Raypak MVB H7-504A
The Raypak MVB H7-504A is a non-condensing modulating vertical commercial hydronic boiler rated 500 MBTUH input and 420 MBTUH output at 84% thermal efficiency, with Category I & III venting and a 8 in flue.
Key figures
- Max input
- 500 MBH
- Max CSA output
- 420 MBH
- AFUE
- —
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Raypak MVB H7-504A in practice
The H7-504A is the 500 MBTUH size of the MVB Category I & III line, the non-condensing member of Raypak's modulating vertical boiler platform. Product submittal 241864 prints 500 MBTUH input, 420 MBTUH output and 84% thermal efficiency, with 2" NPT water connections, a 1" NPT gas connection, a 8 in flue, a 6 in combustion-air connection, 600 lb operating weight and a 1.7:1 turndown on the product page.
The boiler vents as a Category I or III appliance, runs on the VERSA IC control with cascade up to eight units, and is documented by I&O manual 241512 in English and French. Submittal 241864 provides the rating and dimensions data used above.
Best suited to
- Commercial hydronic loads near 500 MBTUH input
- Buildings with existing Category I or III venting where a condensing boiler is not required
- Plants standardising on the modulating vertical MVB platform
Applicability and support
- Model number
- H7-504A
- Canadian availability
- unknown
- 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 Raypak. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input | 500 MBH | Rated input 500 MBTUH printed in the 241864 product submittal. |
| Output | ||
| Output | 420 MBH | Rated output 420 MBTUH printed in the 241864 submittal. |
| Efficiency | ||
| AHRI thermal efficiency | 84 % | 84% thermal efficiency at full rate per the product page and the 241864 submittal. |
| Venting and air | ||
| Venting category | Category I & III | Non-condensing Category I or III venting per the product page model data. |
| Flue outlet | 8 in | Flue outlet diameter per the 241864 submittal. |
| Combustion air intake | 6 in | Combustion-air connection diameter per the 241864 submittal. |
| Physical and connections | ||
| Water connection | 2" NPT | Water connection per the 241864 submittal's dimensions table. |
| Gas connection | 1" NPT | Gas connection (natural gas) per the 241864 submittal; the submittal notes propane models use a 1 in NPT connection. |
| Weight | 600 lb | Operating weight 600 lb printed in the 241864 submittal. |
| Electrical | ||
| Electrical | 120 VAC, 1-phase | Operating voltage from the product page model data. |
| Operating limits and other | ||
| Turndown | 1.7:1 | Turndown printed for the MVB Category I & III sizes in the product page model data. |
| Maximum water flow | 100 GPM | Maximum water flow from the product page model data. |
| Cascade | Up to 8 boilers | VERSA IC control with cascade up to 8 boilers per the product page model data. |
| Fuel | Natural gas or propane | Natural gas or propane; the 241864 submittal prints propane connection sizes separately. |
Manuals
Alerts documented for this model
Frequently asked questions
What are the MVB H7-504A ratings?
Product submittal 241864 prints 500 MBTUH input, 420 MBTUH output and 84% thermal efficiency.
Is the H7-504A condensing?
No. The MVB Category I & III models are the non-condensing version of the MVB platform, vented as Category I or III appliances; the MVB Category IV models are the condensing members.
Which manual covers the MVB Category I & III?
Raypak publishes I&O 241512 in English and 241512-FR in French for the H WH P 504A-2004A models.
Questions about the Raypak MVB H7-504A?
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 — official site · accessed September 9, 2026
- Raypak — MVB hydronic boiler, Category I & III venting product page · accessed September 9, 2026
- Raypak — MVB Type H Models 504A-2004A product submittal (241864) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.