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SECTION 3: CLEARANCES TO COMBUSTIBLES
7 of 73
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, tees, elbows and crosses.
2. Clearances B, C and D can be reduced by 50% after 7500 mm of tubing downstream
from the burner.
3. All measurements are in millimeters.
** When installed in the first 3 m.
FIGURE 7: LINEAR & DOUBLE LINEAR, 2 FOOT DECO GRILLE, PROTECTIVE GRILLE
Model
HE15ST
HE30DL
HE20ST
HE40DL
HE25ST
HE50DL
HE30ST
HE60DL
HE35ST
HE70DL
HE40ST
HE45ST
HE50ST
A 150 150 150 150 150 150 200 200
B 890 970 970 1020 1170 1220 1280 1330
C 1570 1650 1650 1780 1930 1970 2010 2080
D 890 970 970 1020 1170 1220 1280 1330
A
C
D
B
FIGURE 8: UNDERSHIELD **
Model
HE15ST
HE30DL
HE20ST
HE40DL
HE25ST
HE50DL
HE30ST
HE60DL
HE35ST
HE70DL
HE40ST
HE45ST
HE50ST
A 150 150 150 150 150 150 - -
B 990 1020 1270 1270 1370 1400 - -
C 840 965 1120 1120 1220 1270 - -
D 990 1020 1270 1270 1370 1400 - -
A
C
D
B
FIGURE 9: LINEAR & DOUBLE LINEAR, VENTING
Model
HE15ST
HE30DL
HE20ST
HE40DL
HE25ST
HE50DL
HE30ST
HE60DL
HE35ST
HE70DL
HE40ST
HE45ST
HE50ST
E 1000 1000 1000 1000 1000 1000 1000 1000
F 500 500 500 500 500 500 500 500
Radiant tubes
Fan
Unvented
Vented
E
F