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
The NCC199CDV and NCC300DV are Noritz's commercial tankless water heaters: the NCC199CDV fires 12,800 to 199,900 BTU/h at 0.98 UEF with 11.1 GPM in a 62 lb, indoor-or-outdoor cabinet, while the NCC300DV reaches 300,000 BTU/h with 13.2 GPM in a larger 110 lb indoor-only unit (its page prints no UEF).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Noritz NCC199CDV | Noritz NCC300DV |
|---|---|---|
| Input, minimum | 12.8 MBH | 15 MBH |
| Input, maximum | 199.9 MBH | 300 MBH |
| Uniform Energy Factor (UEF) | 0.98 UEF | Not printed on the product page |
| Flow rate | 0.4 – 11.1 GPM | 0.5 – 13.2 GPM |
| Weight | 62 lb | 110 lb |
| Install location | Indoor & outdoor | Indoor only |
The NCC199CDV and NCC300DV are the two captured models in Noritz's commercial NCC Series, both DHW-only tankless water heaters for commercial domestic hot water. They share 120 VAC power and 0.4/0.5 GPM minimum flows, but differ sharply in size and capacity.
The NCC199CDV uses the residential chassis at 26.1 x 18.1 x 11.8 in and 62 lb, fires 12,800 to 199,900 BTU/h at 0.98 UEF with up to 11.1 GPM, installs indoors or outdoors and prints settings of 100–150°F plus 160°F, 170°F and 185°F steps. The NCC300DV is the larger commercial unit at 32.7 x 18.9 x 14.2 in and 110 lb, fires 15,000 to 300,000 BTU/h with up to 13.2 GPM, is indoor-only, prints 100–185°F settings and publishes no UEF value ("Energy Factor: N/A").
Neither is a boiler: the NCC line heats domestic water for commercial and multi-unit demand, and has no hydronic heating circuit. Sizing follows the facility's peak hot-water demand and fixture count.
Noritz
The Noritz NCC199CDV is a condensing commercial tankless water heater in the NCC Commercial Series — a DHW-only appliance, not a boiler — firing 12,800 to 199,900 BTU/h with 11.1 GPM maximum flow at 0.98 UEF.
Noritz
The Noritz NCC300DV is a commercial tankless water heater in the NCC Commercial Series — a DHW-only appliance, not a boiler — firing 15,000 to 300,000 BTU/h with 13.2 GPM maximum flow.
Capacity and size: 199,900 against 300,000 BTU/h, 11.1 against 13.2 GPM, 62 against 110 lb, and indoor-or-outdoor versus indoor-only installation. The NCC199CDV prints 0.98 UEF; the NCC300DV page prints no UEF value.
No. The NCC Commercial Series is a commercial tankless water heater line for domestic hot water. Noritz's combi boiler is the NRCB.
That depends on the facility's peak demand calculation and fixture count. The NCC300DV's higher ceiling and flow serve larger loads; a licensed contractor should verify the sizing against the installation manual.
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.