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Comparison
Verdict in brief
The CB180DV and CB199DV are the two legacy Noritz CB Combi models and share the same 17.3 x 28.7 x 14.8 in, 90 lb wall-hung cabinet and ≥ 95% AFUE. The CB199DV raises the maximums: 199,000 against 180,000 BTU/h of DHW input and 120,000 against 100,000 BTU/h of space-heating input.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Noritz CB180DV | Noritz CB199DV |
|---|---|---|
| Input, minimum | 18 MBH | 18 MBH |
| DHW input, maximum | 180 MBH | 199 MBH |
| Space-heating input, maximum | 100 MBH | 120 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Capacity range | 4.2 / 7.2 / 9.2 GPM | 4.5 / 7.7 / 9.2 GPM |
| Weight | 90 lb | 90 lb |
| Width | 17.3 in | 17.3 in |
| Height | 28.7 in | 28.7 in |
| Depth | 14.8 in | 14.8 in |
The CB180DV and CB199DV were Noritz's original combination boilers, supplying domestic hot water and hydronic space heating from one wall-hung condensing appliance. The archived official pages print the same 18,000 BTU/h minimum, the same indoor dimensions (17.3" W × 28.7" H × 14.8" D), the same 90 lb spec-table weight and the same ≥ 95% AFUE for both.
The difference is at the top of each mode: the CB180DV reaches 180,000 BTU/h for DHW and 100,000 BTU/h for space heating, while the CB199DV reaches 199,000 and 120,000. The archived capacity-range rows print 9.2 / 7.2 / 4.2 GPM for the CB180DV and 9.2 / 7.7 / 4.5 GPM for the CB199DV, and both pages state the unit delivers up to 9.2 GPM of domestic hot water.
Both models used three stainless steel heat exchangers with DHW scald prevention, 90–140°F DHW and 100–180°F heating settings, and sealed combustion direct-vent or single-vent installation with PVC, CPVC or PP piping. Neither has a live page on noritz.com today; the current Noritz combi is the NRCB.
Noritz
The Noritz CB180DV is a legacy wall-hung condensing combi boiler: 180,000 BTU/h maximum DHW input, 100,000 BTU/h maximum space-heating input and ≥ 95% AFUE, documented from archived official Noritz pages.
Noritz
The Noritz CB199DV is a legacy wall-hung condensing combi boiler: 199,000 BTU/h maximum DHW input, 120,000 BTU/h maximum space-heating input and ≥ 95% AFUE, documented from archived official Noritz pages.
The maximum outputs: 180,000 against 199,000 BTU/h of DHW input and 100,000 against 120,000 BTU/h of space-heating input. Minimum fire, cabinet, weight, AFUE and connections are the same.
No. The CB has no live page on noritz.com — /products/cb180dv and /products/cb199dv return 404. Noritz's current combi boiler is the NRCB (NRCB180DV and NRCB199DV).
From archived captures of the official noritz.com product pages for the CB180 and CB199 (2015), cited in the records' sources and labelled as archived official pages.
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.