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NTI Boilers · Series

NTI Boilers Trinity TRX

The Trinity TRX is NTI's wall-hung residential condensing boiler line built around the XTRATECH stainless steel heat exchanger with large-diameter tubing. It runs from the TRX085 to the TRX199, plus the TRX110C, TRX150C and TRX199C combis, and is sold as Series I and Series II with the same ratings and a new user interface on the Series II.

Current seriesSold in CanadaNatural gasPropaneresidential
Request service for this seriesReplacement estimate

Series facts

Type
condensing
Efficiency
96% AFUE
Fuel
Natural gas or propane; NTI publishes LP conversion instructions for the TRX size groups.
Venting
2" runs up to 100 ft and 3" runs up to 150 ft per the product pages; the 2" terms on the TRX199 and TRX199C follow NTI technical bulletin 2022-10-26.
Models documented
7
Warranty
Not verified

The page headline says "models up to 96% AFUE": NTI rates the TRX085 at 96%, the TRX110C at 95.5% and the remaining models at 95%.

About the Trinity TRX

The TRX is a wall-hung, fully condensing boiler with a large-diameter-tube XTRATECH stainless steel heat exchanger, bayonet quick connectors, a swing-down control box and embedded Wi-Fi, with NTI marketing "modulating combustion up to 11:1" for the series. The spec table lists the TRX085, TRX120, TRX150 and TRX199 heating-only models and the TRX110C, TRX150C and TRX199C combis.

As with the FTVN, NTI sells a Series II version of the TRX: the same models and ratings with a reimagined user interface, setup wizard and new model codes (3314216–3314218 and 3314306–3314308), documented in its own I&O manual split across the 085–150C and 150–199C size groups. Both Series I and Series II manuals are cited on Boilers.ca, and their display-code tables are documented separately because the code lists differ by manual generation.

AFUE runs from 96% on the TRX085 down to 95.5% on the TRX110C and 95% on the rest, matching the "models up to 96% AFUE" headline. The combis deliver 2.7 GPM (TRX110C), 3.5 GPM (TRX150C) and 4.8 GPM (TRX199C) continuously at a 77°F rise, which together with the heat-loss calculation decides combi-versus-heating-only sizing for a BC home.

Highlights

  • XTRATECH stainless steel heat exchanger with large-diameter tubing
  • Wall-hung models TRX085–TRX199 plus TRX110C / TRX150C / TRX199C combis
  • Modulating combustion up to 11:1 (manufacturer figure)
  • 96% AFUE on the TRX085, 95.5% on the TRX110C, 95% on the rest
  • Embedded Wi-Fi and swing-down control box for service access
  • Series II adds a new user interface and model codes; same published ratings

Models

Trinity TRX models

One canonical page per model with input, output and efficiency kept separate.

CurrentSold in Canada
Input
9.4–85 MBH
Output (max)
—
AFUE
96 %

The NTI Trinity TRX085 is the entry TRX wall-hung condensing boiler: 9.4 to 85 MBH input, the only TRX rated 96% AFUE, at just 88.2 lb, with 2" venting to 100 ft or 3" to 150 ft per side.

Natural gasPropaneHeating-only
Specifications, manuals and service
CurrentSold in Canada
Input
13.2–120 MBH
Output (max)
—
AFUE
95 %

The NTI Trinity TRX120 is the 95% AFUE heating-only TRX between the 85 and the 150: it fires 13.2 to 120 MBH at just 88.6 lb, keeping the lightest chassis class in the series with 2" venting to 100 ft or 3" to 150 ft.

Natural gasPropaneHeating-only
Specifications, manuals and service
CurrentSold in Canada
Input
15–150 MBH
Output (max)
—
AFUE
95 %

The NTI Trinity TRX150 is the 95% AFUE heating-only TRX for larger homes: 15 to 150 MBH input, stepping up to 1 1/4" NPT CH connections and 115 lb, with 2" venting to 100 ft or 3" to 150 ft per side.

