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Ventilation
Natural Ventilation
FEDERAL LAW
183.620 - Natural ventilation system
(a) Except for compartments open to the
atmosphere, a natural ventilation system that meets
the requirements of Sec. 183.630 must be provided for
each compartment in a boat that:
(1) Contains a permanently installed
gasoline engine;
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Natural ventilation is a term
applied to the provisions of air flow inside a compartment
that is induced by non-powered means; i.e. ducts, louvers,
clamshells, etc. The requirements for the natural ventilation
system are described in detail in 183.630. Any compartment
that has a permanently installed gasoline fueled engine must
have natural ventilation. Engines for propulsion and auxiliary
equipment are included.
EXCEPTION: Compartments qualified
as open to the atmosphere do not require additional ventilation.
See 183.605 for the definition of
open to the atmosphere.
Permanently installed with
regard to an engine, means that it is securely fastened to
the boat’s structure and the necessary wiring, piping
and controls are connected and secured to the boat in accordance
with Title 33 CFR Part 183, Subpart I, Electrical Systems,
and Title 33 CFR Part 183, Subpart J Fuel Systems. The use
of “permanently installed” is to highlight its
difference from the use of “portable equipment”.
TO COMPLY WITH THE LAW
- Is there a gasoline fueled engine permanently
installed in the compartment?
If YES, then one of the following must be answered
YES.
- Is the compartment open to the atmosphere
as defined under 183.605?
or
- Is there a natural ventilation system
provided? See 183.630 for
requirements.
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