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9
2.4 exterior hooDs instAllAtion / locAtion
Refer to illustration below for an example of proper connection method of the insulated ducts to the hoods. An “Anti-Gust Intake Hood”
should be installed in regions where snow is expected.
VD0028
exHauST
Hood*
inTake
Hood
B
B
a
a
B
opTional
ducT locaTion
Tape and ducT Tie
caulking
Make sure intake hood is located at least 10 feet away from any of the following:
• Dryer exhaust, central vacuum vent
• Gas meter exhaust, gas barbecue-grill
• Any exhaust vents or chimney from a combustion source
• Garbage bin and any other source of contamination such as parking lots, streets
For multifamily buildings only:
Make sure exhaust hood is located at least 3 feet away from any of the following:
• Property lines
• Operable openings into buildings (door, window)
• Intake and exhaust hood(s) shall be protected with corrosion-resistant screens, louvers or grilles having openings not less than
1/4 inch and not larger than 1/2 inch.
• Install hood(s) at least at 18 inches away from the ground OR depth of expected snow accumulation, whichever is greater.
To minimize cross-contamination of exhausted stale air into the fresh air intake:
Single detached, attached homes and townhouses:
• Maintain a 6 feet minimum separation distance between outdoor air intake and exhaust hoods OR use an approved factory-built
intake/exhaust combination termination fitting.
Multifamily buildings:
• Maintain a 10 feet minimum separation distance between outdoor air intake and exhaust hoods OR use an approved factory-built
intake/exhaust combination termination fitting.
Ignoring these recommendations could significantly degrade the quality of the incoming air which, in some cases, could result in health
consequences. In the event of a conflict between our recommendations and any local requirements, the latter shall have priority.
WARNING
!
caulking
legend:
a - Single family ≥ 6 fT
mulTifamily ≥ 10 fT
B - 18" or depTH of expecTed Snow accumulaTion
* Do not install exhaust hood with non-return
damper since it can freeze in winter.
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