Lochinvar · Power-Fin (PBN/PBL)
Lochinvar Power-fin PBN2500
The Lochinvar Power-fin PBN2500 is a non-condensing copper-tube vertical commercial boiler rated 2,500 BTU/hr input, 2,175 MBH gross output and a 1,891 MBH net AHRI water rating at 87% thermal efficiency.
Key figures
- Max input
- 2,500 MBH
- Max CSA output
- —
- AFUE
- —
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Lochinvar Power-fin PBN2500 in practice
The Power-fin PBN2500 is the 2,500 BTU/hr size of Lochinvar's non-condensing copper-tube vertical commercial boiler line. The printed rating table lists 2,175 MBH gross output, a 1,891 MBH net AHRI water rating at a piping and pickup allowance of 1.15, 10.4 gallons of water content, 4" water connections, a 2" gas connection and 9" air and 9" vent connections, all at 87% thermal efficiency.
The burner modulates at 5:1 turndown, and the boiler runs on natural gas (PBN) or propane (PBL) with no LP deration printed. The I&O notes that Power-fin boilers require special gas venting — Category II or IV in AL29-4C stainless steel — and that standard units operate from sea level to 4,500 ft with a 4.5% derate per 1,000 ft, while high-altitude builds cover 3,000-5,500 ft. The SMART TOUCH display and CON·X·US remote connect are standard, and the cascading sequencer links up to eight boilers.
Best suited to
- Commercial hydronic loads near 2,500 BTU/hr input
- Buildings replacing an older Power-fin PB or PBN boiler
- Plants that want the printed net AHRI water rating for sizing
Applicability and support
- Model number
- PBN2500
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
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 Lochinvar. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, maximum | 2,500 MBH | Per the PBXT-Sub-07 submittal sizing table. |
| Output | ||
| Gross output | 2,175 MBH | Per the printed sizing table. |
| Net AHRI water rating | 1,891 MBH | Net AHRI rating based on a piping and pickup allowance of 1.15. |
| Efficiency | ||
| Efficiency (thermal) | 87 % | AHRI thermal efficiency per the PBXT-Sub-07 submittal. |
| Venting and air | ||
| Air inlet size | 9" | Per the printed sizing table. |
| Vent size | 9" | Per the printed sizing table. |
| Venting | Category II or IV special gas vent (AL29-4C) | Per the I&O's venting notes; Power-fin boilers require special gas venting. |
| Physical and connections | ||
| Water content | 10.4 gal | Per the printed sizing table (the PBX-PS-05 product summary prints the same water capacities for the 2500-5000 sizes). |
| Water connections | 4" | Per the printed sizing table. |
| Gas connection | 2" | Per the printed sizing table. |
| Shipping weight | 1,470 lb | Per the PBXT-Sub-07 submittal. |
| Operating limits and other | ||
| Turndown | 5:1 | Printed on the model's product page and in the PBXT-Sub-07 submittal's standard features. |
Manuals
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the Power-fin PBN2500 ratings?
The printed rating table lists 2,500 BTU/hr maximum input, 2,175 MBH gross output and a 1,891 MBH net AHRI water rating at 87% thermal efficiency.
What fuel does the Power-fin use?
Natural gas is printed as the PBN model and propane as the PBL model — the ratings tables say "Change 'N' to 'L' for L.P. gas models" with no LP deration.
How is the Power-fin vented?
The I&O requires special gas venting for Power-fin boilers, Category II or IV in AL29-4C stainless steel, with the air and vent connection sizes printed per model in the rating table.
Questions about the Lochinvar Power-fin PBN2500?
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.
Compare and explore
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- Power-Fin (PBN/PBL) series hub
- Buying guide
Sources and verification
- Lochinvar — Power-fin Boiler (PBN2500) model page · accessed September 9, 2026
- Power-Fin Gas Boilers, Models PB 2500-PB 5000 Submittal Sheet, PBXT-Sub-07 · PBXT-Sub-07 · accessed September 9, 2026
- Power-Fin Boiler Product Summary, PBX-PS-05 · PBX-PS-05 · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.