Coaxial Vent Screw Placement - See Figure 5-3 - UTICA BOILERS MAHF-100 Manual

5.7 Coaxial Vent Screw Placement - See Figure 5-3

Two (2) screws shall be fastened through the outer
intake pipe behind the gaskets at equal distances,
approximately 180° apart. Note the screws used must
be no larger than No. 8-3/4 sheet metal screws and
must be zinc coated.
Figure 5-3 - Coaxial Screw Placement
FIGURE 5-4 Roof Mount Coaxial Venting
CAN BE USED ON ALL SIZES
FIGURE 5-5 - Coaxial Vertical Exhaust -
CAN BE USED ON ALL SIZES
12" (305 mm)
Minimum Separation
5 - COMBUSTION AIR AND VENT PIPING
Maintain 12"(305 mm)
US (18"(457 mm)
Canada) clearance above
highest anticipated snow
level 24" (610 mm)
Anticipated
Snow Line above roof or ground
Multiple
Appliances
Manufacturer
Recommends
Greater Separation
FIGURE 5-6 Side Wall Coaxial Venting
CAN BE USED ON ALL SIZES
FIGURE 5-7 - Coaxial Horizontal Exhaust -
CAN BE USED ON ALL SIZES
22
18" Vertical
Clearance to
ventilated soffit
Min. 8" (181
mm)
Max. 14" (356
mm)
Maintain 12"(305 mm)
US (18"(457 mm)
Canada) clearance
above highest
anticipated snow level
24" (610 mm) above
roof or ground
Anticipated
Snow Line
Ground
Multiple
Appliances
24" (610 mm)
Min. Separation
Manufacturer
Recommends
Greater
Separation
recommends gr
240013371 REV B, [10/01/2021]