53
Other precautions:
• Do not locate the vent termination near
a window or any other structure, which
has glass facing the termination.
• Avoid installation where the unit will be
exposed to excessive winds.
• Install in a location where the exhaust
gas flow will not be affected by fans or
range hoods.
• Take care that exhaust gas will not
affect neighbors.
• If snow is expected to accumulate,
insure the end of the duct hood is not
covered with snow or hit by falling
lumps of snow.
• Never install the outlet in a below grade
such as in a window well.
• Always duct the exhaust to the outside
of the building away from where people
may congregate. For exhaust placement
recommendations relative to windows,
doors, air inlets and other opening see
figure 15.
• Make-Up Air
One important design criterion for any
heating, cooling or ventilation system is
called “make-up air” or “replacement
air.” This is based on the idea that
whenever your laser vent system sucks
air out of a sealed room, that creates a
vacuum, unless you provide a source of
make-up air to replace the air you are
evacuating. This serves the same
purpose as having air returns in each
room of a house with a forced-air
heating or cooling system.
A source of make-up air is important in
any laser vent system. Without
adequate replacement air, exhaust
efficiency can drop and result in an
inability of the vent system to remove
the fumes from a room operating under
vacuum pressure.
A temporary make-up air system can be
as simple as opening a window in the
work area, although this may not be
very practical in a commercial shop.
Users often provide replacement air by
running a length of duct from the
outdoors to (near) the laser.
Always select a route that will provide
the straightest and most direct path
outdoors. Never use PVC or other
nonconductive duct materials for the
exhaust system. Always use rigid or
flexible metalized ducting in the exhaust
system. Flexible metalized ducting must
be UL181 rated. Improper selection of
ducting can cause static charges, may
result in dust build up inside the duct,
and may cause a risk of fire or
combustion.
Check local building codes and with your
home owner association rules and
regulations to ensure your laser is not in
violation of any ordinances, rules and
regulations. Always use the steel hose
clamps provided with your DigiLAB laser
to connect ductwork. Always use foil duct
tape at connections to prevent the
escape of small amounts of particulates,
smoke and fumes.
Always use the Dremel DigiLAB laser in a
well-ventilated area.
Setup recommendation:
• 2 x 10 feet exhaust hose maximum
(provided with the Digilab Laser).
• Never use an exhaust hose smaller than
4” diameter.
• Ensure that the hose is never coiled,
kinked or flattened.
• Exhaust routing: Recommending a set
up with no elevation rise (see figure
xyz).
• Maximum two 90-degree bends per
hose.
SETUP
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