Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The PBN1302-M9 and PBN1501-M9 cross the 1.3-1.5 million BTU/hr band: 260-1,300 MBH input at 85% efficiency versus 300-1,500 MBH at 84%. The 1501's larger cabinet brings a 6" vent instead of the 1302's 8" vent, and both keep 2-1/2" water connections.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Lochinvar Power-fin PBN1302-M9 | Lochinvar Power-fin PBN1501-M9 |
|---|---|---|
| Heating input, minimum | 260 MBH | 300 MBH |
| Heating input, maximum | 1,300 MBH | 1,500 MBH |
| Gross output | 1,105 MBH | 1,275 MBH |
| Net AHRI water rating | 961 MBH | 1,109 MBH |
| Efficiency (thermal) | 85 % | 84 % |
| Water content | 4.8 gal | 5.5 gal |
| Water connections | 2-1/2" | 2-1/2" |
| Gas connection | 1-1/4" | 1-1/2" |
| Air inlet size | 6" | 6" |
| Vent size | 8" | 6" |
| Turndown | 5:1 | 5:1 |
The PBN1302-M9 prints 260-1,300 MBH input, 1,105 MBH gross output and a 961 MBH net AHRI rating at 85% thermal efficiency; the PBN1501-M9 prints 300-1,500 MBH input, 1,275 MBH gross output and a 1,109 MBH net AHRI rating at 84%.
The 1501's larger heat exchanger and airflow require a 6" air and 6" vent connection, while the 1302 pairs a 6" air connection with an 8" vent; both use 2-1/2" water connections and a 1-1/2" gas connection.
The efficiency step matters on a life-cycle basis: the 1302's printed 85% is one point higher than the 1501's 84%, while the 1501 offers about 170 MBH more gross output.
Lochinvar
The Lochinvar Power-fin PBN1302-M9 is a non-condensing copper-tube vertical commercial boiler rated 260-1,300 MBH input, 1,105 MBH gross output and a 961 MBH net AHRI water rating at 85% thermal efficiency.
Lochinvar
The Lochinvar Power-fin PBN1501-M9 is a non-condensing copper-tube vertical commercial boiler rated 300-1,500 MBH input, 1,275 MBH gross output and a 1,109 MBH net AHRI water rating at 84% thermal efficiency.
The printed product pages show 85% thermal efficiency for the PBN1302-M9 and 84% for the PBN1501-M9.
The PBN1302-M9 uses a 6" air connection and an 8" vent; the PBN1501-M9 uses 6" air and 6" vent connections per the I&O ratings table.
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.