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Ducts well supported

Ducts well supported
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Ducts well supported

Ducts well supported
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Ducts well supported

Ducts well supported
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Ducts well supported by framing and straps as needed

Ducts well supported by framing and straps as needed
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Ductwork in an unvented attic

Ductwork in an unvented attic
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Ductwork located in a vented attic is subject to high attic temperatures and significant heat gain through the walls of the ducts

Ductwork located in a vented attic is subject to high attic temperatures and significant heat gain through the walls of the ducts
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Ductwork, like this insulated flex duct, penetrates the subfloor where there are floor registers on the floor above.

Ductwork, like this insulated flex duct, penetrates the subfloor where there are floor registers on the floor above
Case Study:

Eaglesprings and Waterhaven Communities

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Electronically controlled dampers allow this central air system to provide zoned heating and cooling to specific parts of the home.

Electronically controlled dampers allow this central air system to provide zoned heating and cooling to specific parts of the home.
Video:

Encapsulated Ducts

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Encapsulated ducts are sprayed with ccSPF in an unconditioned attic

Encapsulated ducts are sprayed with ccSPF in an unconditioned attic
Presentation:

Energy Code - Module 7: Ducts, HVAC, Hot Water, and Lighting

Energy Code - Module 7: Ducts, HVAC, Hot Water, and Lighting
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Ensure that the air handler location does not conflict with duct routing

Ensure that the air handler location does not conflict with duct routing
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Example calculation of the leakage allowance for a duct leakage test at final for a ventilation system in a multifamily building

Example calculation of the leakage allowance for a duct leakage test at final for a ventilation system in a multifamily building
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Example calculation of the leakage allowance for a duct leakage test at rough-in for a ventilation system in a multifamily building

Example calculation of the leakage allowance for a duct leakage test at rough-in for a ventilation system in a multifamily building
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Example calculations for converting measured leakage airflow and leakage allowance when measured at a pressure other than the design or operating pressure

Example calculations for converting measured leakage airflow and leakage allowance when measured at a pressure other than the design or operating pressure
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Example calculations for converting total airflow and leakage allowance when measured at 50 Pa instead of the design or operating pressure

Example calculations for converting total airflow and leakage allowance when measured at 50 Pa instead of the design or operating pressure
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Example calculations for leakage allowance when testing only a portion of the ducts in a central exhaust system

Example calculations for leakage allowance when testing only a portion of the ducts in a central exhaust system
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Example design airflow data for the supply and exhaust registers of a ventilation system in a multifamily building

Example design airflow data for the supply and exhaust registers of a ventilation system in a multifamily building
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Example duct length calculations for a multifamily central exhaust system

Example duct length calculations for a multifamily central exhaust system
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Example of an HVAC installer’s balancing report form

Example of an HVAC installer’s balancing report form
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Excessive length of duct installed

Excessive length of duct installed
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Excessive length of duct installed causing sharp bends

Excessive length of duct installed causing sharp bends
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Exhaust fan ducts should be made of rigid metal ducting not flexible corrugated ducts like these and the ducts should be attached to the roof or soffit to vent completely to the outside not left open in the attic near an attic vent

Exhaust fan ducts should be made of rigid metal ducting not flexible corrugated ducts like these and the ducts should be attached to the roof or soffit to vent completely to the outside not left open in the attic near an attic vent