Thermo Pride Gas/Propane Furnace Premiere Series 2-Stage CHX3 - Manual (Page 23)

All installations and services must be performed by qualified service personnel.
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H. Exhaust / Intake Piping And Condensate Drain Connections At Furnace
1. Figures 6B, 7, and 8 follow depicting typical exhaust vent and air intake connections for the
furnace model series CHX3 and the CDX3, respectively, as well as a list of required parts to
correctly install each system.
Figure 6B: Required Exhaust Vent and Air Intake Piping for CHX3 Furnace