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Graphic 1
A- Minimum clearance required between the appliance and an unshielded combustible
ceiling.
B- 20 in. (500 mm) minimum;
C- 1 in. (25 mm) minimum;
D- Between 1 in. and 3 in. (25 mm and 75 mm);
E- 3 in. (75 mm) minimum;
F- 18 in. (457 mm) minimum.
1- Shielding;
2- Non-combustible spacers;
3- Ceiling protector;
4- Combustible wall;
5- Ceiling;
6- Appliance (side view);
7- Appliance (top view).