Fittings & Routing · Expanded master guide
Transitions & Reducers
Ten expanded field guides for rectangular, round, eccentric, equipment, and custom transitions and reducers.
Orientation is part of the fitting.
Mark top, bottom, centerline, flat side, airflow direction, and equipment relationship before the fitting leaves the floor.
Mark top, bottom, centerline, flat side, airflow direction, and equipment relationship before the fitting leaves the floor.
Every guide teaches the full task
1Before you start
2Lay it out
3Set and support it
4Make the connection
5Check the install
6Common mistakes
7Stop and ask
Transitions & ReducersExpanded guide
Rectangular concentric transition
Centered size change
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Rectangular eccentric transition flat on top
Maintain top elevation
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Rectangular eccentric transition flat on bottom
Maintain bottom elevation
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Rectangular-to-round transition
Equipment/branch connection
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Rectangular-to-flat-oval transition
Space-saving change
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Round concentric reducer
Centered reduction
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Round eccentric reducer flat on top
Maintain top clearance
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Equipment discharge transition
Fan/AHU outlet
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Equipment inlet transition
Fan/AHU inlet
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Field-measured custom transition
Mismatch correction
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