Raypak · Series
Raypak MVB Category IV
The MVB Category IV is Raypak's modulating vertical condensing boiler line — models H7-503A through H7-4003 — with Category IV venting and a compact footprint that fits through a standard 32-inch door.
Series facts
- Type
- condensing
- Efficiency
- Unknown
- Fuel
- Natural gas per the captured page; propane configuration is not reprinted on the captured text.
- Venting
- Category IV (condensing) venting; the page notes the modulating vertical boiler fits through a 32-inch door.
- Models documented
- 0
- Warranty
- Not verified
About the MVB Category IV
The MVB (Modulating Vertical Boiler) Category IV is the condensing member of Raypak's MVB platform: a modulating vertical boiler with Category IV venting, marketed for its compact footprint — the page notes it fits through a 32-inch door.
Model sizes printed in the documentation rows are H7-503A, H7-753A, H7-1003A, H7-1253A, H7-1503A, H7-1753A, H7-2003A, H7-2503, H7-3003, H7-3503 and H7-4003. Efficiency percentages are published in the spec sheets rather than the captured page text.
Raypak publishes I&O manual 241511 (English and French editions) for the 503A–2003A size group and I&O 241510 for the 2503–4003 sizes. No explicit Canadian-availability sentence appears on the page.
Highlights
- Modulating vertical condensing boiler, Category IV venting
- Models H7-503A … H7-4003 (503A, 753A, 1003A, 1253A, 1503A, 1753A, 2003A, 2503, 3003, 3503, 4003)
- Compact design fits through a 32-inch door (page)
- I&O manual 241511 public in English and French
Models
MVB Category IV models
One canonical page per model with input, output and efficiency kept separate.
Error codes and alerts
MVB Category IV alerts
- OUTLET SENVERSA IC control with PIM (error items shown on the touchscreen display)
- LIMIT SENVERSA IC control with PIM (error items shown on the touchscreen display)
- INLET SENVERSA IC control with PIM (error items shown on the touchscreen display)
- GAS PRESSVERSA IC control with PIM (error items shown on the touchscreen display)
- IGNITIONVERSA IC control with PIM (error items shown on the touchscreen display)
- LIMIT TRIPVERSA IC control with PIM (error items shown on the touchscreen display)
- FLAMEVERSA IC control with PIM (error items shown on the touchscreen display)
- ID CARDVERSA IC control with PIM (error items shown on the touchscreen display)
- IGN CTRLVERSA IC control with PIM (error items shown on the touchscreen display)
- DELTA TVERSA IC control with PIM (error items shown on the touchscreen display)
- LOW 24VACVERSA IC control with PIM (error items shown on the touchscreen display)
- BLOW SPEEDVERSA IC control with PIM (error items shown on the touchscreen display)
- OUTLET SENVERSA IC control with PIM (error items shown on the touchscreen display)
- LIMIT SENVERSA IC control with PIM (error items shown on the touchscreen display)
- INLET SENVERSA IC control with PIM (error items shown on the touchscreen display)
- GAS PRESSVERSA IC control with PIM (error items shown on the touchscreen display)
- IGNITIONVERSA IC control with PIM (error items shown on the touchscreen display)
- LIMIT TRIPVERSA IC control with PIM (error items shown on the touchscreen display)
- FLAMEVERSA IC control with PIM (error items shown on the touchscreen display)
- ID CARDVERSA IC control with PIM (error items shown on the touchscreen display)
- IGN CTRLVERSA IC control with PIM (error items shown on the touchscreen display)
- DELTA TVERSA IC control with PIM (error items shown on the touchscreen display)
- LOW 24VACVERSA IC control with PIM (error items shown on the touchscreen display)
- BLOW SPEEDVERSA IC control with PIM (error items shown on the touchscreen display)
Manuals
Official documents
- Raypak MVB Category IV (503A–2003A) — I&O product manual (EN) · 241511
- Raypak MVB Category IV (503A–2003A) — I&O product manual (FR) · 241511-FR
- Raypak MVB Category IV (2503–4003) — I&O product manual (EN) · 241510
- Raypak MVB Type H Models 503A-2003A — product submittal · 241861
- Raypak MVB Type H Models 2503-4003 — product submittal · 241866
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.
Services for Raypak boilers
Frequently asked questions
What is 'Category IV' on the MVB?
It is the condensing venting category: MVB Category IV models are condensing boilers vented as Category IV appliances, while the MVB Category I and III models on the same platform are non-condensing.
How big can an MVB Category IV be?
The product page prints sizes from H7-503A to H7-4003 (503A–4003 MBH class).
Talk to a boiler technician
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
- Raypak — MVB hydronic boiler, Category IV venting product page · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.