Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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NTI Boilers is a Canadian gas boiler manufacturer founded in 1967, with its head office and manufacturing facility on the Drury Cove in Saint John, New Brunswick. Its current residential and light-commercial lines include the TFTN, FTVN, TRX, NTI Compass and Trinity Lx, all documented on Boilers.ca with verified specifications.
At a glance
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.
NTI was founded in 1967 and has built its 'North American-made' reputation from a head office and manufacturing facility located on the Drury Cove in Saint John, New Brunswick. Its installation and operation manuals print a Saint John address (30 Stonegate Dr, Saint John, NB) and a North American technical-assistance line, and the same site serves the Canadian and United States markets with Canadian provisions written into the manuals.
The current product line documented on Boilers.ca covers NTI's residential wall-hung and floor-standing condensing boilers: the flagship TFTN (wall-hung 085–399 and floor-mounted 500–850 sizes), the FTVN (Series I and Series II, heating-only and combi), the TRX (Series I and Series II, heating-only and combi), the floor-standing NTI Compass, and the Trinity Lx fire-tube line for light-to-heavy commercial work, which NTI also lists in its smaller sizes for residential use. The Trinity Ti, Tx, TFT, FTV and Vmax series are discontinued, as listed on ntiboilers.com/discontinued.
NTI controls display numeric error codes grouped by circuit: the first digit names the system area, from 1 (primary / central heat) through 2 (domestic hot water), 3 (internal electronics), 4 (external electronics), 5 (ignition and detection), 6 (air and flue) and 7 (multi-zone). Boilers.ca documents the code tables per manual generation so a homeowner can report the exact code shown on the display.
Series
Each series hub lists its models, verified specifications, manuals and documented alerts.
The Trinity FTVN is NTI's wall-hung residential condensing boiler family, sold in heating-only and combi versions from 85 to 199 MBH. Series I and Series II share the same hardware family; Series II adds a new user interface and its own model codes, and both generations' display codes are documented on Boilers.ca.
The Trinity TRX is NTI's wall-hung residential condensing boiler line built around the XTRATECH stainless steel heat exchanger with large-diameter tubing. It runs from the TRX085 to the TRX199, plus the TRX110C, TRX150C and TRX199C combis, and is sold as Series I and Series II with the same ratings and a new user interface on the Series II.
The Trinity TFTN is NTI's next-generation flagship boiler line: wall-hung condensing models from the TFTN085 to the TFTN399 with a full-colour touchscreen, built-in Wi-Fi, low-water cut-off and zone control, with floor-mounted TFTN500–850 sizes in the same family. Boilers.ca documents the wall-hung 085–399 and the floor-mounted 500–850 sizes as model records.
The NTI Compass is a floor-standing residential condensing boiler line — NC085 through NC199 plus the NC110C, NC150C and NC199C combis — built as a floor cabinet around the FTVN-class control and electronics, with NTI marketing a limited lifetime heat-exchanger warranty.
The Trinity Lx is NTI's fire-tube condensing line for light-to-heavy commercial applications, also listed in its smaller sizes for residential use: Lx150 through Lx800 (plus the Lx700, which appears in the I&O manual but not the product page table), from 25 to 800 MBH input with easy-to-clean stainless steel heat exchangers.
The Trinity Ti was NTI's earlier-generation wall-hung residential condensing boiler series in the Ti100–Ti200 size range. NTI lists it as discontinued, and the Ti100–200 installation and operation manual (doc 82419) remains publicly hosted for owners and technicians.
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.
The Trinity TFT was NTI's wall-hung condensing boiler line for residential and light-commercial work, spanning the TFT60 through TFT399 with a stainless steel down-fired fire-tube heat exchanger. NTI lists the TFT as discontinued; the platform carried over into the current TFTN flagship line, and every size is now documented here from the 99984535 I&O manual's rating table.
The Trinity FTV was NTI's wall-hung combi series with a vertical fire-tube stainless steel heat exchanger, sold as the FTV110C, FTV150C and FTV190C with DHW flows of 2.7, 3.6 and 4.5 GPM at a 77°F rise. NTI lists the FTV as discontinued.
