Space Ray LTU Series Two Stage - Manual (Page 26)

Form #42710010
-24- May 2013
In multiple heater applications multiple heater applications multiple heater applications multiple heater applications, the combustion air intake may be ducted individually or common ducted in the
same configuration as shown for venting in Section C. For combustion air intake duct sizing, please refer to the
Vent Sizing Table
Vent Sizing Table Vent Sizing Table Vent Sizing Table and use the diameter indicated, based on the number of heaters per duct.
Flue vent termination
must be 1 ft. (30cm)
higher than combustion
air inlet cap
Perforated Cover
(Remove)
The combustion air inlet should
be not less than 3 ft. (0.9m),
either vertically or horizontally,
from the flue vent termination.
Combustion Air Cap
(Leslie VersaCap
Type B)
4” Diameter
Single-Wall Pipe
Flashing
1/2” (12mm) fall per 20ft (6m)
toward vent terminal
Horizontal
Through Sidewall
6” (15cm)
Minimum
4” Starting Collar
(field supplied)
3 ft. (91cm)
Minimum
Vertical
Through the roof
Control Box
Perforated Cover
(Remove)