Osburn 1800 Owner's Manual page 12

Graphic 5
A- 1 in. (25 mm) minimum;
1- Combustible wall;
2- Non-combustible spacers;
3- Brick.
Graphique 6
A- 1 in. (25 mm) minimum;
1- Combustible wall;
2- Non-combustible spacers;
3- 0.024'' (0.61 mm) thick sheet metal;
4- Brick.
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