NTI Trinity TFTN285
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.
Key figures
- Max input
- 285 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 28.5 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
NTI Trinity TFTN285 in practice
The TFTN285 crosses from pure residential territory into NTI's light-commercial envelope: 28.5 to 285 MBH input on a wider 21 3/8 inch cabinet, 34 1/8 inches tall and 18 3/8 inches deep, weighing 180 lb with water. NTI lists it at 95% AFUE, still on 1 1/4" NPT CH connections and 3/4" NPT gas.
Venting is where this model simplifies planning decisions: the 2" option disappears and NTI lists 3" venting only, to 150 ft each side. Its 28.5 MBH minimum fire is well above the smaller TFTN models, so the correct audience is a building whose calculated load sits high — a large home with several zones, or a small commercial space — rather than an average detached house.
Best suited to
- Large houses and small light-commercial plants with high heat loss
- Buildings whose load calculation lands between the 199 and 285 sizes
- Mechanical rooms that can run 3" venting within 150 ft
Applicability and support
- Model number
- TFTN285
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
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 | 28.5 MBH | Per the NTI product page. |
| Input, maximum | 285 MBH | Per the NTI product page. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 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 | ||
| Max. equivalent vent length | 150 ft | 3" only; up to 150 ft each per the NTI product page (no 2" option on the TFTN285). |
| Physical and connections | ||
| Weight | 180 lb | With water, per the NTI product page. |
| CH water connections | 1 1/4" NPT | Male NPT per the NTI product page. |
| Gas connection | 3/4" NPT | Male NPT per the NTI product page. |
| Width | 21.375 in | Per the TFTN I&O manual, Table 2-1. |
| Height | 34.125 in | Per the TFTN I&O manual, Table 2-1. |
| Depth | 18.375 in | Per the TFTN I&O manual, Table 2-1. |
| Operating limits and other | ||
| Fuel | Natural gas or propane | NTI publishes LP conversion instructions for this series. |
Manuals
- TFTN 085–399 I&O Manual, 99987137, V.2025-04-24 (HMI R30)99987137 · 2025-04-24
- TFTN 500–850 I&O Manual, 99987545, V.2025-04-2499987545 · 2025-04-24
Alerts documented for this model
- 101 1
- 102
- 103 1
- 104 1
- 105 1
- 106 1
- 109
- 110 1
- 112 1
- 113
- 114
- 115
- 117 1
- 118 1
- 150
- 1P1 1
- 1P2 1
- 1P3 1
- 1P4
- 203
- 209
- 2P2
- 303
- 304
- 306
- 309
- 3P9
- 411
- 412
- 413
- 441
- 460
- 501 1
- 502
- 504 1
- 5P1
- 5P2
- 5P6
- 5P3
- 5P5
- 602
- 603 1
- 605
- 608
- 612 1
- 730
- Unconfigured
- Conflict
- 101 1
- 102
- 103 1
- 104 1
- 105 1
- 106 1
- 109
- 110 1
- 112 1
- 113
- 114
- 115
- 117 1
- 118 1
- 150
- 1P1 1
- 1P2 1
- 1P3 1
- 1P4
- 203
- 209
- 2P2
- 303
- 304
- 306
- 309
- 3P9
- 411/412/413
- 441
- 460
- 501 1
- 502
- 504 1
- 5P1
- 5P2
- 5P6
- 5P3
- 5P5
- 602
- 603 1
- 605
- 608
- 612 1
- 730
- Unconfigured
- Conflict
Frequently asked questions
Can the TFTN285 use 2" venting?
No. NTI's product page lists 3" inlet and exhaust runs to 150 ft maximum each for the TFTN285; the 2" option ends with the TFTN199.
Is the TFTN285 still a residential boiler?
NTI positions sizes from 285 to 850 MBH for commercial applications while listing the wall sizes together on its TFTN page. The 285 is the smallest of that larger class.
What are the TFTN285's dimensions?
21 3/8 inches wide, 34 1/8 inches high and 18 3/8 inches deep, at 180 lb with water, per the I&O manual's Table 2-1.
Questions about the NTI Trinity TFTN285?
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.
Compare and explore
- NTI Trinity TFTN199 vs TFTN285Comparison
- NTI Trinity TFTN285 vs TFTN340Comparison
- NTI Trinity TFTN085Same series
- NTI Trinity TFTN110Same series
- NTI Trinity TFTN150Same series
- NTI Trinity TFTN199Same series
- NTI Trinity TFTN340Same series
- NTI Trinity TFTN399Same series
- NTI Trinity TFTN500Same series
- NTI Trinity TFTN600Same series
- NTI Trinity TFTN725Same series
- NTI Trinity TFTN850Same series
- Trinity TFTN series hub
- Buying guide
Sources and verification
- NTI — TFTN Series product page · accessed September 7, 2026
- TFTN 085–399 I&O Manual, 99987137, V.2025-04-24 (HMI R30) · 99987137 · accessed September 7, 2026
- TFTN 500–850 I&O Manual, 99987545, V.2025-04-24 · 99987545 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.