Bradford White URG2PV50T6N Manual page 22

Venting (Part II) continued-
THROUGH THE ROOF VENTING: (VERTICAL VENTING)
Cut the necessary holes through the roof and ceiling and install the vent
connector as shown in Figure 8. Make sure that the installation meets the local
codes and/or The National Fuel Gas Code ANSI Z223.1 (Latest Edition) or
CGA/CAN B149 Installation Codes (latest edition).
Figure 8
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