NTI Boiler: Venting material and adapter rules
Venting material and adapter rules on a NTI boiler: Mixing materials without the right adapters can let flue gas leak into the living space.
Applies to: Exhaust and intake material compatibility
How to fix venting material and adapter rules: step by step
- Never use B vent for exhaust. It is for intake only.
- Do not use PVC in the closet or alcove in the US or Canada. Use approved CPVC, polypropylene or stainless steel.
- When venting with PVC, insert the factory supplied 5 inch length of CPVC into the boiler exhaust connection before transitioning to PVC. Do not insert PVC directly into the boiler exhaust connection.
- For AL29-4C stainless vent, fit a PVC-to-stainless adapter at the boiler vent connection and at the termination when a PVC termination kit is used.
- Do not mix AL29-4C from different manufacturers unless the manufacturer's adapters are used.
- Do not use cellular core PVC, cellular core CPVC or Radel.
- Do not remove the factory-installed exhaust and intake components near the appliance, or the warranty is void.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
If the unit shows an error code, look it up: NTI Boiler codes
Models
TRX085TRX110CTRX150TRX199TRX199C
Source: NTI TRX150 manual, p. 34. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.