Lochinvar · Power-Fin (PBN/PBL)
Lochinvar Power-fin PBN1701-M9
The Lochinvar Power-fin PBN1701-M9 is a non-condensing copper-tube vertical commercial boiler rated 340-1,700 MBH input, 1,445 MBH gross output and a 1,257 MBH net AHRI water rating at 84% thermal efficiency.
Key figures
- Max input
- 1,700 MBH
- Max CSA output
- —
- AFUE
- —
- Min input
- 340 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Lochinvar Power-fin PBN1701-M9 in practice
The Power-fin PBN1701-M9 is the 340-1,700 MBH size of Lochinvar's non-condensing copper-tube vertical commercial boiler line. The printed rating table lists 1,445 MBH gross output, a 1,257 MBH net AHRI water rating at a piping and pickup allowance of 1.15, 5.8 gallons of water content, 2-1/2" water connections, a 1-1/2" gas connection and 7" air and 7" vent connections, all at 84% 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 1,700 MBH 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
- PBN1701-M9
- 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, minimum | 340 MBH | Per the I&O Rev A ratings table (M9 firing). |
| Heating input, maximum | 1,700 MBH | Per the I&O Rev A ratings table. |
| Output | ||
| Gross output | 1,445 MBH | Per the printed sizing table. |
| Net AHRI water rating | 1,257 MBH | Net AHRI rating based on a piping and pickup allowance of 1.15. |
| Efficiency | ||
| Efficiency (thermal) | 84 % | Thermal efficiency printed on the model's product page. |
| Venting and air | ||
| Air inlet size | 7" | Per the printed sizing table. |
| Vent size | 7" | 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 | 5.8 gal | Per the printed sizing table (the PBX-PS-05 product summary prints the same water capacities for the 2500-5000 sizes). |
| Water connections | 2-1/2" | Per the printed sizing table. |
| Gas connection | 1-1/2" | Per the printed sizing table. |
| 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 PBN1701-M9 ratings?
The printed rating table lists 1,700 MBH maximum input, 1,445 MBH gross output and a 1,257 MBH net AHRI water rating at 84% 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 PBN1701-M9?
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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- Lochinvar Power-fin PBN1302-M9Same series
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- Lochinvar Power-fin PBN2001-M9Same series
- Lochinvar Power-fin PBN2500Same series
- Lochinvar Power-fin PBN3000Same series
- Lochinvar Power-fin PBN3500Same series
- Lochinvar Power-fin PBN4000Same series
- Lochinvar Power-fin PBN5000Same series
- Power-Fin (PBN/PBL) series hub
- Buying guide
Sources and verification
- Lochinvar — Power-fin Boiler (PBN2001-M9) model page · accessed September 9, 2026
- Power-Fin Boilers 502-2001 Installation & Operation Manual, Rev A · Rev A · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.