Natural gasPropaneHeating-only
Specifications, manuals and service
CurrentSold in Canada
Input
19.7–197 MBH
Output (max)
—
AFUE
95 %

The NTI Trinity TRX199 is the largest heating-only TRX: 19.7 to 197 MBH input on natural gas (19.2 to 192 MBH on LP) at 95% AFUE, weighing 130 lb with 1 1/4" NPT CH connections and 3" venting to 150 ft per side.

Natural gasPropaneHeating-only
Specifications, manuals and service
CurrentSold in Canada
Input
11.2–106 MBH
Output (max)
—
AFUE
95.5 %

The NTI Trinity TRX110C is the smallest TRX combi: space heating at 11.2 to 106 MBH input, 95.5% AFUE, and 2.7 GPM continuous DHW at a 77°F rise, all at 91 lb with 2" venting to 100 ft or 3" to 150 ft.

Natural gasPropaneCombi
Specifications, manuals and service
CurrentSold in Canada
Input
13.2–120 MBH
Output (max)
—
AFUE
95 %

The NTI Trinity TRX150C is the mid-size TRX combi: space heating at 13.2 to 120 MBH input and 3.5 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 92.8 lb wall-hung boiler.

Natural gasPropaneCombi
Specifications, manuals and service
CurrentSold in Canada
Input
19.7–197 MBH
Output (max)
—
AFUE
95 %

The NTI Trinity TRX199C is the flagship TRX combi: space heating at 19.7 to 197 MBH (LP 19.2 to 192 MBH) with 4.8 GPM continuous DHW at a 77°F rise, rated 95% AFUE at 135 lb with 1 1/4" NPT CH connections.

Natural gasPropaneCombi
Specifications, manuals and service

Compare models in this series

Comparison of NTI Trinity TRX085 and NTI Trinity TRX120 and NTI Trinity TRX150 and NTI Trinity TRX199 and NTI Trinity TRX110C and NTI Trinity TRX150C and NTI Trinity TRX199C
SpecificationNTI Trinity TRX085NTI Trinity TRX120NTI Trinity TRX150NTI Trinity TRX199NTI Trinity TRX110CNTI Trinity TRX150CNTI Trinity TRX199C
Input, minimum9.4 MBH13.2 MBH15 MBH19.7 MBH11.2 MBH13.2 MBH19.7 MBH
Input, maximum85 MBH120 MBH150 MBH197 MBH106 MBH120 MBH197 MBH
output-max———————
Efficiency (AFUE)96 %95 %95 %95 %95.5 %95 %95 %
Turndown ratioup to 11:1up to 11:1up to 11:1up to 11:1up to 11:1up to 11:1up to 11:1
Max. equivalent vent length, 3"150 ft150 ft150 ft150 ft150 ft150 ft150 ft
Max. equivalent vent length, 2"100 ft100 ft100 ft100 ft100 ft100 ft100 ft
Weight88.2 lb88.6 lb115 lb130 lb91 lb92.8 lb135 lb

