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11 common vertical venting, 12 outside combustion air supply, Section 8.11 – Roberts Gorden Low Intensity Unitary Heater Designed for Harsh Environments HE-40 User Manual

Page 46

11 common vertical venting, 12 outside combustion air supply, Section 8.11 | Roberts Gorden Low Intensity Unitary Heater Designed for Harsh Environments HE-40 User Manual | Page 46 / 72 11 common vertical venting, 12 outside combustion air supply, Section 8.11 | Roberts Gorden Low Intensity Unitary Heater Designed for Harsh Environments HE-40 User Manual | Page 46 / 72