Triangle Tube Instinct 199C (wall combi)
The Instinct 199C (INS199C) is the top Instinct wall combi: 24.875 to 199 MBH heating input with 5.3 GPM of DHW at a 70°F rise, rated 95% AFUE in a 130 lb wall cabinet. Discontinued with the November 3, 2025 cessation.
Key figures
- Max input
- 199 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 24.875 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Triangle Tube Instinct 199C (wall combi) in practice
The 199C pairs the largest Instinct wall firing range — 24,875 to 199,000 BTU/h at 95% AFUE with an 8:1 turndown — with the combi's large plate heat exchanger, which the product page says keeps the boiler fully condensing in DHW mode. Its published DHW delivery of 5.3 GPM at a 70°F rise is the figure behind the line's '5+ GPM of hot water' claim, and it reaches 4.9 GPM at 75°F and 4.6 GPM at 80°F.
At 130 lb and 21.75" wide by 33" tall it is the heaviest wall-hung Instinct, holding 4 gallons of water with 1" MNPT supply/return connections and a 3/4" MNPT gas connection. The DHW side is rated for a 150 °F maximum flow temperature with a 0.5 GPM minimum flow and 150 psi maximum operating pressure, and venting is 3" to 100 ft with no 2" run listed. Triangle Tube ceased operations November 3, 2025; this model is documented for the installed base.
Best suited to
- Larger homes wanting one wall-hung combi with 199 MBH of heating headroom
- Households whose hot-water draws benefit from the 5.3 GPM DHW rating at 70°F
- Projects replacing boiler-plus-tank systems at the top of the wall-combi range
Applicability and support
- Model number
- INS199C
- Canadian availability
- historical
- Production status
- discontinued
- 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 Triangle Tube. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, minimum | 24.875 MBH | 24,875 to 199,000 BTU/h as printed. |
| Heating input, maximum | 199 MBH | 24,875 to 199,000 BTU/h as printed. |
| Output | ||
| DOE heating capacity | 184 MBH | Per the product-page spec table. |
| Net AHRI rating | 159 MBH | Per the product-page spec table. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95% AFUE per the product-page spec table. |
| Domestic hot water | ||
| Maximum DHW flow temperature | 150 °F (65 °C) | Per the product page. |
| DHW output at 70°F rise | 5.3 GPM | Per the product page. |
| DHW output at 75°F rise | 4.9 GPM | Per the product page. |
| DHW output at 80°F rise | 4.6 GPM | Per the product page. |
| DHW minimum flow | 0.5 GPM | |
| DHW maximum operating pressure | 150 psi | |
| Venting and air | ||
| Maximum vent length, 3" | 100 ft | Per the product page and vent supplement 241576; the combi page prints no 2" run. |
| Vent/air diameter | 3" connection; 3-in-1 adapter accepts PVC, polypropylene or stainless steel | Per the product-page spec table. |
| Physical and connections | ||
| Water volume | 4 gal | |
| Weight | 130 lb | |
| Width | 21.75 in | The combi cabinet is 7" taller than the wall solo. |
| Height | 33 in | |
| Depth | 16.5 in | |
| Supply/return connections | 1" MNPT | |
| Gas connection | 3/4" MNPT | |
| Operating limits and other | ||
| Fuel | Natural gas or propane | |
| Turndown ratio | 8:1 | |
| Maximum CH flow temperature | 185 °F | Per the product page. |
Manuals
- Instinct Wall (WHB) Installation & Maintenance Manual — Solo 110-155-199 & Combi 155-199241573 Rev. A03 · 2025-09
Alerts documented for this model
Frequently asked questions
What DHW delivery does the Instinct 199C publish?
5.3 GPM at a 70°F temperature rise, 4.9 GPM at 75°F and 4.6 GPM at 80°F, with a 0.5 GPM minimum flow and 150 psi maximum DHW operating pressure, per the product page.
How does the 199C differ from the 155C?
The firing range tops out at 199,000 BTU/h against 155,000 BTU/h, the heating ratings rise from 142 to 184 MBH DOE capacity and 123 to 159 MBH net AHRI, and DHW delivery at a 70°F rise steps from 4.0 to 5.3 GPM. The 199C weighs 130 lb against 110 lb.
Questions about the Triangle Tube Instinct 199C (wall combi)?
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
- Triangle Tube Instinct 110S (wall)Same series
- Triangle Tube Instinct 155S (wall)Same series
- Triangle Tube Instinct 199S (wall)Same series
- Triangle Tube Instinct 110S (floor)Same series
- Triangle Tube Instinct 155S (floor)Same series
- Triangle Tube Instinct 199S (floor)Same series
- Triangle Tube Instinct 155C (wall combi)Same series
- Triangle Tube Instinct 155C (floor combi)Same series
- Triangle Tube Instinct 199C (floor combi)Same series
- Instinct series hub
- Buying guide
Sources and verification
- Instinct Wall Installation & Maintenance Manual, 241573 Rev. A03 (09/2025) · accessed September 7, 2026
- Instinct Wall & Floor Vent Supplement, 241576 Rev. A02 (09/2025) · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.