SECTION 6: VENTING

6.7 Vent Material

Vent material may be single wall 26 ga. (minimum) galvanized steel or equal thickness stainless steel. Completely seal all joints, refer to Page 7, Section 6.2.

If penetrating a combustible wall or roof, a listed thimble with 2" (5 cm) clearance must be used. Where local codes permit, a single section of type B-1 vent material may be used at the roof or wall penetration instead of a thimble. Ensure vent manufacturer's clearance from vent material is maintained. Seal annular space of the type B-1 vent as well as all joints in the remaining vent.

Figure 3: Vent and Roof Detail

Vent

 

Terminal

 

 

Flashing

 

or Rain Collar

Roof

 

 

Listed Thimble

2" Air Gap to

Vent

 

Combustible Material

 

Figure 4: Standard Vented Heater - Vertical and Horizontal Vent Termination

 

Vent Terminal

 

 

Flashing

 

 

 

(By Others)

 

 

 

Listed

 

 

 

Thimble

 

 

 

(2" Clearance)

 

 

 

4" Dia.Vent

 

Listed

 

Vertical

90°

Thimble

(2" Clearance)

Option

Bend

Flashing

 

Horizontal

 

(By Others)

 

Option

 

 

 

Vent

 

Vent

 

 

 

 

 

 

Terminal

 

Condensate

12" (31 cm)

Note: Vent supports

 

Minimum

 

Trap to Drain

 

not shown.

 

(Optional)

 

 

Model

Vent Diameter

Part Number

UHA 150 - 400

4" (10 cm)

90502102

9

Page 15
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Roberts Gorden 350, 200, 150, 400, 300, 175, 225 250 service manual Vent Material, Vent and Roof Detail

225 250, 175, 300, 400, 150 specifications

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