The Trinity Vmax was NTI's wall-hung condensing boiler series built around a down-fired fire-tube stainless steel heat exchanger with a built-in primary loop and pump and dedicated indirect-tank connections. NTI lists the Vmax — VM110 and VM153 heat-only versions plus VM110P and VM153P Vmax Plus — as discontinued.
The Trinity FTG is NTI's stainless steel high-efficiency fire-tube boiler series for demanding commercial applications. The product page lists the FTG1200 through FTG2400 (120–1200 to 235–2350 MBH input at 96.1% to 95.2% thermal efficiency), while the FTG Installation and Operation Manual documents the complete FTG600 to FTG2400 family — including the FTG600 and FTG800, now covered with their own model pages.
The Green Furnace line merges an NTI condensing combi boiler with a high-efficiency air handler for forced-air heating, hydronic heating and domestic hot water in one cabinet: the GF200 at 19,900-199,000 BTU/hr DHW input and 97% AFUE, and the GF150 at 13,200-150,000 BTU/hr DHW input and 95% AFUE.
Models
NTI Boilers
The NTI Trinity FTVN085 is the entry point of the FTVN wall-hung condensing family: 8.5 to 85 MBH input at 96% AFUE — the only FTVN rated 96% — in a 107 lb heating-only boiler that also accepts 2" venting to 100 ft for retrofit-friendly runs.
NTI Boilers
The NTI Trinity FTVN110 is the 95% AFUE mid-size heating-only member of the FTVN wall-hung family, firing 11 to 110 MBH in the same 107 lb cabinet as the FTVN085, with 2" venting to 100 ft or 3" to 150 ft per side.
NTI Boilers
The NTI Trinity FTVN150 is the 95% AFUE heating-only FTVN for homes between the 110 and 199 sizes: it fires 15 to 150 MBH, weighs 122 lb, and keeps 2" venting to 100 ft or 3" to 150 ft per side.
NTI Boilers
The NTI Trinity FTVN199 is the largest heating-only FTVN: 19.9 to 199 MBH input at 95% AFUE in a 139.5 lb wall-hung boiler. Its 2" venting terms follow NTI technical bulletin 2022-10-26, so most installations run 3" to the 150 ft limit.
NTI Boilers
The NTI Trinity FTVN110C is the smallest FTVN combi: it heats at 11 to 110 MBH input and delivers 2.7 GPM of continuous domestic hot water at a 77°F rise, all in the same 107 lb wall-hung cabinet as the heating-only FTVN110.
NTI Boilers
The NTI Trinity FTVN150C is the mid-size FTVN combi: space heating from 15 to 150 MBH input plus 3.6 GPM of continuous DHW at a 77°F rise, at 95% AFUE, in a 128.5 lb wall-hung unit.
NTI Boilers
The NTI Trinity FTVN199C is the largest FTVN combi: heating at 19.9 to 199 MBH input with 4.8 GPM continuous DHW at a 77°F rise, rated 95% AFUE. Its 2" venting terms follow NTI technical bulletin 2022-10-26, so plan on 3" pipe.
NTI Boilers
The NTI Trinity TRX085 is the entry TRX wall-hung condensing boiler: 9.4 to 85 MBH input, the only TRX rated 96% AFUE, at just 88.2 lb, with 2" venting to 100 ft or 3" to 150 ft per side.
NTI Boilers
The NTI Trinity TRX120 is the 95% AFUE heating-only TRX between the 85 and the 150: it fires 13.2 to 120 MBH at just 88.6 lb, keeping the lightest chassis class in the series with 2" venting to 100 ft or 3" to 150 ft.
NTI Boilers
The NTI Trinity TRX150 is the 95% AFUE heating-only TRX for larger homes: 15 to 150 MBH input, stepping up to 1 1/4" NPT CH connections and 115 lb, with 2" venting to 100 ft or 3" to 150 ft per side.
NTI Boilers
The NTI Trinity TRX199 is the largest heating-only TRX: 19.7 to 197 MBH input on natural gas (19.2 to 192 MBH on LP) at 95% AFUE, weighing 130 lb with 1 1/4" NPT CH connections and 3" venting to 150 ft per side.
