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Dryer Installation With Separate Exhaust (Preferred)
For ductwork less than 14 feet and 2 elbows equivalent and less than 0.3
inches static pressure:
NEVER exhaust the dryer into a chimney.
NEVER install wire mesh screen over the exhaust or make-up air
area.
NEVER exhaust into a wall, ceiling, or concealed space.
1. Make-Up Air opening from outside the building may enter the
enclosure from the top or side walls. The area of the opening should be
equal to 4 to 6 times the sum of the dryer duct areas. Provide 1 square
foot (.1m²) for each 6 inches (15.24 cm) diameter; 2 square feet (.2m²)
for each 8 inches (20.3 cm) diameter; and 4 square feet (.4m²) for each
12 inches (30.5 cm) diameter.
2. Enclosure (plenum) with service door. This separates the dryer air from
the room comfort air. If dryers use room air instead of outside air,
additional heat loss can be another 25 BTU/HR (6.3 kcal/hr) for each
cubic foot per minute (CFM) (.03m³/min.) used.
3. Zero inches (mm) clearance to combustible material allowed on sides
and at points within 4 inches (100 mm) of front on top.
4. Heat loss into laundry room from dryer front panels is about 60 BTU/
HR per square foot (15 kcal/hr per 0.1m²).
DRYER INSTALLATION
WITH SEPARATE EXHAUST
(PREFERRED)