15
Operating Instructions and Owner’s Manual
Enerco | Heatstar ER2STG Tube Series Heater
FIGURE 10: Unvented Operation
36”
36”
A
1. Ventilation equal to 4 CFM per 1,000 BTU/HR firing rate must
be provided in unvented heater installations
2. For dimensions A "unvented" refer to ( Figure 1- Minimum
Clearances to Combustibles.)
3. This heater requires ventilation in the building to dilute the
products of combustion and provide fresh air for efficient
combustion.
FIGURE 10b: Double Wall
Double wall vent run
Double wall terminal end
FIGURE 11: Vertical Venting
18"(45cm)
18" (45cm) Min. 3'-0" (91cm) Min.
8"(20cm) to 10"(25cm) Max.
6' (182cm) Min.
FIGURE 10A: Single Wall
Single wall vent run
Single wall terminal end
18" (45cm) Min.
3'-0" (91cm) Min.
6' (182cm) Min.
2"(5cm) Clearance thimble
2"(5cm) Clearance thimble
required when flu pipe
extends through
combustible materials
(91cm)
(91cm)
Vent Adapter
