A.O. Smith 402, 400, 401, 403, 405, 404 Standard Vent Horizontal Category, III Stainless, Steel, Iii

STANDARD VENT - HORIZONTAL (CATEGORY III)

Figure 7.

TABLE 11. STANDARD HORIZONTAL VENTING (CATEGORY III)

	APPLIANCE	CERTIFIED	EXHAUST	MAXIMUM
MODEL	CATEGORY	VENTING	VENT SIZE	VENT LENGTH
		MATERIAL	INCHES (cm)	FEET (m)
I000	III	STAINLESS	10”(25.4 cm)	70' (21.3 m)
		STEEL
1300	III	STAINLESS	12" (30.5 cm)	70' (21.3 m)
1500		STEEL
1850	III	STAINLESS	14"(35.6 cm)	35' (10.7 m)
2100		STEEL
2500	III	STAINLESS	16" (40.6 cm)	35' (10.7 m)
		STEEL

WARNING: No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.

•A maximum of two elbows can be used on inlet and outlet vent piping respectively. Each elbow is equal to 10 feet (3 m) of straight pipe.

•Use only special gas vent pipes listed for use with Category III gas burning heaters, such as stainless steel Saf-T-Vent by Heat Fab, Inc., available from A.O. Smith, 500 Tennessee Waltz Parkway, Ashland City, TN 37015 Phone: 1-800-433-2545 or Fax: 1-800-433-2515. Pipe joints must be positively sealed.

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