NTI Trinity FTG2400
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.
Key figures
- Max input
- 2,350 MBH
- Max CSA output
- —
- AFUE
- —
- Min input
- 235 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
NTI Trinity FTG2400 in practice
NTI lists the FTG2400 at 235 to 2350 MBH input — the figure behind the page's "800 MBH to 2,350 MBH" headline — with 95.2% thermal efficiency, a heating capacity of 2,237 MBH and a Net AHRI rating of 1,945 MBH. It tops the page's large FTG class at 1,710 lb with 3 in grooved water connections, a 1 1/2 in NPT male gas connection and 8 in air inlet and flue runs up to 150 ft.
The 2400 keeps the 235 MBH minimum fire of the 2000 and 2200 while adding ceiling, and its 95.2% thermal-efficiency rating is the lowest printed on the FTG table as the burner stretches across the largest fire-tube package. The FTG Installation and Operation Manual (99985422) documents the FTG600-to-2400 family, lists this class at 2,140 lb with water, and requires the 10% Canada altitude derate between 2,000 and 4,500 ft.
Best suited to
- Commercial hydronic plants whose demand calculation approaches 2,350 MBH
- Buildings wanting NTI's largest page-listed single FTG fire-tube boiler
- Plants where the plant-demand review, not spare capacity, justifies the top FTG size
Applicability and support
- Model number
- FTG2400
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
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 | 235 MBH | Per the NTI product page. |
| Input, maximum | 2,350 MBH | Per the NTI product page. |
| Output | ||
| Heating capacity | 2,237 MBH | Per the NTI product page. |
| Net AHRI rating | 1,945 MBH | Per the NTI product page. |
| Efficiency | ||
| Thermal efficiency | 95.2 % | 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 | ||
| Air inlet size | 8 in | Diameter per the NTI product page; air-inlet runs up to 150 ft. |
| Flue size | 8 in | Diameter per the NTI product page; flue runs up to 150 ft. |
| Physical and connections | ||
| Weight | 1,710 lb | Per the NTI product page; the page row is not qualified as with water. |
| Weight, with water | 2,140 lb | Per the FTG I&O manual's with-water figure for this size class; the product page prints 1,710 lb. |
| Water connections (inlet / outlet) | 3" grooved joint | Inlet and outlet per the NTI product page. |
| Gas connection | 1 1/2" NPT male | Per the NTI product page. |
| Operating limits and other | ||
| Canada altitude derate | 10% derate at 2,000–4,500 ft | Per the FTG Installation and Operation Manual. |
| Fuel | Natural gas | Input ratings per the NTI product page. |
Manuals
- FTG Installation and Operation Manual, 99985422, V.2024-06-2899985422 · 2024-06-28
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Frequently asked questions
Is the FTG2400 the largest FTG?
It is the largest FTG on NTI's product page at 2,350 MBH input. The FTG Installation and Operation Manual covers the family from the FTG600 to the FTG2400, so smaller fire-tube sizes also exist off the page's spec table.
What is the FTG2400's efficiency?
95.2% thermal efficiency per the NTI product page — the lowest figure on the page's FTG table, against 96.1% on the FTG1200.
How heavy is the FTG2400?
1,710 lb per the NTI product page; the FTG I&O manual lists the 2,000–2,400 MBH class at 2,140 lb with water.
Questions about the NTI Trinity FTG2400?
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 — FTG Series product page · accessed September 8, 2026
- FTG Installation and Operation Manual · 99985422 · accessed September 8, 2026
Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.