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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL
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Figure 10: Standard Vented Heater - Common Vertical Vent Termination
Requirements:
•Maximum of four heaters can be commonly
vented through the roof.
• Heaters must be of the same BTU output.
• Heaters must be controlled by a common
thermostat.
• Connections to a common stack must be
positioned to avoid direct opposition between
streams of combustion gases.