Read the full comparison: NTI Trinity TRX085 vs TRX120 →

Read the full comparison: NTI Trinity TRX120 vs TRX150 →

Read the full comparison: NTI Trinity TRX150 vs TRX199 →

Read the full comparison: NTI Trinity TRX110C vs TRX150C →

Read the full comparison: NTI Trinity TRX150C vs TRX199C →

Read the full comparison: IBC SFC 199-1 Superflow vs NTI Trinity TRX199C →

Read the full comparison: Navien NCB-250/150H vs NTI Trinity TRX150C →

Read the full comparison: NTI Trinity TRX120 vs Weil-McLain ECO Tec 110-H →

Error codes and alerts

Trinity TRX alerts

  • 1 01TRX Series I control
  • 1 03TRX Series I control
  • 1 04TRX Series I control
  • 1 05TRX Series I control
  • 1 06TRX Series I control
  • 1 07TRX Series I control
  • 1 08TRX Series I control
  • 1 10TRX Series I control
  • 1 12TRX Series I control
  • 1 14TRX Series I control
  • 115TRX Series I control
  • 1 16TRX Series I control
  • 150TRX Series I control
  • 1 P1TRX Series I control
  • 1 P2TRX Series I control
  • 1 P3TRX Series I control
  • 201TRX Series I control
  • 2 03TRX Series I control
  • 2 05TRX Series I control
  • 2 09TRX Series I control
  • 2 P2TRX Series I control
  • 3 01TRX Series I control
  • 3 02TRX Series I control
  • 3 03TRX Series I control
  • 3 04TRX Series I control
  • 3 05TRX Series I control
  • 3 06TRX Series I control
  • 3 07TRX Series I control
  • 3 09TRX Series I control
  • 3 P9TRX Series I control
  • 4 11TRX Series I control
  • 4 12TRX Series I control
  • 4 13TRX Series I control
  • 4 30TRX Series I control
  • 4 31TRX Series I control
  • 440TRX Series I control
  • 4 41TRX Series I control
  • 5 01TRX Series I control
  • 5 02TRX Series I control
  • 5 04TRX Series I control
  • 5 P1TRX Series I control
  • 5 P2TRX Series I control
  • 5 P6TRX Series I control
  • 5 P3TRX Series I control
  • 6 02TRX Series I control
  • 6 03TRX Series I control
  • 6 05TRX Series I control
  • 6 12TRX Series I control
  • 6 19TRX Series I control
  • NOAVLTRX Series I control
  • EMERGTRX Series I control
  • CONFLTRX Series I control
  • 1 01TRX Series I control
  • 1 03TRX Series I control
  • 1 04TRX Series I control
  • 1 05TRX Series I control
  • 1 06TRX Series I control
  • 1 07TRX Series I control
  • 1 08TRX Series I control
  • 1 10TRX Series I control
  • 1 12TRX Series I control
  • 1 14TRX Series I control
  • 115TRX Series I control
  • 1 16TRX Series I control
  • 150TRX Series I control
  • 1 P1TRX Series I control
  • 1 P2TRX Series I control
  • 1 P3TRX Series I control
  • 201TRX Series I control
  • 2 03TRX Series I control
  • 2 05TRX Series I control
  • 2 09TRX Series I control
  • 2 P2TRX Series I control
  • 3 01TRX Series I control
  • 3 02TRX Series I control
  • 3 03TRX Series I control
  • 3 04TRX Series I control
  • 3 05TRX Series I control
  • 3 06TRX Series I control
  • 3 07TRX Series I control
  • 3 09TRX Series I control
  • 3 P9TRX Series I control
  • 4 11TRX Series I control
  • 4 12TRX Series I control
  • 4 13TRX Series I control
  • 4 30TRX Series I control
  • 4 31TRX Series I control
  • 440TRX Series I control
  • 4 41TRX Series I control
  • 5 01TRX Series I control
  • 5 02TRX Series I control
  • 5 04TRX Series I control
  • 5 P1TRX Series I control
  • 5 P2TRX Series I control
  • 5 P6TRX Series I control
  • 5 P3TRX Series I control
  • 6 02TRX Series I control
  • 6 03TRX Series I control
  • 6 05TRX Series I control
  • 6 12TRX Series I control
  • 6 19TRX Series I control
  • NOAVLTRX Series I control
  • EMERGTRX Series I control
  • CONFLTRX Series I control
  • 1 01TRX Series II control
  • 1 03TRX Series II control
  • 1 04TRX Series II control
  • 1 05TRX Series II control
  • 1 06TRX Series II control
  • 1 07TRX Series II control
  • 1 08TRX Series II control
  • 1 10TRX Series II control
  • 1 12TRX Series II control
  • 1 14TRX Series II control
  • 115TRX Series II control
  • 1 16TRX Series II control
  • 150TRX Series II control
  • 1 P1TRX Series II control
  • 1 P2TRX Series II control
  • 1 P3TRX Series II control
  • 201TRX Series II control
  • 2 03TRX Series II control
  • 2 05TRX Series II control
