Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
Both the Rinnai M090CN and the Rinnai M090SN belong to the Rinnai M-Series (discontinued) line of combination (combi) boilers. The Rinnai M090CN is documented at 23.5 MBH input, while the Rinnai M090SN is documented at 17 MBH input. Rinnai M090CN lists 6.5 MBH more input than Rinnai M090SN (23.5 MBH against 17 MBH). Rinnai M090CN lists 20 lb more shipping weight than Rinnai M090SN (84 lb against 64 lb).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Rinnai M090CN | Rinnai M090SN |
|---|---|---|
| Minimum input (hero bullet, NG) | 23.5 MBH | 17 MBH |
| Product weight | 84 lb | 64 lb |
| Product height | 31.8 in (808 mm) | 31.8 in (808 mm) |
| Product width | 17.3 in (440 mm) | 17.3 in (440 mm) |
| Product depth | 10.46 in (266 mm) | 10.46 in (266 mm) |
| Gas connection | 3/4" MNPT (19 mm) | 3/4" MNPT (19 mm) |
| Gas type (as printed) | Natural Gas | Natural Gas |
| Central heating capacity (as printed) | 90 MBH | 90 MBH |
| Maximum input (hero bullet, as printed) | 160 MBH | N (maximum) — page print bug |
| Residential ENERGY STAR | Yes | Yes |
| SCAQMD approval | Ultra Low NOx | Ultra Low NOx |
Published ratings: the Rinnai M090CN is rated 23.5 MBH input; the Rinnai M090SN is rated 17 MBH input. Rinnai M090CN lists 6.5 MBH more input than Rinnai M090SN (23.5 MBH against 17 MBH).
Rinnai M090CN lists 20 lb more shipping weight than Rinnai M090SN (84 lb against 64 lb).
Both records print the same height (31.8 in (808 mm)), width (17.3 in (440 mm)), depth (10.46 in (266 mm)) and gas connection (3/4" MNPT (19 mm)), per the cited sources.
Rinnai
The Rinnai M090CN is a discontinued Canadian M-Series combi boiler — a compact wall-mounted condensing natural-gas unit documented from the specs printed on its orphaned rinnai.ca page.
Rinnai
The Rinnai M090SN is a discontinued Canadian M-Series heating-only solo boiler — a compact wall-mounted condensing natural-gas unit documented from the specs printed on its orphaned rinnai.ca page.
The Rinnai M090CN lists 23.5 MBH, against 17 MBH on the Rinnai M090SN, per the cited documentation.
It ships at 84 lb against 64 lb for the Rinnai M090SN, per the cited sources.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.