IBC EX 500
The IBC EX 500 is a floor-standing commercial condensing boiler rated 50–500 MBH input and 485 MBH output at 97.5% thermal efficiency, with 4" venting to 170 equivalent feet and 2" NPT-M water connections.
Key figures
- Max input
- 500 MBH
- Max CSA output
- 485 MBH
- AFUE
- —
- Min input
- 50 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
IBC EX 500 in practice
The EX 500 covers 50–500 MBH CSA input (14.6–146.5 kW) with 485 MBH CSA output (142 kW) at 97.5% thermal efficiency to ANSI/AHRI-1500 — the second-highest rating in the EX line after the EX 400's 97.9%. It shares the series' touchscreen control, remote access, multi-boiler communication and 10:1 turndown.
Like the EX 400 it uses a 4" Schedule 40 flue and 4" combustion air with 170 equivalent feet of vent per side, plus 2" NPT-M water connections. It weighs approximately 441 lb (200 kg) empty, has 72.9 ft² (6.77 m²) of heating surface, holds 12.4 USG (46.9 L) of water and needs a 12 USgpm minimum flow against the 100 USgpm maximum.
All EX models are rated 160 psig maximum operating pressure with a 50 psig relief valve supplied (alternatives of 30, 100, 125 and 150 psig are available) and are approved to 12,000 ft altitude. The EX I&O manual is 120-327E10.
Best suited to
- Commercial loads between the EX 400 and EX 700
- Projects that want 97.5% thermal efficiency on a 4" flue
- Mechanical rooms with up to 170 equivalent feet of vent per side
Applicability and support
- Model number
- EX 500
- 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 | ||
| CSA input, minimum | 50 MBH | 14.6 kW |
| CSA input, maximum | 500 MBH | 146.5 kW |
| Output | ||
| CSA output | 485 MBH | 142 kW |
| Efficiency | ||
| Thermal efficiency (ANSI/AHRI-1500) | 97.5 % | |
| Venting and air | ||
| Max. equivalent vent length, each side | 170 ft | |
| Flue / combustion air | 4" Schedule 40 flue / 4" Schedule 40 combustion air | |
| Air intake | Direct vent or indoor supply | |
| Physical and connections | ||
| Weight (empty) | 441 lb | Approx. 200 kg |
| Heating surface area | 72.9 ft² / 6.77 m² | |
| Pressure vessel water content | 12.4 USG / 46.9 L | |
| Water connections | 2" NPT-M | |
| Gas connection | 1" NPT-F | |
| Condensate connection | 3/4" hose | |
| Electrical | ||
| Power use at full fire (less pumps) | 210 W | 120 V / 60 Hz. |
| Operating limits and other | ||
| Minimum boiler flow rate | 12 USgpm | |
| Fuel | Natural gas or propane | CSA input is rated for natural gas or propane on IBC's EX commercial specification table. |
| Gas supply pressure | 4 – 14 in. w.c. | |
| Ambient temperature | 32 – 122 °F | 0 – 50°C. |
| Minimum water temperature | 34 °F | 1°C. |
| Max. water temperature (electronic hi-limit) | 190 °F | 88°C; lockout limit 201°F / 94°C. |
| Max. ΔT supply/return | 80 °F | 44°C electronic fence. |
| Maximum boiler flow rate | 100 USgpm / 378 Lpm | |
| Max. operating water pressure | 160 psig | 1,103 kPa. |
| Minimum water pressure | 8 psig | 55 kPa. |
| Relief valve (supplied) | 50 psig | 345 kPa; alternative 30, 100, 125 and 150 psig relief valves are available. |
| Altitude rating | 0 – 12,000 ft | |
Manuals
Alerts documented for this model
- Ignition Trials Exceeded
- Water High Limit
- Low Water Cutoff
- Interlock 1 or 2 Open
- Vent High Limit
- Max. delta T Exceeded
- Fan Pressure
- High/Low Gas Press
- Module High Current
- Low Module Current
- Low Water Pressure
- Inlet Pres. Sensor
- See: Status > SIM menu > Status
- Roll Out Switch
- Controller Board
- No Boilernet Comm
- No MAC address
- [Vent High Pressure]
- Flame Signal / Vent Block
- Reversed Flow
- Temp. probe error
- Unhandled error code
- Blank – screen dark
- Service mode after update
- Water High Limit / Low Water Cutoff won't clear
- Outlet Limited
- Remote offline
- Unoccupied
- Summer
- Failsafe Setpoint
- Sensor
Frequently asked questions
How much output does the EX 500 deliver?
485 MBH CSA output (142 kW) from 50–500 MBH input (14.6–146.5 kW), per IBC's EX commercial specification table.
Does the EX 500 use the same connections as the EX 700?
No. The EX 500 uses a 4" flue and 2" NPT-M water connections; the EX 700 and EX 850 step up to 6" flue and 2½" NPT-M water.
What is the EX 500's efficiency?
97.5% thermal efficiency to ANSI/AHRI-1500.
Questions about the IBC EX 500?
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 EX Series — series page (Canada) · accessed September 9, 2026
- IBC Technical Information Portal — EX commercial specification table · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.