Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Noble NCF110 and NCF150 are the two smaller floor-standing Noble combis and mirror the wall NKC step: the 150 fires 15 to 150 MBH with 139 MBH of DOE capacity against the 110's 102, and its 2" vent allowance drops from 100 to 60 equivalent feet while connections stay 1" NPT and 3/4" DHW.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Lochinvar Noble NCF110 | Lochinvar Noble NCF150 |
|---|---|---|
| Heating input, minimum | 11 MBH | 15 MBH |
| Heating input, maximum | 110 MBH | 150 MBH |
| DOE heating capacity | 102 MBH | 139 MBH |
| AHRI net water rating | 89 MBH | 121 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Water content | 1.4 gal | 2 gal |
| Space-heating water connections | 1" NPT | 1" NPT |
| DHW water connections | 3/4" | 3/4" |
| Gas connection | 1/2" | 1/2" |
| Max. equivalent vent/air length, 2" | 100 ft | 60 ft |
| Max. equivalent vent/air length, 3" | 100 ft | 100 ft |
| Domestic hot water | On demand from the combi's DHW circuit | On demand from the combi's DHW circuit |
Both NCF models are floor-standing Noble combis producing domestic hot water on demand through 3/4" DHW connections, with 1" NPT space-heating connections, a 1/2" gas connection and 95.0% AFUE — the floor counterparts of the NKC110 and NKC150 ratings.
The NCF110 page quotes DHW of up to 2.6 GPM at a 77°F rise, and the NCF150's spec format does not print a DHW flow, so the step between them is best read as heating capacity: DOE output rises from 102 to 139 MBH.
Venting follows the wall combis: the 110 allows 2" pipe to 100 equivalent feet and the 150 only to 60, with 3" at 100 feet on both. Water content grows from 1.4 to 2.0 gallons on the larger model.
Lochinvar
The Noble NCF110 is the entry Noble floor-standing combi: 11 to 110 MBH input at 95.0% AFUE, rated for DHW of up to 2.6 GPM at a 77°F rise, on a 290 lb floor cabinet.
Lochinvar
The Noble NCF150 is the 150 MBH floor-standing Noble combi: 15 to 150 MBH input at 95.0% AFUE with 139 MBH DOE capacity and on-demand DHW through 3/4" connections.
Input rises from 11-110 MBH to 15-150 MBH, DOE capacity from 102 to 139 MBH and water content from 1.4 to 2.0 gallons; the 2" vent allowance shortens from 100 to 60 equivalent feet.
In ratings and connections, yes — the NCF models are the floor-standing versions of the wall-mounted NKC combis, sharing the Noble ratings rows in the I&O 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 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.