Locating Intake Weatherhood
The intake weatherhood should be located as follows:
•4 - 6' from ventilation exhaust hood, and upstream of prevailing winds, if possible.
•At least 6' from a dryer vent, oil fill pipes, combustion outlets, gas meters, garbage containers or anything else, which may contaminate the air.
•Do not locate fresh air intake in garages, crawl spaces or attics.
•Install 18" above grade, or above expected snow accumulation.
Locating the Exhaust
Weatherhoods
The Exhaust Weatherhood should be located as follows:
• At least | |
• | At least 18" above grade or expected |
| snow accumulation |
• |
|
Outside Ducting the Weatherhoods
The ventilation portion of the Clean Air Furnace can be vented off either side of the unit by remov- ing knockouts provided. Once the knock outs in are removed, a bead of silicone can be placed on the plastic
The ductwork from the outside weatherhoods to the unit, is usually flexible ducting, although rigid pipe may be needed if the runs are greater than 20 feet. In either case the pipes (both exhaust and supply and the added fittings) must be insulated, with a complete vapor barrier. To minimize restriction in airflows the ducting should be short, with as few bends as possible. See diagram below for recommended connection of insulated ducting to outside weatherhoods.
Locating Weatherhood
WEATHERHOOD INSTALLATION
At least 3' from gas meters, combustion |
vents, or dryer vents |
• Do not install in garages, crawl spaces |
or attics |
1/4" (6 mm) SCREEN
(front view)
| COLLAR IS SUPPLIED TO |
SCREEN | ENSURE VAPOUR BARRIER |
(side view) | IS 100% SEALED TO |
| WALL PLATE |
| 12" galvanized |
| pipe supplied |
EXTERIOR
WALL
1.Thermal Collar slides over galvanized sleeve of Weatherhood.
2.Fasten Thermal Collar to Belt.
3.Slide the Insulated Flexible Ducting over the Weatherhood's galvanized sleeve and fasten it to the Thermal Collar.
4.Hood is hinged to allow for easy access for cleaning of bird screen.
24
