
Installation
OUTSIDE 
Outside fresh air is mandatory when installing this unit in airtight homes and mobile homes.
A 
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.
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EXHAUST AND FRESH AIR INTAKE LOCATIONS:
Figure 10: Outside Air Connection.
| 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" | 10 | 15/16" | 
| (278 mm) | |||
| (227 mm) | 
 | 
 | |
| 
 | 4 1/8" | 1 3/8" | 
 | 
| 
 | (105 mm) | (35 mm) | 
 | 
| 
 | Figure 11: EF5 Inlet and Outlet Location. | 
 | |
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