Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The FTG2200 and FTG2400 are the two largest FTG sizes on NTI's product page and share the same class: 1,710 lb (2,140 lb with water per the I&O manual), a 1 1/2" NPT male gas connection, 3" grooved water connections and the 235 MBH minimum fire. The 2400 fires to 2,350 MBH — the figure behind the page's headline range — with a 2,237 MBH heating capacity and a 1,945 MBH Net AHRI rating, at 95.2% thermal efficiency against the 2200's 95.6%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | NTI Trinity FTG2200 | NTI Trinity FTG2400 |
|---|---|---|
| Input, minimum | 235 MBH | 235 MBH |
| Input, maximum | 2,200 MBH | 2,350 MBH |
| Thermal efficiency | 95.6 % | 95.2 % |
| Heating capacity | 2,103 MBH | 2,237 MBH |
| Net AHRI rating | 1,829 MBH | 1,945 MBH |
| Weight | 1,710 lb | 1,710 lb |
| Weight, with water | 2,140 lb | 2,140 lb |
| Water connections (inlet / outlet) | 3" grooved joint | 3" grooved joint |
| Gas connection | 1 1/2" NPT male | 1 1/2" NPT male |
| Air inlet size | 8 in | 8 in |
| Flue size | 8 in | 8 in |
| Canada altitude derate | 10% derate at 2,000–4,500 ft | 10% derate at 2,000–4,500 ft |
| 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 |
Both boilers fire from a 235 MBH minimum on the same large FTG class: 1,710 lb on the product page (2,140 lb with water per the I&O manual), a 1 1/2 in NPT male gas connection, 3 in grooved water connections and 8 in air inlet and flue runs to 150 ft.
The FTG2200 runs 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 FTG2400 runs 235 to 2350 MBH — the top of NTI's "800 MBH to 2,350 MBH" marketing range — at 95.2% thermal efficiency with a 2,237 MBH heating capacity and a 1,945 MBH Net AHRI rating.
With identical minimum fire, weight and connections, the 2400's extra 150 MBH of ceiling costs 0.4 points of efficiency and nothing physical. Both are heating-only plant boilers under the FTG I&O manual's 10% Canada altitude derate, and the model choice follows the plant-demand calculation rather than spare-capacity thinking.
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.
Input rises from 235–2200 to 235–2350 MBH, heating capacity from 2,103 to 2,237 MBH and the Net AHRI rating from 1,829 to 1,945 MBH; thermal efficiency eases from 95.6% to 95.2%. Weight, connections and venting are identical.
It is the largest FTG on NTI's product page at 2,350 MBH input — the figure behind the page's headline range. The FTG I&O manual's coverage extends down to the FTG600, which the page does not list.
Yes — both are 1,710 lb on the product page, with the I&O manual listing the class at 2,140 lb with water.
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 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.