Offset built too tight causing pressure drop

A tight offset may fit in the ceiling but still hurt performance. Check offset angle, length, and the O.W.L. before fabricating or installing.

Stop if

• This offset is [offset] over [available length]. Does this layout give us enough length, or do you want a different route/fitting?

Watch out

• Do not build a short aggressive offset just because it clears the obstruction.

Check

• Measure obstruction, offset, and available length.
• Use O.W.L.: Offset × fitting multiplier = Length needed.
• Check whether the offset creates a hard turn right before a branch, VAV, or diffuser.
• Compare against the approved routing/detail.
• Ask before forcing a tight offset into a short space.

Steps

• Measure obstruction, offset, and available length.
• Use O.W.L.: Offset × fitting multiplier = Length needed.
• Check whether the offset creates a hard turn right before a branch, VAV, or diffuser.
• Compare against the approved routing/detail.
• Ask before forcing a tight offset into a short space.

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