W415-1112 / 06.12.12
9
0
2 (4)
4 (8)
6 (12)
8 (16)
10 (20)
5
(10)
10
(20)
15
(30)
20
(40)
25
(50)
AIR INTAKE LINERS
HORIZONTAL RUN
VE
R
TI
C
AL
R
IS
E
The duct terminations must be lo-
cated so they can not be blocked (i.e.
snowdrifts). 4' (1.22 m) above grade
or above maximum snow grade for the
area is recommended. make a 6 ½"
inch 165 mm) hole to suit in an outside
wall of the house. from outside, place
the fresh air hood into the hole, open
side down. Seal with caulking and
secure.
WHEN INSTALLINg A SYSTEM FOR MAkE Up FRESH AIR, THE INSTALLER MUST TAkE INTO
ACCOUNT A SATISFACTORY AIR MAkE Up RATE IN THE LIkELIHOOD THAT MORE THAN ONE
FUEL-BURNINg FURNACE IN A MULTI FURNACE CONFIgURATION MAY OpERATE AT THE SAME
TIME.
The 4" (102 mm) inlet can also draw combustion air from the room provided adequate make up air is avail-
able.
fresh air makeup for the oil furnaces must follow criteria set in installation standard CSa b139-09 "installation
Code for oil burning equipment", and installed by a certified oil mechanic.
fresh air makeup for gas fired furnaces must follow criteria set in installation standard Can/CGa-b149.1 or
Can/CGa-b149.2.
fresh air makeup solid fuel furnaces must follow criteria set in installation standard Can/CSa-b365.
Horizontal run may be:
5' (1.52 m)
15' (4.57 m)
20' (6.10 m)
25' (7.62 m)
vertical rise is between:
6' & 10' (1.83 m & 3.05 m) max
3' & 6' (0.91 m & 1.83 m)
1' & 3' (0.31 m & 0.91m)
0' & 1' (0 m & 0.31 m)
