Lochinvar RPD-I-S User Manual page 24

Venting continued-
Vent terminal configuration for mild climates
When venting through the wall, the exhaust terminal must exit the structure at a
minimum of 16" (40.6 cm) from either side, or any location above the intake terminal.
The exhaust terminal must not be located below the intake terminal for any reason.
Two 45° end terminal elbows are supplied. These must be installed at the extreme ends
of the intake and exhaust venting outside the building.
CAUTION - NEVER INSTALL AIR INTAKE ABOVE EXHAUST
Vent terminal configuration for cold climates
The exhaust should be installed above the air intake on the diagonal, 18" horizontal and
18" vertical from the air intake (see figure 11b), and should extend from the finished wall
by a minimum of 10".
The air intake screen can be removed for cold installations but this may make the air
intake susceptible to debris buildup from birds or other animals. If the air intake
screen is removed to prevent freezing, it is recommended that the air inlet screen be
installed during the spring.
Figure 11a
Figure 11b
24 RPD-I-S Rev A