Fantech SHR 8005R Mode D'emploi page 7

Installing ducts going to / from outside
INSTALLING THE DUCTING TO THE WEATHERHOODS
OUTSIDE WEATHERHOODS – The weatherhoods must have built-in "bird" screens with 6.35 mm (1/4 inch) minimum mesh to prevent birds and rodents
from entering into the ductwork. Do not use smaller mesh as it will be very susceptible to plugging up. The preferred location of the weatherhoods is:
• No less than 3 m (10 ft.) apart from each other.
• At least 457.2 mm (18 inches) snow line or ground level.
• Supply hood must be kept away from sources of contaminant, such as automobile exhaust fumes, gas meters, garbage cans, containers,
cooling towers, tar roofs, etc.
• Avoid prevailing winds, whenever reasonably possible.
The outside perimeter of the weatherhood must be sealed to prevent leakage into the building.
DUCTING FROM THE WEATHERHOODS –TO AND FROM THE HRV – Galvanized sheet metal ducting with sufficient cross section with an integral single piece
of insulated wrap with vapor barrier should be used to connect the HRV to the weatherhoods. The R-value of the insulation should be adequate for
condensation control. Insulated flex duct may be used in moderation, if sized and installed properly. (Consult local codes)
All ducts should be sealed using a good bead of high quality caulking (preferably acoustical sealant) and a high quality aluminum foil tape, or other
approved duct sealant.
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