NTI Boilers
The NTI Trinity TRX110C is the smallest TRX combi: space heating at 11.2 to 106 MBH input, 95.5% AFUE, and 2.7 GPM continuous DHW at a 77°F rise, all at 91 lb with 2" venting to 100 ft or 3" to 150 ft.
NTI Boilers
The NTI Trinity TRX150C is the mid-size TRX combi: space heating at 13.2 to 120 MBH input and 3.5 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 92.8 lb wall-hung boiler.
NTI Boilers
The NTI Trinity TRX199C is the flagship TRX combi: space heating at 19.7 to 197 MBH (LP 19.2 to 192 MBH) with 4.8 GPM continuous DHW at a 77°F rise, rated 95% AFUE at 135 lb with 1 1/4" NPT CH connections.
NTI Boilers
The NTI Trinity TFTN085 is the smallest wall-hung TFTN: 8.5 to 85 MBH input, the only TFTN wall model rated 96% AFUE, weighing 107 lb with water and standing 34 1/8 inches tall with a 2" venting option to 100 ft.
NTI Boilers
The NTI Trinity TFTN110 is the 95% AFUE wall-hung TFTN between the 085 and the 150: 11 to 110 MBH input in the same 107 lb cabinet as the TFTN085, with 2" venting to 100 ft or 3" to 150 ft.
NTI Boilers
The NTI Trinity TFTN150 is the 95% AFUE wall-hung TFTN for mid-to-larger homes: 15 to 150 MBH input, 122 lb with water, on 1 1/4" NPT CH connections with 2" venting to 100 ft or 3" to 150 ft.
NTI Boilers
The NTI Trinity TFTN199 is the 95% AFUE wall-hung TFTN at the classic 199 MBH mark: 19.9 to 199 MBH input, 140 lb with water, still on 1 1/4" NPT CH connections with 2" venting to 100 ft or 3" to 150 ft.
NTI Boilers
The NTI Trinity TFTN285 is the 95% AFUE wall-hung TFTN for big houses and light-commercial plants: 28.5 to 285 MBH input, 180 lb with water, in a wider 21 3/8 inch cabinet with 3"-only venting to 150 ft.
NTI Boilers
The NTI Trinity TFTN340 is the first of the two largest TFTN wall models: 39.9 to 340 MBH input, rated 95.4% thermal efficiency rather than AFUE, at 250 lb with water in a 25 1/4 inch-wide cabinet with 4" venting to 150 ft.
NTI Boilers
The NTI Trinity TFTN399 is the largest TFTN wall model: 39.9 to 399 MBH input at 95.4% thermal efficiency, 250 lb with water, on 1 1/2" NPT CH connections with 4" venting to 150 ft — the wall-hung option NTI positions against its floor-mounted 500–850 sizes.
NTI Boilers
The NTI Trinity TFTN500 is the smallest floor-mounted TFTN: 50 to 500 MBH input at 98% thermal efficiency, with a 489 MBH heating capacity and a 425 MBH Net AHRI rating, weighing 575 lb with water on 2" NPT water connections with 4" venting to 150 ft.
NTI Boilers
The NTI Trinity TFTN600 lifts the floor-mounted TFTN to a 600 MBH ceiling: 60 to 600 MBH input at 97.8% thermal efficiency, a 585 MBH heating capacity and a 509 MBH Net AHRI rating, sharing the 575 lb with-water weight and 2" water connections of the TFTN500.
NTI Boilers
The NTI Trinity TFTN725 is the second-largest floor-mounted TFTN: 72.5 to 725 MBH input at 97.7% thermal efficiency, a 705 MBH heating capacity and a 613 MBH Net AHRI rating, stepping to 685 lb with water, 2 1/2" NPT water connections and 6" venting.
NTI Boilers
The NTI Trinity TFTN850 is the largest floor-mounted TFTN: 85 to 850 MBH input at 97.6% thermal efficiency, with an 825 MBH heating capacity and a 717 MBH Net AHRI rating, weighing 690 lb with water on 2 1/2" NPT water connections with 6" venting.
