Worst Case CAZ Depressurization & Draft Test Mobile App

Included Fields

Customize to add, remove, or edit any of the fields below.

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  Client Name:

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  Job Number:

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  Technician Name:

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  Date of Test:

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  CAZ Test Setup

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  draft vent(s) to cool to room-temperature.

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  Put dwelling in winter time condition, IE: all exterior doors & windows shut

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  Ensure all interior doors are open

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  Close any operable vents to the outdoors

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  Check furnace/air handler fi lter--It must be clean

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  Check and Clean dryer lint fi lter

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  Set up DG 700 to measure CAZ with reference to outdoors on channel A

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  Set up DG 700 to measure Vent with reference to CAZ on channel B

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  Identify Venting Type

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  Select the venting type that describes the combustion venting system at the time of this test

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  Determine Minimum Acceptable Draft Pressure

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  If Outdoor temp is Below 10°F = -2.

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  If Outdoor temp is Between 10°F and 90°F, Enter temp in box below

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  If Outdoor temp is Above 90°F = -0.

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  Outdoor Temp (°F)

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  Minimum Acceptable Draft (Expressed as PA)

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  1. Starting Pressure: Record current CAZ pressure (channel A) (PA)

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  Exhaust Fans: Turn on ALL exhaust fans.

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  Dryers: Turn on ALL dryers.

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  Air Handler: Turn on furnace/air handler fan.

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  simulate 300 CFM exhaust fl ow.

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  CAZ Doors: Close CAZ doors.

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  7. Other Doors: Close any other doors that infl uence CAZ pressure, record CAZ (channel A) (PA) *...

• ...and More!