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Comparison

Rinnai M060SN vs Rinnai M090CN

Verdict in brief

The Rinnai M060SN and Rinnai M090CN are both combination (combi) boilers in the Rinnai M-Series (discontinued) line. The Rinnai M060SN is documented at 17 MBH input, while the Rinnai M090CN is documented at 23.5 MBH input. Rinnai M090CN lists 6.5 MBH more input than Rinnai M060SN (23.5 MBH against 17 MBH). Rinnai M090CN lists 20 lb more shipping weight than Rinnai M060SN (84 lb against 64 lb).

Side by side

Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.

Comparison of Rinnai M060SN and Rinnai M090CN
SpecificationRinnai M060SNRinnai M090CN
Minimum input (hero bullet, NG)17 MBH23.5 MBH
Product weight64 lb84 lb
Product height31.8 in (808 mm)31.8 in (808 mm)
Product width17.3 in (440 mm)17.3 in (440 mm)
Product depth10.46 in (266 mm)10.46 in (266 mm)
Gas connection3/4" MNPT (19 mm)3/4" MNPT (19 mm)
Gas type (as printed)Natural GasNatural Gas
Central heating capacity (as printed)60 MBH90 MBH
Maximum input (hero bullet, as printed)N (maximum) — page print bug160 MBH
Residential ENERGY STARYesYes
SCAQMD approvalUltra Low NOxUltra Low NOx

What actually separates them

Published ratings: the Rinnai M060SN is rated 17 MBH input; the Rinnai M090CN is rated 23.5 MBH input. Rinnai M090CN lists 6.5 MBH more input than Rinnai M060SN (23.5 MBH against 17 MBH).

Rinnai M090CN lists 20 lb more shipping weight than Rinnai M060SN (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.

DiscontinuedHistorically in Canada
Input
Output (max)
AFUE

The Rinnai M060SN 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.

Natural gasHeating-only
DiscontinuedHistorically in Canada
Input
Output (max)
AFUE

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.

Natural gasCombi

Frequently asked questions

Which of the two has the higher maximum input?

The Rinnai M090CN lists 23.5 MBH, against 17 MBH on the Rinnai M060SN, per the cited documentation.

How much heavier is the Rinnai M090CN?

It ships at 84 lb against 64 lb for the Rinnai M060SN, per the cited sources.

Not sure which one fits your home?

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.

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