct to boot connection of jump duct not fastened and sealed
Duct work is uninsulated and not sealed at seams
Ducts are insulated but strapping is compressing the insulation therefore reducing the R-value
Ducts are properly insulated and supported without compressing the insulation
Ducts are run straight and supported properly
Ducts crammed into cavity, kinked and sharply bent
Ducts properly installed without compression and appropriately supported
Ducts properly installed without compression and appropriately supported
Ducts sagging because supports not installed at regular intervals
Ducts should not be located in exterior wall cavities
Ducts well supported
Ducts well supported
Ducts well supported
Ducts well supported by framing and straps as needed
Electronically controlled dampers allow this central air system to provide zoned heating and cooling to specific parts of the home.
Example of an HVAC installer’s balancing report form
Excessive length of duct installed
Excessive length of duct installed causing sharp bends
Excessive length of duct installed causing sharp bends
Exhaust fans in separate dwelling units should not share a common exhaust
Fan housing was oriented in the correct direction to allow proper exhaust duct installation
Fan housing was oriented in the correct direction to allow proper exhaust duct installation
Fan shares exhaust and does not have dack-draft damper installed
Fan shares exhaust and has a back-draft damper installed
Fans from seperate dwellings exhausted together without back-draft dampers and not sealed
Fiber board sheets are available with pre-cut shiplapped ends
Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long
Flex ducts are compressed
Flexible ducts in unconditioned space not installed in cavities smaller than outer duct diameter; in conditioned space not installed in cavities smaller than inner duct diameter
Flexible ducts supported at intervals as recommended by mfr. but at a distance ≤ 5 ft
Framing allowed duct work to be properly installed without compression
Grill and duct size based on calculated requirements for net free area
Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools
HVAC duct layout
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
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 wall registers are desired, install HVAC ducts in interior wall cavities
Inadequate amount of insulation installed with compression, misalignment, and voids
Install ducts without excessive coils or loops
Install ducts without kinks or sharp bends
Install supply registers in floors or ceilings to avoid routing ducts through exterior walls

Pages