NTI Boilers
The NTI Compass NC085 is the smallest floor-standing Compass: 8.5 to 85 MBH input, the only Compass rated 96% AFUE, in a 193 lb floor cabinet designed to drop into an existing boiler footprint.
NTI Boilers
The NTI Compass NC110 is the 95% AFUE floor-standing Compass at 11 to 110 MBH input — the same 193 lb cabinet as the NC085 with 25 MBH more ceiling for detached homes with an indirect tank.
NTI Boilers
The NTI Compass NC150 is the 95% AFUE floor-standing Compass for mid-to-larger homes: 15 to 150 MBH input in a 203 lb floor cabinet with the platform's reversible connections and integrated pump package.
NTI Boilers
The NTI Compass NC199 is the largest heating-only Compass: 19.9 to 199 MBH input at 95% AFUE in a 214 lb floor cabinet — the floor-standing option for large homes that would otherwise need a wall-hung 199.
NTI Boilers
The NTI Compass NC110C is the smallest floor-standing Compass combi: space heating at 11 to 110 MBH input plus 2.7 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 194 lb floor cabinet.
NTI Boilers
The NTI Compass NC150C is the mid-size floor-standing Compass combi: space heating from 15 to 150 MBH input plus 3.6 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 204 lb floor cabinet.
NTI Boilers
The NTI Compass NC199C is the flagship floor-standing Compass combi: space heating at 19.9 to 199 MBH input with 4.8 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 215 lb floor cabinet.
NTI Boilers
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.
NTI Boilers
The NTI Trinity Lx200 stretches the Lx entry class to 199 MBH: 25 to 199 MBH input at 93.5% AFUE in a 125 lb floor-standing boiler with a wall-hung kit included, on 3" venting to 105 ft.
NTI Boilers
The NTI Trinity Lx300 is the 93.7% AFUE step of the Lx line: 55 to 275 MBH input in a 180 lb floor-standing boiler, stepping up to 4" venting at 100 ft with 1 1/4" NPT water connections.
NTI Boilers
The NTI Trinity Lx400 is the last Lx size NTI's page lists for residential-capable use: 75 to 399 MBH input at 94% AFUE in a 225 lb floor-standing boiler (wall-hung kit included) with 4" venting to 100 ft.
NTI Boilers
The NTI Trinity Lx500 is the entry of the pure-commercial Lx class: 100 to 500 MBH input at a published 94% AFUE, in a 320 lb floor-standing boiler with 2" water connections and 4" venting to 100 ft.
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 Boilers
The NTI Trinity Lx800 is the largest Lx fire-tube boiler: 160 to 800 MBH input at a published 94% AFUE, weighing 475 lb with 2" water connections and 6" venting to 100 ft per side.
NTI Boilers
The NTI Trinity FTG600 is the smallest fire-tube boiler in the FTG family as the Installation and Operation Manual documents it: 80 to 600 MBH input at 96% thermal efficiency, with a 576 MBH heating capacity and a 500 MBH Net I=B=R rating.
NTI Boilers
The NTI Trinity FTG800 is the second-smallest documented FTG fire-tube boiler: 80 to 800 MBH input at 95% thermal efficiency, with a 760 MBH heating capacity and a 660 MBH Net I=B=R rating.
NTI Boilers
The NTI Trinity FTG1200 is the entry size of the FTG commercial fire-tube line as NTI's page lists it: 120 to 1200 MBH input at 96.1% thermal efficiency, with a 1,153 MBH heating capacity and a 1,003 MBH Net AHRI rating.
NTI Boilers
The NTI Trinity FTG1400 lifts the FTG page's entry class to a 1,400 MBH ceiling: 140 to 1400 MBH input at 96% thermal efficiency, with a 1,344 MBH heating capacity and a 1,169 MBH Net AHRI rating.
NTI Boilers
The NTI Trinity FTG2000 is the entry of the 2,000 MBH-class FTG fire-tube boilers: 235 to 2000 MBH input at 96% thermal efficiency, with a 1,920 MBH heating capacity and a 1,670 MBH Net AHRI rating on a 1 1/2" NPT male gas connection.
