Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Lochinvar · Series
The FTXL is Lochinvar's commercial fire-tube condensing boiler, spanning FTX400 to FTX1000 (399,000 to 999,000 BTU/hr) with a stainless steel fire-tube heat exchanger, per-model submittal thermal efficiencies from 97.0% to 98.3% and the SMART TOUCH control.
Series facts
The FTXL Fire Tube Boiler is Lochinvar's floor-standing commercial condensing fire-tube line, bringing the stainless steel fire-tube design to light commercial loads: the FTX400N page describes models from 399,000 to 999,000 BTU/hr with the 7" SMART TOUCH touchscreen, CON·X·US remote connectivity, 10:1 turndown on the 400 and 500 sizes and flow rates from 10 to 105 GPM. The FTXL submittal prints per-model thermal efficiencies of 98.0% (FTX400), 97.7% (FTX500), 97.5% (FTX600), 97.2% (FTX725), 97.0% (FTX850) and 98.3% (FTX1000) — Boilers.ca quotes these per-model submittal figures rather than the 98.3% line-wide claim in Lochinvar's 2024 press release, which the per-model documents contradict.
The I&O manual (Rev G, covering Models 400-850 Series 120 and 1000 Series 110) prints the ratings table reproduced on each FTXL model page: minimum and maximum inputs, gross output, AHRI net water rating, water content, water and gas connections and air-inlet and vent sizes. Turndown per the submittal is 10:1 on the FTX400, FTX500 and FTX1000 and 7:1 on the FTX600, FTX725 and FTX850, matching the minimum inputs in the rating table. The product page marks the line ENERGY STAR certified with an ASME H stamp, the FTX400N page prints a 10-year heat exchanger warranty, Lochinvar's Canada English pages are identical to the United States pages, and the fire-tube design is suited to variable-primary systems per the 2024 newsroom.
Highlights
The FTXL FTX400N product page prints a 10-year limited heat exchanger warranty and a 1-year limited parts warranty.
Models
One canonical page per model with input, output and efficiency kept separate.
Lochinvar
The FTXL FTX400 is the entry commercial FTXL: 39.9 to 399 MBH input with 391 MBH gross output and a 340 MBH AHRI net rating at 98.0% submittal thermal efficiency, with 10:1 turndown.
Lochinvar
The FTXL FTX500 fires 50 to 500 MBH with 489 MBH gross output and a 425 MBH AHRI net rating at 97.7% submittal thermal efficiency, keeping 2" water connections and 4" venting.
Lochinvar
The FTXL FTX600 reaches 85.7 to 600 MBH input with 585 MBH gross output and a 509 MBH AHRI net rating at 97.5% submittal thermal efficiency, with 7:1 turndown.
Lochinvar
The FTXL FTX725 fires 103.6 to 725 MBH with 705 MBH gross output and a 613 MBH AHRI net rating at 97.2% submittal thermal efficiency, stepping to 2-1/2" water connections and a 6" vent.
Lochinvar
The FTXL FTX850 fires 121.4 to 850 MBH with 825 MBH gross output and a 717 MBH AHRI net rating at 97.0% submittal thermal efficiency, on 2-1/2" water connections with 6" venting.
Lochinvar
The FTXL FTX1000 tops the FTXL line at 100 to 1000 MBH input with 982 MBH gross output and an 854 MBH AHRI net rating at 98.3% submittal thermal efficiency — the "FTXL 1.0" 999,000 model.
| Specification | Lochinvar FTXL FTX400 | Lochinvar FTXL FTX500 | Lochinvar FTXL FTX600 | Lochinvar FTXL FTX725 | Lochinvar FTXL FTX850 | Lochinvar FTXL FTX1000 |
|---|---|---|---|---|---|---|
| Heating input, minimum | 39.9 MBH | 50 MBH | 85.7 MBH | 103.6 MBH | 121.4 MBH | 100 MBH |
| Heating input, maximum | 399 MBH | 500 MBH | 600 MBH | 725 MBH | 850 MBH | 1,000 MBH |
| output-max | — | — | — | — | — | — |
| afue | — | — | — | — | — | — |
| turndown | — | — | — | — | — | — |
| vent-max-3 | — | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — | — |
| Shipping weight | 478 lb | 504 lb | 504 lb | 575 lb | 604 lb | 670 lb |
Read the full comparison: Lochinvar FTXL FTX400 vs FTX500 →
Read the full comparison: Lochinvar FTXL FTX500 vs FTX600 →
Read the full comparison: Lochinvar FTXL FTX600 vs FTX725 →
Read the full comparison: Lochinvar FTXL FTX725 vs FTX850 →
Read the full comparison: Lochinvar FTXL FTX850 vs FTX1000 →
Error codes and alerts
Manuals
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 Lochinvar boilers
The FTXL submittal prints per-model thermal efficiencies of 98.0% (FTX400), 97.7% (FTX500), 97.5% (FTX600), 97.2% (FTX725), 97.0% (FTX850) and 98.3% (FTX1000). Lochinvar's 2024 press release claims 98.3% for the whole line, but the per-model documents contradict that, so Boilers.ca uses the submittal figures.
The FTXL submittal lists 10:1 turndown on the FTX400, FTX500 and FTX1000 and 7:1 on the FTX600, FTX725 and FTX850 — consistent with the minimum inputs in the I&O ratings table.
Lochinvar's Canada English (en_CA) FTXL product pages are identical to the United States pages, matching the pattern of the rest of the brand's line documented on Boilers.ca.
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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 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.