NTI Trinity TFTN600
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.
Key figures
- Max input
- 600 MBH
- Max CSA output
- —
- AFUE
- —
- Min input
- 60 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
NTI Trinity TFTN600 in practice
The TFTN600 runs 60 to 600 MBH input at 97.8% thermal efficiency with a heating capacity of 585 MBH and a Net AHRI rating of 509 MBH. It shares the TFTN500's floor chassis — 575 lb with water, 12.5 gallons of water content — and its 2" male NPT water connections, 1" male NPT gas connection and 4" venting to 150 ft per side.
The step from the 500 to the 600 buys a 100 MBH higher ceiling for a thermal-efficiency change of only two tenths of a point (98% down to 97.8%), with no change in weight, water content, connections or venting. In practice the choice is the plant-demand calculation: buildings whose load or recovery demand approaches 600 MBH justify the larger model, while loads inside the 500's range gain nothing but a higher minimum fire from stepping up.
Best suited to
- Commercial hydronic plants whose load calculation approaches 600 MBH
- Buildings wanting the TFTN600's ceiling without moving to the 725's larger connections
- Boiler rooms able to keep the shared 4" venting and 2" water plan of the 500/600 class
Applicability and support
- Model number
- TFTN600
- 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 | 60 MBH | Per the NTI product page. |
| Input, maximum | 600 MBH | Per the NTI product page. |
| Output | ||
| Heating capacity | 585 MBH | Per the NTI product page. |
| Net AHRI rating | 509 MBH | Per the NTI product page. |
| Efficiency | ||
| Thermal efficiency | 97.8 % | Per the NTI product page; the floor TFTN models are rated by thermal efficiency rather than AFUE. |
| Domestic hot water | ||
| Domestic hot water | Heating-only; pair with an indirect tank or separate water heater | |
| Venting and air | ||
| Max. equivalent vent length, 4" | 150 ft | Inlet and exhaust runs, per the NTI product page. |
| Physical and connections | ||
| Weight | 575 lb | With water, per the NTI product page. |
| Water content | 12.5 gal | Per the NTI product page. |
| CH water connections | 2" NPT | Male NPT per the NTI product page. |
| Gas connection | 1" NPT | Male NPT per the NTI product page. |
| Operating limits and other | ||
| Fuel | Natural gas or propane | NTI publishes LP conversion instructions for the TFTN500–850 size group. |
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
How does the TFTN600 compare with the TFTN500?
Input rises from 50–500 to 60–600 MBH, heating capacity from 489 to 585 MBH and the Net AHRI rating from 425 to 509 MBH, while thermal efficiency eases from 98% to 97.8%. Weight, water content, connections and venting are unchanged.
What does the TFTN600 weigh?
575 lb with water per the NTI product page — the same as the TFTN500 — with 12.5 gallons of water content.
Can the TFTN600 run on propane?
Yes. NTI publishes LP conversion instructions for the TFTN500–850 size group; conversion is a licensed gas-fitter task following NTI's procedure.
Questions about the NTI Trinity TFTN600?
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 TFTN500 vs TFTN600Comparison
- NTI Trinity TFTN600 vs TFTN725Comparison
- NTI Trinity TFTN085Same series
- NTI Trinity TFTN110Same series
- NTI Trinity TFTN150Same series
- NTI Trinity TFTN199Same series
- NTI Trinity TFTN285Same series
- NTI Trinity TFTN340Same series
- NTI Trinity TFTN399Same series
- NTI Trinity TFTN500Same 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 8, 2026
- TFTN 500–850 I&O Manual · 99987545 · accessed September 8, 2026
Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.