16
Outside fresh air is mandatory when installing this unit
in airtight homes and mobile homes.
A Fresh-air intake is strongly recommended for all
installations
. Failure to install intake air may result in
improper combustion as well as the unit smoking during power
failures.
When connecting to an outside fresh air source, do not use
plastic or combustible pipe. A 15⁄8” minimum (42 mm) ID (inside
diameter) steel, aluminum or copper pipe should be used. It is
recommended, when you are installing a fresh air system, to
keep the number of bends in the pipe to a minimum.
Installation
O
UTSIDE
F
RESH
-A
IR
C
ONNECTION
:
�
�
�
�
� ��
��� ���
��������
�����
�������
����
Figure 10: Outside Air Connection.
E
XHAUST
A
ND
F
RESH
A
IR
I
NTAKE
L
OCATIONS
:
EXHAUST
Base of unit to center of flue
10
15
/
16
”
(278 mm)
Center of unit to center of flue
1 3⁄8”
(35 mm)
FRESH AIR INTAKE.
Base of unit to center of intake
8
15
/
16
”
(227 mm)
Center of unit to center of intake
41⁄8”
(105 mm)
8
15
/
16
"
(227 mm)
4
1
/
8
"
(105 mm
)
1
3
/
8
"
(35 mm)
10
15
/
16
"
(278 mm)
Figure 11: EF5 Inlet and Outlet Location.
