Ductwork

This section describes the options available in the Ductwork group in the Design Master HVAC Options dialog box.

customization--ductwork-options-dialog-box

Rectangular duct label format: The duct label used on rectangular ducts. See the Duct Label Format Codes section below for more information about the values that can be automatically inserted in the label.

Lined rectangular duct label format: The duct label used on lined rectangular ducts. See the Duct Label Format Codes section below for more information about the values that can be automatically inserted in the label.

Same as non-lined duct label format: The duct label for lined rectangular ducts will use the Rectangular duct label format option.

Round duct label format: The duct label used on round ducts. See the Duct Label Format Codes section below for more information about the values that can be automatically inserted in the label.

Lined round duct label format: The duct label used on lined round ducts. See the Duct Label Format Codes section below for more information about the values that can be automatically inserted in the label.

Same as non-lined duct label format: The duct label for lined round ducts will use the Round duct label format option.

Oval duct label format: The duct label used on flat oval ducts. See the Duct Label Format Codes section below for more information about the values that can be automatically inserted in the label.

Lined oval duct label format: The duct label used on lined flat oval ducts. See the Duct Label Format Codes section below for more information about the values that can be automatically inserted in the label.

Same as non-lined duct label format: The duct label for lined flat oval ducts will use the Oval duct label format option.

Maximum single line width (in): The maximum width that ducts with their Graphics set to Automatic will be drawn single-line. All ducts larger than this value will be drawn with double-line.

Default interior lining width (in): The default Interior Lining Width when creating or modifying ducts.

Default exterior lining width (in): The default Exterior Lining Width when creating or modifying ducts.

Show background below ductwork: Whether the background and other entities below ductwork are visible.

Yes: The background and other entities are visible. The ductwork entities are inserted significantly below their proper elevation. The ducts will hide each other but nothing else on the drawing.
No: The background and other entities are not visible. The ductwork entities are inserted at their proper elevation. Anything below that elevation will be hidden.

Return and exhaust arrow direction: The direction that centerline arrows point for return and exhaust ductwork.

Toward diffusers: Arrowheads point toward diffusers. The centerlines point in the opposite direction from the flow of the duct. Determining the next and previous duct is the same as with supply ducts.
Flow direction: Arrowheads point in the direction of flow, away from diffusers. Determining the next and previous duct depends upon the type of duct.

Minimum duct size (in): The minimum size to which ducts will be resized.

Use odd rectangular duct sizes below this size (in): By default, ducts are resized to even sizes. Rectangular ducts resized below this value will be sized to even or odd sizes.

Use odd round duct sizes below this size (in): By default, ducts are resized to even sizes. Round ducts resized below this value will be sized to even or odd sizes.

Use odd flat oval duct sizes below this size (in): By default, ducts are resized to even sizes. Flat oval ducts resized below this value will be sized to even or odd sizes.

Duct Label Format Codes

The Duct Label Format options use special codes to insert duct dimensions in the duct label. These codes are replaced with dimension values from the database when the labels are shown on the drawing.

Multiple codes can be included in a duct label, allowing you to label both interior and exterior dimensions, or provide the dimension in both imperial and metric units.

Interior dimensions are the specified width and depth for the duct.

Exterior dimensions are the interior dimensions plus two times the interior lining (once for the lining on each side of the duct). Exterior dimensions do not include exterior lining width.

Standard Dimensions: Duct dimensions in inches.

W: Interior width in inches.
D: Interior depth or diameter in inches.
WE: Exterior width in inches.
DE: Exterior depth in inches.

Metric Centimeter Dimensions: Duct dimensions converted from inches to centimeters.

WM: Interior width in centimeters.
DM: Interior depth or diameter in centimeters.
WME: Exterior width in centimeters.
DME: Exterior depth in centimeters.

Metric Millimeter Dimensions: Duct dimensions converted from inches to millimeters.

WMM: Interior width in millimeters.
DMM: Interior depth or diameter in millimeters.
WMME: Exterior width in millimeters.
DMME: Exterior depth in millimeters.

Soft Metric Millimeter Dimensions: Duct dimensions converted from inches to millimeters using 25 millimeters per inch (rather than 25.4 millimeters per inch).

WMMS: Interior width in soft millimeters.
DMMS: Interior depth or diameter in soft millimeters.
WMMSE: Exterior width in soft millimeters.
DMMSE: Exterior depth in soft millimeters.

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