Figure 20: 2-Foot Deco Grille And Protective Grille; Figure 21: Lower Clearance Shield; Figure 22: Venting - Roberts Gorden Vantage CTHN-40 Kit Instructions

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 20: 2-FOOT DECO GRILLE AND PROTECTIVE GRILLE

A
C
B
D

FIGURE 21: LOWER CLEARANCE SHIELD*

A
B D
C
*When installed in the first 10' (3 m).

FIGURE 22: VENTING

A
E
Unvented
Radiant Tubes
Vented
Model
CTHN-40
CTHN-60
CTHN-80
CTHN-100
CTHN-125
CTHN-150
CTHN-175
CTHN-200
Model
CTHN-40
CTHN-60
CTHN-80
CTHN-100
CTHN-125
CTHN-150
CTHN-175
CTHN-200
Model
CTHN-40
CTHN-60
Vent
CTHN-80
Pipes
CTHN-100
CTHN-125
CTHN-150
F
CTHN-175
CTHN-200
(inches)
A B C
5 20 41
5 27 51
5 30 58
5 32 60
5 35 65
5 39 71
8 44 74
8 47 76
(inches)
A B C
5 25 22
5 30 27
5 37 37
5 39 39
5 41 41
5 43 50
- UNAPPROVED -
- UNAPPROVED -
(inches)
A E F
14 18 18
14 18 18
20 24 18
20 24 18
20 24 18
20 30 18
20 30 18
20 30 18
SECTION 6: C
RITICAL
(centimeters)
D A B
20 13 51
27 13 69
30 13 76
32 13 81
35 13 89
39 13 99
44 20 112
47 20 119
(centimeters)
D A B
25 13 64
30 13 76
37 13 94
39 13 99
41 13 104
43 13 109
- UNAPPROVED -
- UNAPPROVED -
(centimeters)
A E
36 46
36 46
51 61
51 61
51 61
51 76
51 76
51 76
C
ONSIDERATIONS
C D
104 51
130 69
147 76
152 81
165 89
180 99
188 112
193 119
C D
56 64
69 76
94 94
99 99
104 104
127 109
F
46
46
46
46
46
46
46
46
17