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 CBN2067 and CHN2072 are the two largest Copper-Fin boilers, both rated just over 2.0 million BTU/hr input: the fan-assisted CBN2067 is 84% with two-stage firing and a 14" vent, while the Copper-Fin II CHN2072 is 85% with proportional firing up to 4:1, the SMART SYSTEM cascade control and a 14" vent with a 12" air inlet.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Lochinvar Copper-Fin Fan Assisted CBN2067 | Lochinvar Copper-Fin II CHN2072 |
|---|---|---|
| Heating input, minimum | 990 MBH | 630 MBH |
| Heating input, maximum | 2,065 MBH | 2,070 MBH |
| Gross output | 1,735 MBH | 1,760 MBH |
| Net AHRI water rating | 1,508 MBH | 1,530 MBH |
| Efficiency (thermal) | 84 % | 85 % |
| Water content | 4.3 gal | 4.3 gal |
| Space-heating water connections | 2-1/2" | 2-1/2" |
| Gas connection | 2" | 2" |
| Air inlet size | — | 12" |
| Vent size | 14" | 14" |
| Firing | Two-stage (high/low fire) | Proportional, up to 4:1 turndown |
| Shipping weight | 1,350 lb | 1,219 lb |
The two top sizes differ by just 5 MBH of input: the CBN2067 fires 990 to 2,065 MBH with 1,735 MBH gross output and a 1,508 MBH AHRI net rating, while the CHN2072 fires 630 to 2,070 MBH with 1,760 MBH gross output and a 1,530 MBH AHRI net rating. The Copper-Fin II fires 360 MBH lower at minimum.
Efficiency is one point apart at 84% versus 85% (AHRI certified), and the controls are a generation apart: the CBN2067 uses a two-stage electronic temperature control, while the CHN2072 carries the SMART SYSTEM control with a built-in cascading sequencer for up to 8 boilers, front-end loading with Crest or Knight, BMS integration and 0-10 VDC rate output.
Both use 2-1/2" NPT water connections on 11-1/4" centers and a 2" gas connection, with a 14" vent; the CHN2072's submittal prints a 12" air inlet where the fan-assisted line pairs the 14" vent with its own air arrangement. The CHN2072 weighs 1,219 lb against the CBN2067's 1,350 lb, and both submittals print 10-year heat-exchanger warranties.
The Copper-Fin Fan Assisted CBN2067 tops the line at 990 to 2,065 MBH input with 1,735 MBH gross output and a 1,508 MBH AHRI net rating at 84% thermal efficiency.
Lochinvar
The Copper-Fin II CHN2072 tops the line at 630 to 2,070 MBH input with 1,760 MBH gross output and a 1,530 MBH AHRI net rating at 85% thermal efficiency.
By printed input the Copper-Fin II CHN2072 is the largest at 2,070 MBH, with the fan-assisted CBN2067 5 MBH behind at 2,065 MBH; the CHN2072 also has the higher gross output at 1,760 MBH.
The Copper-Fin II CHN2072 at 85% thermal efficiency (AHRI certified), against 84% on the fan-assisted CBN2067.
The CHN2072 with the SMART SYSTEM control, 8-boiler cascade and proportional firing up to 4:1; the CBN2067 uses a two-stage electronic temperature control.
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.