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NTI Boiler: Sidewall concentric or low profile exhaust location

Updated · by Aurora Star Tech Inc.

Sidewall concentric or low profile exhaust location on a NTI boiler: Sidewall concentric or low profile termination, layout rule. Exhaust and intake spacing matters here. Wrong spacing means flue gas gets pulled back into the intake. Follow the manual over the kit sheet.

Homeowner with a boiler problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Applies to: Sidewall terminations

Common causes of sidewall concentric or low profile exhaust location

  • Exhaust terminal too close to the air intake
  • Kit sheet clearances followed instead of the TRX manual clearances
  • Terminal placed where wind or snow can recirculate flue gas

How to fix sidewall concentric or low profile exhaust location: step by step

  1. Keep the exhaust terminal at least 18 in above the air intake termination.
  2. Assemble per the kit instructions.
  3. Where the kit sheet and the manual disagree, the manual clearances win.
  4. Check the finished terminal against the manual figure before you leave.
  5. Look for snow drift or shrubs near the termination.
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. 39-40. 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.

Emergency Boiler Repair

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