Multi-Unit Installation
Multi-Unit Systems
Accurate installation of a good dryer exhaust system in multi-family construction is
especially important. The exhaust ducting restrictions applied by this type of construction
should cause the planner to be more concerned than in single-family construction.
When the total length of the exhaust duct or the number of turns in the system exceed the
maximum limitations recommended by the dryer manufacturer, the planner must seek an
alternate solution. One solution could be to install a common ducting system that is
capable of handling the discharge of several dryers at various points along the system.
The scope of the subject is far to broad to be extensively described within this
publication. Sufficient information is presented, however, to make the planner aware of
the importance of special attention to the subject.
Two types of common ducts are generally used: (1) the common fan assisted dryer
exhaust stack (with an auxiliary roof fan); and (2) the chimney type common dryer
exhaust.
Fan assisted stack and chimney designs must meet all local code requirements.
It is
suggested that professional engineering counsel should be sought in these matters.
It is suggested that dryers be installed as close to the common duct as possible.
Dryers discharges must be offset to prevent one unit from exhausting directly into
another.
See Illustration No.1.
Illustration No.1.
Section 2
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Summary of Contents for Clothes Dryer
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