Triangle Tube Challenger CC105 Combi
The Challenger CC105 Combi is the mid-size 'Two in One' combi: 29 to 106 MBH at 94% AFUE with 2.5 GPM of DHW at a 70°F rise, condensing in both heating and hot-water modes. Discontinued years before the November 3, 2025 cessation.
Key figures
- Max input
- 106 MBH
- Max CSA output
- —
- AFUE
- 94 %
- Min input
- 29 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Triangle Tube Challenger CC105 Combi in practice
The Challenger 105 combi row of the archived 2019 comparison table lists 29 to 106 MBH of input at 94% AFUE with a 4.08:1 turndown, a 94 MBH DOE capacity and an 82 MBH net AHRI rating, plus 2.5 GPM of DHW flow at a 70°F rise. The combi's 'Two in One' heat exchanger heats domestic water directly in the primary exchanger, so the boiler keeps condensing in DHW mode.
The CC105 combi is one of the two combi sizes with full rows in the 2019 table (the other is the CC125); the official combi user's manual covers the CC105/CC125/CC125H models. Like all Challengers it predates the November 3, 2025 cessation by years and is documented from archived pages and manuals.
Best suited to
- Owners identifying a CC105 combi from its rating plate and 2019-era comparison row
- Homes whose original load and hot-water draw matched the 106 MBH combi package
- Service work on the 'Two in One' heat exchanger design documented in the combi manual
Applicability and support
- Model number
- CC105
- Canadian availability
- historical
- Production status
- discontinued
- 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 Triangle Tube. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, minimum | 29 MBH | |
| Heating input, maximum | 106 MBH | |
| Output | ||
| DOE heating capacity | 94 MBH | Per the product-page spec table. |
| Net AHRI rating | 82 MBH | Per the product-page spec table. |
| Efficiency | ||
| Efficiency (AFUE) | 94 % | 94% AFUE on the Challenger 105 combi row of the 2019 product-comparison table. |
| Domestic hot water | ||
| DHW output at 70°F rise | 2.5 GPM | Per the 2019 product-comparison table. |
| Operating limits and other | ||
| Turndown ratio | 4.08:1 | The combi comparison row prints a 4.08:1 turndown. |
| Fuel | Natural gas or propane | The 2019 comparison table prints NG/LP on every Challenger row. |
Alerts documented for this model
None documented yet.
Frequently asked questions
How much hot water does the CC105 Combi produce?
The 2019 comparison table lists 2.5 GPM of DHW flow at a 70°F rise for the Challenger 105 combi, produced directly in the primary heat exchanger in 'Two in One' fashion.
Does the CC105 Combi condense while making hot water?
Yes — that was the point of the design. Triangle Tube's combi marketing says heating domestic water directly in the primary heat exchanger lets the boiler condense in DHW mode and eliminates a separate heat exchanger and three-way valve.
Questions about the Triangle Tube Challenger CC105 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 Challenger CC85 Solo vs CC105 CombiComparison
- Triangle Tube Challenger CC105 Combi vs SoloComparison
- Triangle Tube Challenger CC85 SoloSame series
- Triangle Tube Challenger CC105 SoloSame series
- Triangle Tube Challenger CC125 SoloSame series
- Triangle Tube Challenger CC150 SoloSame series
- Triangle Tube Challenger CC85 CombiSame series
- Triangle Tube Challenger CC125 CombiSame series
- Challenger series hub
- Buying guide
Sources and verification
- Challenger Combi User's Information Manual, doc 2010-20 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.