Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
The Lx600 and Lx700 are adjacent in NTI's commercial range, but their documentation differs: the Lx600's full specification sits on the product page (120 to 600 MBH, 380 lb, 2" water connections), while the Lx700 appears in the Lx 150–800 I&O manual at 160 to 700 MBH input and is absent from the page's table.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | NTI Trinity Lx600 | NTI Trinity Lx700 |
|---|---|---|
| Input, minimum | 120 MBH | 160 MBH |
| Input, maximum | 600 MBH | 700 MBH |
| Fuel | Natural gas or propane | Natural gas or propane |
| Domestic hot water | Heating-only; pair with an indirect tank or separate water heater | Heating-only; pair with an indirect tank or separate water heater |
The Lx600 is fully specified on NTI's product page: 120 to 600 MBH input at a listed 94% AFUE, 380 lb, 2" NPT female water connections, a 1" NPT male gas connection and 4" venting to 100 ft per side. The Lx700 has no row in that table.
The Lx700's input range — 160 to 700 MBH — comes from the Lx 150–800 I&O manual (99986573), which NTI also supports with LX700 submittal and specification downloads on the same page. Boilers.ca does not print page-level figures for the 700 that NTI does not publish in the cited page extract.
Both boilers are heating-only fire-tube units in the same Lx platform with touchscreen control. The comparison that matters on site is demand: a plant load that extends past the Lx600's 600 MBH ceiling is the reason to look at the manual-documented 700, whose exact weight, connections and vent table should be taken from NTI's own submittal documents.
NTI Boilers
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.
NTI Boilers
The NTI Trinity Lx700 fires 160 to 700 MBH and appears in the Lx 150–800 I&O manual even though the product page's spec table omits it. NTI still publishes its submittal and specification downloads, making it the documented bridge between the 600 and the 800.
NTI's Lx page table jumps from the Lx600 to the Lx800. The Lx700 (160 to 700 MBH) is documented in the Lx 150–800 I&O manual, and NTI lists its submittal and specification downloads on the page.
The manual lists the Lx700 at 160 to 700 MBH, against the Lx600's published 120 to 600 MBH — a 100 MBH higher ceiling and a 40 MBH higher minimum fire.
From the plant-demand calculation: loads above the Lx600's 600 MBH ceiling point to the Lx700, whose connection and venting details should be confirmed from NTI's LX700 submittal.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.