Noritz NRCB180DV
The Noritz NRCB180DV (GHQ-C2801WX-FF US) is a wall-hung condensing combi boiler rated 95.0% AFUE: it fires 18,000 to 100,000 BTU/h for space heating and up to 180,000 BTU/h for domestic hot water, in a 95 lb, 27-inch-tall cabinet Noritz markets for simultaneous DHW and heating.
Key figures
- Max input
- 100 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 18 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Noritz NRCB180DV in practice
The NRCB180DV pairs whole-home space heating with on-demand domestic hot water in one wall-hung condensing appliance: heating-mode input runs 18,000 to 100,000 BTU/h while the standard (DHW) side fires 18,000 to 180,000 BTU/h with DHW flow of 0.4 to 9.8 GPM per the official product page. Noritz rates the series 95.0% AFUE and builds it around 316L stainless steel primary and secondary heat exchangers with a fully modulating premix burner the pages state emits about 14 ppm NOx.
The model code's 180 names its DHW ceiling: domestic hot water draws up to 180,000 BTU/h of input while space heating tops out at 100,000 BTU/h, so sizing follows both the building's heat-loss calculation and the household's hot-water demand. The unit measures 27" high by 18.5" wide by 12.8" deep and weighs 95 lb, connects on 1" heating water fittings with 3/4" DHW and gas connections, and vents as a sealed combustion direct vent in 2" or 3" PVC, CPVC, polypropylene or stainless steel pipe — in Canada, plastic vent systems must be ULC S636-certified per the installation manual.
Noritz stocks the NRCB at its Vancouver, BC warehouse for Canadian wholesaler orders effective August 1, 2025, and the shared NRCB installation manual (SBB80UB-5, Rev. 04/21) covers US and Canadian codes (CSA B149.1). Boilers.ca found no Canadian CRN registration numbers or Canadian warranty terms on noritz.com; purchases run through wholesaler-distributors.
Best suited to
- Homes whose room-by-room heat-loss calculation fits under the 100 MBH heating ceiling
- Households whose hot-water demand stays within the 180,000 BTU/h DHW side
- Combi replacements where one wall-hung unit must cover heating and on-demand hot water
Applicability and support
- Model number
- NRCB180DV
- Canadian availability
- available
- 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 Noritz. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, minimum | 18 MBH | Space-heating mode input; 18,000 BTU/h. |
| Heating input, maximum | 100 MBH | Space-heating mode input; 100,000 BTU/h per the official product page. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95.0% AFUE as printed on the official product page and spec sheet. |
| Domestic hot water | ||
| DHW input, minimum | 18 MBH | Standard (DHW) input; 18,000 BTU/h. |
| DHW input, maximum | 180 MBH | Standard (DHW) input; 180,000 BTU/h per the official product page. |
| Venting and air | ||
| Venting | Sealed combustion direct vent; 2" or 3" PVC, CPVC, polypropylene or stainless steel | Per the installation manual venting section; in Canada, plastic vent systems must be certified to ULC S636. Convertible to single vent with kit #SV-CK-2. |
| Physical and connections | ||
| Weight | 95 lb | Per the official product page and spec sheet. |
| Width | 18.5 in | Per the official product page and spec sheet. |
| Height | 27 in | Per the official product page and spec sheet. |
| Depth | 12.8 in | Per the official product page and spec sheet. |
| Heating water connections | 1" in / 1" out | Per the official spec sheet. |
| Domestic hot water connections | 3/4" in / 3/4" out | Per the official spec sheet. |
| Gas connection | 3/4" NPT | Per the official spec sheet. |
| Pressure relief valve (heating) | 3/4" | ASME-certified, 30 psi, per the official spec sheet. |
| Auto feeder water inlet | 1/2" | Per the official spec sheet. |
| Operating limits and other | ||
| Fuel | Natural gas or propane | Official product identities include US NG and US LP versions (GHQ series). |
Manuals
- NRCB Installation Manual — Condensing Gas Combi Boiler, SBB80UB-5, Rev. 04/21SBB80UB-5, Rev. 04/21 · 2021-04
- NRCB Specification Sheet, SBB80U9-5, Rev. 04/21SBB80U9-5, Rev. 04/21 · 2021-04
Alerts documented for this model
None documented yet.
Frequently asked questions
How much space heating does the NRCB180DV provide?
Heating-mode input is 18,000 to 100,000 BTU/h, and the domestic hot water side fires 18,000 to 180,000 BTU/h at 95.0% AFUE. A room-by-room heat-loss calculation decides whether the 100 MBH heating ceiling fits the home.
Can the NRCB180DV run on propane?
Yes. Noritz's official product identities include US NG and US LP versions of the GHQ-C2801WX-FF chassis, and the spec sheet prints separate gas supply pressures for natural gas and propane. Fuel setup and conversion are licensed gas-fitting work.
How does the NRCB180DV compare with the NRCB199DV?
They are the same physical unit — 95 lb, 18.5 x 27 x 12.8 in, 18 MBH minimum fire and 95.0% AFUE. The NRCB199DV fires higher at the top of both ranges: 120 MBH heating against 100 MBH, and 199,900 BTU/h DHW input against 180,000.
Questions about the Noritz NRCB180DV?
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
- Noritz — NRCB180DV (GHQ-C2801WX-FF US) product page · accessed September 9, 2026
- NRCB Specification Sheet (SBB80U9-5, Rev. 04/21) · SBB80U9-5, Rev. 04/21 · accessed September 9, 2026
- NRCB Installation Manual (SBB80UB-5, Rev. 04/21) · SBB80UB-5, Rev. 04/21 · accessed September 9, 2026
- Noritz blog — Noritz opens new warehouse in Vancouver dedicated to shipping tankless water heaters and boilers to Canadian distributors · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.