IBC Technologies · HC Series (discontinued)
IBC HC 20-125
The IBC HC 20-125 is a discontinued heating-only boiler rated 20–125 MBH input and 18.6–110.8 MBH output at 95% AFUE, with a 20 MBH minimum fire and 0.5 USG of vessel water.
Key figures
- Max input
- 125 MBH
- Max CSA output
- 110.8 MBH
- AFUE
- 95 %
- Min input
- 20 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
IBC HC 20-125 in practice
The HC 20-125 covers 20–125 MBH CSA input (5.6–36.6 kW) for 18.6–110.8 MBH output (5.4–32.5 kW) at 95% AFUE. Its 20 MBH minimum input is the second-lowest in the HC line after the 13-50's 13.5 MBH, while its 110.8 MBH output sits just above the 29-106's 94.3 MBH.
It is heating-only, with the standard HC 43.5 psig space-heating coil, a supplied 30 psig relief valve and 50–194°F water temperatures. The unit weighs 96 lb (44 kg), holds 0.5 USG (1.9 L) and draws 130 W at full fire including the internal pump; maximum boiler flow is 11 USgpm and the minimum is 3 USgpm.
The 20-125 appears in both HC I&O coverage lists (120-185-A-R10 and 120-185-A-R9). It vents 120 equivalent feet in 3" or 35 feet in 2" per side and remains documented on IBC's Technical Information Portal.
Best suited to
- Owners documenting an existing HC 20-125 installation
- Homes wanting a low 20 MBH minimum fire with up to 110.8 MBH output
- Technicians comparing the HC 20-125 with the 29-106 and 33-160
Applicability and support
- Model number
- HC 20-125
- 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 IBC Technologies. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, minimum | 20 MBH | 5.6 kW |
| Input, maximum | 125 MBH | 36.6 kW |
| Output | ||
| CSA output, minimum | 18.6 MBH | 5.4 kW |
| CSA output, maximum | 110.8 MBH | 32.5 kW |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | Per the HC specification table. |
| Domestic hot water | ||
| Domestic hot water | Heating-only boiler; no DHW coil | |
| Venting and air | ||
| Max. equivalent vent length, 3" | 120 ft | Each side. |
| Max. equivalent vent length, 2" | 35 ft | Each side. |
| Physical and connections | ||
| Weight (empty) | 96 lb | 44 kg |
| Pressure vessel water content | 0.5 USG / 1.9 L | |
| Electrical | ||
| Power use at full fire (internal pump) | 130 W | 120 V / 60 Hz. |
| Operating limits and other | ||
| Maximum boiler flow rate | 11 USgpm | |
| Minimum boiler flow rate | 3 USgpm | |
| Fuel | Natural gas or propane | The DC/HC specification table notes conversion kits must be ordered separately. |
| Gas supply pressure | 5 – 14 in. w.c. | |
| Ambient temperature | 32 – 122 °F | 0 – 50°C. |
| Space-heating water temperature | 50 – 194 °F | 10 – 90°C. |
| Max. operating pressure, space-heating coil | 43.5 psig | The unit ships with a 30 psig pressure relief valve. |
| Altitude rating | 12,000 ft | |
Manuals
Alerts documented for this model
Frequently asked questions
What is the HC 20-125's minimum input?
20 MBH (5.6 kW), per the HC specification table.
Does the HC 20-125 make domestic hot water?
No. It is a heating-only boiler; the DC 20-125 was the combi version.
Which manuals cover the HC 20-125?
Both HC I&O manuals captured for this record cover it: 120-185-A-R10 and 120-185-A-R9.
Questions about the IBC HC 20-125?
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 Technical Information Portal — HC series specification table · accessed September 9, 2026
- IBC Technical Information Portal — HC guides and manuals · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.