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NTI Boiler: Combustion check at elevation above 2000 ft

Updated · by Aurora Star Tech Inc.

Combustion check at elevation above 2000 ft on a NTI boiler: Above 2000 ft, the installer must check and adjust combustion with a calibrated combustion analyzer. Derate the capacity as the high elevation table shows.

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

Applies to: TRX boilers above 2000 ft

How to fix combustion check at elevation above 2000 ft: step by step

  1. Check combustion with a calibrated analyzer.
  2. Adjust combustion per the manual.
  3. Apply the required capacity de-rate for the elevation.
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

More commissioning tips for boiler

Source: NTI TRX150 manual, p. 9. 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.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

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