NTI Trinity Lx600
The NTI Trinity Lx600 fires 120 to 600 MBH at a published 94% AFUE, weighing 380 lb with 2" water connections and 4" venting to 100 ft — the largest Lx size that still vents in 4" pipe.
Key figures
- Max input
- 600 MBH
- Max CSA output
- —
- AFUE
- 94 %
- Min input
- 120 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
NTI Trinity Lx600 in practice
The Lx600 takes the Lx platform to 600 MBH on the same 4" venting used by the 300 through 600 sizes, with a 100 ft maximum run per side. It weighs 380 lb, connects on 2" NPT female water with a 1" NPT male gas connection, and shares the fire-tube heat exchanger, touchscreen cascade control and service-friendly layout of the line.
Its 120 MBH minimum fire makes it a plant boiler in practice: light-commercial buildings, larger multi-suite hydronic systems and similar loads. NTI's page prints 94% AFUE and the I&O manual rates the 500-and-up sizes by combustion (95%) and thermal (94%) efficiency, so Boilers.ca repeats both treatments rather than choosing one.
Best suited to
- Light-commercial plants with loads between 120 and 600 MBH
- Buildings wanting 600 MBH capacity while staying on 4" venting
- Multi-suite or strata hydronic systems with cascade expansion plans
Applicability and support
- Model number
- Lx600
- 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 | 120 MBH | Per the NTI product page. |
| Input, maximum | 600 MBH | Per the NTI product page. |
| Efficiency | ||
| Efficiency (AFUE) | 94 % | Product-page figure; the I&O manual rates sizes from 500 MBH by combustion (95%) and thermal (94%) efficiency rather than AFUE. |
| Domestic hot water | ||
| Domestic hot water | Heating-only; pair with an indirect tank or separate water heater | |
| Venting and air | ||
| Max. equivalent vent length | 100 ft | 4" pipe per side; maximum equivalent run per the NTI product page. |
| Physical and connections | ||
| Weight | 380 lb | Per the NTI product page. |
| Water connections | 2" NPT female | Per the NTI product page. |
| Gas connection | 1" NPT male | 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
What venting does the Lx600 need?
4" pipe to a 100 ft maximum equivalent run per side, per the NTI product page — the same venting class as the Lx300, Lx400 and Lx500.
How does the Lx600 compare with the Lx500?
Input rises from 500 to 600 MBH and weight from 320 to 380 lb; the gas connection steps from 3/4" NPT male to 1" NPT male, while water connections (2" NPT female) and 4" venting stay the same.
Is the Lx600 a combi?
No. The Lx line is heating-only; domestic hot water is produced separately, typically by a dedicated system sized to the building's demand.
Questions about the NTI Trinity Lx600?
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.
Compare and explore
- NTI Trinity Lx500 vs Lx600Comparison
- NTI Trinity Lx600 vs Lx700Comparison
- NTI Trinity Lx150Same series
- NTI Trinity Lx200Same series
- NTI Trinity Lx300Same series
- NTI Trinity Lx400Same series
- NTI Trinity Lx500Same series
- NTI Trinity Lx700Same series
- NTI Trinity Lx800Same series
- Trinity Lx series hub
- Buying guide
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.