Raypak 122-322 Operating And Installation Instructions page 28

Type h, wh, & p hi delta 122; 162; 202; 242; 322
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SECTION J-1
Natural Draft Vertical Venting (Category I)
NATURAL DRAFT VERTICAL VENT
NOTE:
**Vent lengths are based on a lateral length of 2 feet. Refer to the latest edition of the NFGC for further details. (ANSI Z223.1)
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