Aiko CTH3-115, CTH3-150, CTH3-200, CTH3-80 - page 40

CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
34 of 71
8.10 Common Vertical Venting
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.