  • 2 09TRX Series II control
  • 2 P2TRX Series II control
  • 3 01TRX Series II control
  • 3 02TRX Series II control
  • 3 03TRX Series II control
  • 3 04TRX Series II control
  • 3 05TRX Series II control
  • 3 06TRX Series II control
  • 3 07TRX Series II control
  • 3 09TRX Series II control
  • 3 11TRX Series II control
  • 3 P9TRX Series II control
  • 4 11TRX Series II control
  • 4 12TRX Series II control
  • 4 13TRX Series II control
  • 4 30TRX Series II control
  • 4 31TRX Series II control
  • 440TRX Series II control
  • 4 41TRX Series II control
  • 5 01TRX Series II control
  • 5 02TRX Series II control
  • 5 04TRX Series II control
  • 5 P1TRX Series II control
  • 5 P2TRX Series II control
  • 5 P6TRX Series II control
  • 5 P3TRX Series II control
  • 6 02TRX Series II control
  • 6 03TRX Series II control
  • 6 05TRX Series II control
  • 6 12TRX Series II control
  • 6 19TRX Series II control
  • NOAVLTRX Series II control
  • EMERGTRX Series II control
  • CONFLTRX Series II control
  • 1 01TRX Series II control
  • 1 02TRX Series II control
  • 1 03TRX Series II control
  • 1 04TRX Series II control
  • 1 05TRX Series II control
  • 1 06TRX Series II control
  • 1 07TRX Series II control
  • 1 08TRX Series II control
  • 1 10TRX Series II control
  • 1 12TRX Series II control
  • 1 14TRX Series II control
  • 115TRX Series II control
  • 1 16TRX Series II control
  • 150TRX Series II control
  • 1 P1TRX Series II control
  • 1 P2TRX Series II control
  • 1 P3TRX Series II control
  • 201TRX Series II control
  • 2 03TRX Series II control
  • 2 05TRX Series II control
  • 2 09TRX Series II control
  • 2 P2TRX Series II control
  • 3 01TRX Series II control
  • 3 02TRX Series II control
  • 3 03TRX Series II control
  • 3 04TRX Series II control
  • 3 05TRX Series II control
  • 3 06TRX Series II control
  • 3 07TRX Series II control
  • 3 09TRX Series II control
  • 3 11TRX Series II control
  • 3 P9TRX Series II control
  • 4 11TRX Series II control
  • 4 12TRX Series II control
  • 4 13TRX Series II control
  • 4 30TRX Series II control
  • 4 31TRX Series II control
  • 440TRX Series II control
  • 4 41TRX Series II control
  • 5 01TRX Series II control
  • 5 02TRX Series II control
  • 5 04TRX Series II control
  • 5 P1TRX Series II control
  • 5 P2TRX Series II control
  • 5 P6TRX Series II control
  • 5 P3TRX Series II control
  • 6 02TRX Series II control
  • 6 03TRX Series II control
  • 6 05TRX Series II control
  • 6 12TRX Series II control
  • 6 19TRX Series II control
  • NOAVLTRX Series II control
  • EMERGTRX Series II control
  • CONFLTRX Series II control

Manuals

Official documents

Where ROMA provides on-site service

On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.

See all service areas

Services for NTI Boilers boilers

Related parts & service

Frequently asked questions

How does the TRX differ from the FTVN?

Both are NTI wall-hung condensing boiler families with the same model-size pattern. The TRX uses the XTRATECH large-diameter-tube stainless heat exchanger and NTI claims modulation up to 11:1, while the FTVN uses a vertical down-fired stainless exchanger rated up to 10:1. Model-level inputs, AFUE, DHW flows and venting terms are published on each series page.

Which TRX models are combis?

The TRX110C, TRX150C and TRX199C. Their continuous DHW capacity at a 77°F rise is 2.7, 3.5 and 4.8 GPM respectively per NTI's product page.

Is there a TRX Series II and how is it different?

Yes. The TRX Series II keeps the same models, inputs, AFUE and weights as Series I but replaces the interface with a new user interface and setup wizard and assigns new model codes. Each generation has its own I&O manual, and Boilers.ca documents each manual's display-code tables separately.

Talk to a boiler technician

Describe what the boiler is doing and get a straight answer about the next step.

On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.

Call 778-909-5731Request service

Related

Sources and verification

Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.

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