NTI Trinity Lx150
The NTI Trinity Lx150 is the entry size of the Lx fire-tube line: 25 to 150 MBH input on natural gas (145 MBH maximum on LP) at 93.5% AFUE, in a 100 lb floor-standing unit that can also use the wall-hung kits NTI includes for the Lx200–400.
Key figures
- Max input
- 150 MBH
- Max CSA output
- —
- AFUE
- 93.5 %
- Min input
- 25 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
NTI Trinity Lx150 in practice
The Lx150 is the smallest Trinity Lx and the residential-friendly end of NTI's fire-tube range, firing 25 to 150 MBH on natural gas with the LP maximum capped at 145 MBH. NTI rates it 93.5% AFUE on the product page, it weighs 100 lb, and its 3" venting runs to 105 ft on natural gas but only 50 ft on LP.
For a larger BC home or small commercial space whose heat-loss calculation sits above the residential wall-hung class, the Lx150 is the lightest entry into the Lx line. The trade-offs to plan around are its floor-standing footprint (or wall-hung kit, which NTI includes for the Lx200–400 range) and the shorter LP vent run, which matters for propane-heated buildings.
Best suited to
- Larger homes and light-commercial spaces with loads above 150 MBH-class wall boilers
- Projects wanting the easy-to-clean Lx fire-tube heat exchanger at the smallest size
- NG installations able to run 3" venting up to 105 ft per side
Applicability and support
- Model number
- Lx150
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
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.
Specifications
Published specifications
Values as published by NTI Boilers. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, minimum | 25 MBH | Per the NTI product page. |
| Input, maximum | 150 MBH | Natural gas. The LP maximum is 145 MBH per the NTI product page. |
| Efficiency | ||
| Efficiency (AFUE) | 93.5 % | Per the NTI product page. |
| Domestic hot water | ||
| Domestic hot water | Heating-only; pair with an indirect tank or separate water heater | |
| Venting and air | ||
| Max. equivalent vent length | 105 ft (NG), 50 ft (LP) | 3" pipe per side; maximum equivalent run per the NTI product page. |
| Physical and connections | ||
| Weight | 100 lb | Per the NTI product page. |
| Water connections | 1" NPT female | Per the NTI product page. |
| Gas connection | 1/2" NPT female | Per the NTI product page. |
| Operating limits and other | ||
| Fuel | Natural gas or propane | NTI publishes LP conversion instructions for this series. |
Manuals
- Trinity Lx 150–800 I&O Manual, 99986573, V.2024-06-2899986573 · 2024-06-28
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Frequently asked questions
Can the Lx150 run on propane?
Yes, but NTI caps the LP input at 145 MBH (against 150 MBH on natural gas) and limits the 3" LP vent run to 50 ft instead of 105 ft.
Is the Lx150 wall-hung?
It is a floor-standing boiler. NTI's page introduction says sizes up to 399 MBH can also be mounted wall-hung, and the features list says the wall-hung kit is included for the Lx200–400.
What is the Lx150's efficiency?
93.5% AFUE per the NTI product page, the same figure NTI publishes for the Lx200.
Questions about the NTI Trinity Lx150?
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 — Trinity Lx Series product page · accessed September 7, 2026
- Trinity Lx 150–800 I&O Manual, 99986573, V.2024-06-28 · 99986573 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.