IBC Technologies · Superflow SFC-1 Combi
IBC SFC 125-1 Superflow
The IBC SFC 125-1 Superflow is a wall-hung condensing combi boiler rated 95% AFUE: up to 99 MBH for space heating and 125 MBH for domestic hot water, with 3.2 GPM continuous DHW delivery at a 67°F rise.
Key figures
- Max input
- 99 MBH
- Max CSA output
- 89 MBH
- AFUE
- 95 %
- Min input
- 16.5 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
IBC SFC 125-1 Superflow in practice
The SFC 125-1 combines space heating and hot water in one cast-aluminium heat exchanger with two independent copper waterways. It is the middle of the SFC line, and its defining feature is that IBC caps the space-heating input at 99 MBH while allowing 125 MBH for hot-water production, so the boiler is not oversized for heating just to satisfy DHW.
At 3.2 GPM continuous DHW delivery (67°F rise, per IBC's Canadian page) it suits a household with larger or more frequent hot-water draws than the SFC 99-1 comfortably covers, while still fitting on a wall with 2" or 3" PVC, CPVC or PPs venting.
The controller shows numeric fault codes (F-series) rather than text alerts; the fault table is documented on this site against IBC's installation instructions so a homeowner can report the exact code when calling for service.
Best suited to
- Detached homes and larger townhouses with steady DHW demand
- Households wanting more hot-water headroom than the SFC 99-1 while keeping a single appliance
- Projects reusing or re-running 2" PVC venting within 65 equivalent feet
Applicability and support
- Model number
- SFC 125-1
- 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 IBC Technologies. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, minimum | 16.5 MBH | 4.8 kW |
| Heating input, maximum | 99 MBH | 29 kW. Space heating is capped below the DHW input on this model. |
| Output | ||
| CSA output, minimum | 15.8 MBH | 4.6 kW |
| CSA output, maximum | 89 MBH | 26.1 kW. DOE heating capacity is not published on the IBC pages we cite. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | As published by IBC on the Canadian model page. |
| Domestic hot water | ||
| DHW input, maximum | 125 MBH | 36.6 kW |
| DHW delivery at 67°F rise | 3.2 GPM | Continuous delivery per IBC Canada model page; the SFC 99-1 page uses a 70°F-rise figure instead. |
| Max. DHW flow rate | 4 GPM | |
| Flow to activate DHW | 0.5 GPM | |
| Domestic hot water | Integrated coil in the main heat exchanger (combi) | |
| Venting and air | ||
| Flue material | 2" Schedule 40 PVC, CPVC or PPs | Canada: venting must meet ULC S636 where applicable. |
| Max. equivalent vent length, 2" | 65 ft | Each side. |
| Max. equivalent vent length, 3" | 120 ft | Each side. |
| Physical and connections | ||
| Weight (empty) | 85 lb | 39 kg |
| Heating water connections | 1" NPT | |
| DHW connections | 3/4" NPT | |
| Gas connection | 3/4" NPT | |
| Condensate connection | 3/4" hose | |
| Operating limits and other | ||
| Fuel | Natural gas or propane | Conversion kit included per IBC model page. |
| Gas supply pressure | 4 – 14 in. w.c. | |
| Max. operating pressure, heating coil | 43.5 psig | DHW coil rated 150 psig. |
| Altitude rating | 10,000 ft | |
Manuals
Alerts documented for this model
Frequently asked questions
Why is the heating input capped at 99 MBH on the SFC 125-1?
IBC publishes the SFC 125-1 with 16.5-99 MBH CSA heating input but up to 125 MBH DHW input. The boiler is sized by both loads; the DHW rating does not mean the heating side is 125 MBH.
How much hot water can the SFC 125-1 deliver?
3.2 GPM continuously at a 67°F temperature rise per IBC's Canadian model page, up to a maximum DHW flow of 4 GPM.
Is the SFC 125-1 a condensing boiler?
Yes. Flue gases condense during both space-heating and DHW operation, and the unit needs a condensate drain and direct-vent installation.
Questions about the IBC SFC 125-1 Superflow?
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.
Sources and verification
- IBC SFC 125-1 and SFC 199-1 — model page (Canada) · accessed September 7, 2026
- IBC SUPERFLOW SFC-1 — series page (Canada) · accessed September 7, 2026
- IBC SFC-1 Installation & Operating Instructions · 84156406 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.