NTI Boilers
The NTI Trinity FTG2200 fires 235 to 2200 MBH at 95.6% thermal efficiency with a 2,103 MBH heating capacity and a 1,829 MBH Net AHRI rating — the mid step of NTI's 2,000 MBH-class FTG fire-tube boilers at 1,710 lb.
NTI Boilers
The NTI Trinity FTG2400 is the largest FTG on NTI's product page: 235 to 2350 MBH input at 95.2% thermal efficiency, with a 2,237 MBH heating capacity and a 1,945 MBH Net AHRI rating.
NTI Boilers
The NTI Trinity TFT60 is a discontinued wall-hung fire-tube condensing boiler: 17–60 MBH input with a 56 MBH heating capacity, a 48 MBH Net I=B=R rating and 95% AFUE per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT85 is a discontinued wall-hung fire-tube condensing boiler: 17–85 MBH input with a 78 MBH heating capacity, a 68 MBH Net I=B=R rating and 95% AFUE per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT110 is a discontinued wall-hung fire-tube condensing boiler: 21.6–108 MBH input with a 99 MBH heating capacity, a 86 MBH Net I=B=R rating and 95% AFUE per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT154 is a discontinued wall-hung fire-tube condensing boiler: 15.4–154 MBH input with a 141 MBH heating capacity, a 122 MBH Net I=B=R rating and 95% AFUE per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT201 is a discontinued wall-hung fire-tube condensing boiler: 20–200 MBH input with a 185 MBH heating capacity, a 160 MBH Net I=B=R rating and 95% AFUE per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT285 is a discontinued wall-hung fire-tube condensing boiler: 28.5–285 MBH input with a 263 MBH heating capacity, a 228 MBH Net I=B=R rating and 95% AFUE per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT340 is a discontinued wall-hung fire-tube condensing boiler: 39.9–340 MBH input with a 324 MBH heating capacity, a 282 MBH Net I=B=R rating and 95.4% thermal efficiency (AFUE not applicable) per the TFT I&O manual (99984535).
NTI Boilers
The NTI Trinity TFT399 is a discontinued wall-hung fire-tube condensing boiler: 39.9–399 MBH input with a 380 MBH heating capacity, a 330 MBH Net I=B=R rating and 95.4% thermal efficiency (AFUE not applicable) per the TFT I&O manual (99984535).
NTI Boilers
The NTI GF 200 is a combi-furnace with 19,900-80,000 BTU/hr space-heating input, 19,900-199,000 BTU/hr DHW input, 97% AFUE and a 0.97 DHW energy factor, delivering up to 7.8 gpm at a 50°F rise from an internal recirculation and buffer tank.
NTI Boilers
The NTI GF150 is a combi-furnace with 13,200-120,000 BTU/hr space-heating capacity, 13,200-150,000 BTU/hr DHW capacity, 95% AFUE, up to 3 tons of cooling and 3.6 gpm of domestic hot water at a 77°F rise.
Services
On-site service in Greater Vancouver. Brand and model context is kept when you request service.
Error codes and alerts
Documented meanings resolved against the specific series, controller and manual version. A code is not a diagnosis.
Manuals and documents
Links go to the manufacturer's own documents. Boilers.ca does not reproduce manuals.
Yes. NTI was founded in 1967 and its about page says its head office and manufacturing facility sit on the Drury Cove in Saint John, New Brunswick. The installation and operation manuals print an NTI Boilers Inc. address in Saint John, NB with a Canadian technical-assistance number.
NTI's current product pages cover the TFTN (085–850), FTVN Series I and Series II, TRX Series I and Series II, the floor-standing NTI Compass and the Trinity Lx. The Trinity Ti, Tx, TFT, FTV and Vmax series are listed as discontinued on ntiboilers.com/discontinued.
NTI groups its numeric codes by circuit: 1 is the primary (central heat) circuit, 2 the DHW circuit, 3 internal electronics, 4 external electronics, 5 ignition and detection, 6 air and flue, and 7 multi-zone. Boilers.ca documents the full code tables from each manual generation, so check the code against the manual that matches your unit before calling for service.
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
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.