Roberts Gorden VANTAGE HE HE-125 - Manual (Page 15)

SECTION 3: C LEARANCES TO C OMBUSTIBLES
9
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream
from where the burner and burner tube connect.
FIGURE 12: VENTING
(inches) (centimeters)
Model A E F A E F
HE-40 14 18 18 36 46 46
HE-60 14 18 18 36 46 46
HE-80 20 24 18 51 61 46
HE-100 20 24 18 51 61 46
HE-125 20 24 18 51 61 46
HE-150 20 30 18 51 77 46
HE-175 20 30 18 51 77 46
Radiant Tubes
Vent
Pipes
Unvented
Vented
A E
F