IBC Technologies · HC Series (discontinued)
IBC HC 23-84
The IBC HC 23-84 is a discontinued heating-only boiler rated 23–84 MBH input and 21.2–74.8 MBH output at 94% AFUE, sharing the DC 23-84's ratings on the heating side without the DHW coil.
Key figures
- Max input
- 84 MBH
- Max CSA output
- 74.8 MBH
- AFUE
- 94 %
- Min input
- 23 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
IBC HC 23-84 in practice
The HC 23-84 matches the DC 23-84's heating-side ratings — 23–84 MBH CSA input (6.7–24.9 kW), 21.2–74.8 MBH output (6.2–21.9 kW) and 94% AFUE — but as a heating-only boiler it has no domestic-hot-water coil or DHW temperature rows. The space-heating coil is rated 43.5 psig with a supplied 30 psig relief valve.
It weighs 85 lb (39 kg), holds 0.37 USG (1.4 L) and draws 126 W at full fire with the internal pump; maximum boiler flow is 9 USgpm and the minimum is 2 USgpm. Space-heating water runs 50–194°F, gas supply is 5–14" w.c. and the unit is approved to 12,000 ft altitude.
The 23-84 is covered by HC I&O manual 120-185-A-R9 (the same document IBC lists as its discontinued-models file). It vents 120 equivalent feet in 3" or 35 feet in 2" per side, and the discontinued HC Series remains documented on IBC's Technical Information Portal.
Best suited to
- Owners comparing an HC 23-84 with the DC 23-84 combi
- Homes where a heating-only boiler at up to 74.8 MBH output matches the load
- Technicians working from HC I&O manual 120-185-A-R9
Applicability and support
- Model number
- HC 23-84
- 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 | 23 MBH | 6.7 kW |
| Input, maximum | 84 MBH | 24.9 kW |
| Output | ||
| CSA output, minimum | 21.2 MBH | 6.2 kW |
| CSA output, maximum | 74.8 MBH | 21.9 kW |
| Efficiency | ||
| Efficiency (AFUE) | 94 % | 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) | 85 lb | 39 kg |
| Pressure vessel water content | 0.37 USG / 1.4 L | |
| Electrical | ||
| Power use at full fire (internal pump) | 126 W | 120 V / 60 Hz. |
| Operating limits and other | ||
| Maximum boiler flow rate | 9 USgpm | |
| Minimum boiler flow rate | 2 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
How is the HC 23-84 different from the DC 23-84?
The heating ratings match, but the HC 23-84 is a heating-only boiler with no DHW coil or DHW temperature rows; the DC 23-84 was a combi.
Which manual covers the HC 23-84?
HC I&O manual 120-185-A-R9 lists the HC 23-84 among the models it covers; IBC also hosts the same document under its discontinued-models file.
Is the HC 23-84 still sold?
No. The HC Series is discontinued and documented on IBC's Technical Information Portal.
Questions about the IBC HC 23-84?
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.