
FIGURE 19: U-Tube  Heater Layout Overview
LEGEND
Burner
 Reflector
 Reflector

 Tube 10' (3.0 m)
 Tube 10' (3.0 m) 
 Tube 5' (1.5 m)**
 Tube 5' (1.5 m)**
Tube/Reflector
Hanger
Coupling
 Assembly
 Assembly
Vent Adapter (Not Shown)
a = 14" (36 cm)
Reflector Width (Not Shown)
b = 2" (5 cm) End Cap to Burner
c = 2" (5 cm) End Cap to Hanger
d = 7' 6" (2.3 m) Distance First Hanger
e = 10' (3.0 m)
Distance Between Hangers
f = 5' (1.5 m)
Distance Between Last Full Tube Hanger and Half Tube Hanger
g= 12.5" (32 cm) Burner Length h = 11" (28 cm) Burner Height
*Requires the last reflector before the 
**Requires the last tube before the 
| 
 | bc | 
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| g | 
 | e | 
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| h | 
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| 
 | 20' (6.1 m) Tube Length* | 
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| 
 | bc | 
 | 
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| g | d | f | 
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| h | 
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| 
 | 30' (9.1 m) Tube Length** | 
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| 
 | bc | 
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| g | d | e | 
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| h | 
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| 
 | 40' (12.2 m) Tube Length | 
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| 
 | bc | 
 | 
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| g | d | e | f | 
| h | 
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| 
 | 50' (15.2 m) Tube Length* ** | 
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