NTI Boilers · Series
NTI Boilers Trinity Tx (discontinued)
The Trinity Tx was NTI's wall-hung stainless steel heating boiler series whose combi models — the Tx151C and Tx200C — delivered 95% AFUE with DHW flow of 3.5 and 4.6 GPM at a 77°F rise. NTI lists the Tx as discontinued; the page's spec table remains public for owners.
Series facts
- Type
- combi
- Efficiency
- 95% AFUE
- Fuel
- Natural gas or propane; the discontinued Tx page documents NG and LP operation.
- Venting
- Unknown
- Models documented
- 0
- Warranty
- Not verified
95% AFUE on both Tx combi models, per the discontinued Tx product page.
About the Trinity Tx (discontinued)
The discontinued Tx page shows a combi and a heating-only branch. The combi models Tx151C and Tx200C fired to 151 and 199 MBH on the DHW side (18.9–151 and 24.9–199 MBH) with heating input capped at 80 and 120 MBH, rated 95% AFUE, with DHW flow of 3.5 and 4.6 GPM at a 77°F temperature rise. Heating-only Tx51 through Tx200 models shared the family's easy-to-clean stainless heat exchanger.
The Tx page highlights easy programming, quick-connect components and universal vent connections with an embedded test port, with venting in PVC, CPVC or polypropylene. NTI now lists the Tx under Discontinued; owners and technicians can still read the published specs on the product page, while the series I&O manual (doc 84874) was not extracted for this record.
Highlights
- Wall-hung stainless steel boiler line, combi and heating-only branches
- Tx151C / Tx200C combis: 95% AFUE, DHW flow 3.5 / 4.6 GPM at a 77°F rise
- Heating-side input capped below the DHW input on the combis
- Listed as discontinued on ntiboilers.com/discontinued
Models
Trinity Tx (discontinued) models
One canonical page per model with input, output and efficiency kept separate.
Error codes and alerts
Trinity Tx (discontinued) alerts
No alerts documented for this series yet.
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.
Services for NTI Boilers boilers
Frequently asked questions
Was the Trinity Tx a combi boiler?
The Tx series had both: the Tx151C and Tx200C combi models provided DHW at 3.5 and 4.6 GPM (77°F rise), while the Tx51–Tx200 heating-only models heated rooms only.
Can I still get documentation for a Trinity Tx?
The discontinued Tx product page on ntiboilers.com keeps the published specifications. The series I&O manual was not extracted for this record, so Boilers.ca cites the product page.
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.
Sources and verification
- NTI — Tx Series (Discontinued) · accessed September 7, 2026
- NTI — Discontinued · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.