Lochinvar · SYNC (SBN, discontinued)
Lochinvar SYNC SBN1000
The Lochinvar SYNC SBN1000 is a discontinued commercial condensing boiler rated 100-1,000 MBH input with 941 MBH gross output and an 818 MBH net AHRI water rating, documented on Lochinvar's "Series Discontinued" support page.
Key figures
- Max input
- 1,000 MBH
- Max CSA output
- —
- AFUE
- —
- Min input
- 100 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Lochinvar SYNC SBN1000 in practice
The SYNC SBN1000 is the 100-1,000 MBH size of Lochinvar's previous-generation commercial condensing boiler. The I&O Rev AA ratings table prints 941 MBH gross output, an 818 MBH net AHRI water rating, 8.4 gallons of water content, 3" outlet and (2)-2" inlet water connections, a 1-1/2" gas connection and 6" air and vent sizes.
Lochinvar keeps the SYNC support page live under a "Series Discontinued" banner with the I&O, service and user manuals, so owners can still identify the unit and its control. The I&O notes state that standard boilers operate from sea level to 4,500 ft with a 4% derate per 1,000 ft, and that high-altitude builds cover 3,000-12,000 ft with a 2% derate per 1,000 ft. The SYNC's commercial role is filled today by the FTXL and Crest lines.
Best suited to
- Buildings with an installed SYNC SBN1000 that needs its ratings identified
- Owners matching a discontinued SYNC to its archived I&O manual
- Repair-or-replace decisions comparing the SYNC with current FTXL/Crest sizes
Applicability and support
- Model number
- SBN1000
- Canadian availability
- historical
- Production status
- discontinued
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
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 | 100 MBH | Per the SYNC I&O Rev AA ratings table. |
| Heating input, maximum | 1,000 MBH | Per the SYNC I&O Rev AA ratings table. |
| Output | ||
| Gross output | 941 MBH | Per the SYNC I&O Rev AA ratings table. |
| Net AHRI water rating | 818 MBH | Net AHRI rating based on a piping and pickup allowance of 1.15. |
| Venting and air | ||
| Air size | 6" | Per the SYNC I&O Rev AA ratings table. |
| Vent size | 6" | Per the SYNC I&O Rev AA ratings table. |
| Physical and connections | ||
| Water content | 8.4 gal | Per the SYNC I&O Rev AA ratings table. |
| Outlet / inlet water connections | 3" / (2)-2" | Per the SYNC I&O Rev AA ratings table. |
| Gas connection | 1-1/2" | Per the SYNC I&O Rev AA ratings table. |
| Operating limits and other | ||
| Altitude | Sea level to 4,500 ft standard; high-altitude build 3,000-12,000 ft | Per the I&O notes: 4% derate per 1,000 ft above sea level standard, 2% per 1,000 ft on high-altitude builds. |
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the SYNC SBN1000 ratings?
The I&O Rev AA ratings table prints 100-1,000 MBH input, 941 MBH gross output, an 818 MBH net AHRI water rating and 8.4 gallons of water content.
Is the SYNC still sold?
No. Lochinvar's support page carries a "Series Discontinued" banner for the SYNC Condensing Boiler; the current commercial condensing lines are the FTXL and Crest.
Where is the SYNC manual?
Lochinvar still hosts the SYNC Installation & Operation Manual (Rev AA), the service manual (Rev K) and the user manual (Rev F) from the SBN1000 support page.
Questions about the Lochinvar SYNC SBN1000?
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.
Sources and verification
- Lochinvar — Series Discontinued: SYNC Condensing Boiler, Model SBN1000 support page · accessed September 9, 2026
- SYNC Condensing Boiler Installation & Operation Manual, Rev AA · Rev AA · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.