Bosch Thermotechnology · Buderus SSB (85-512, discontinued)
Buderus SSB120
The Buderus SSB120 is a discontinued wall-hung commercial/residential stainless steel condensing boiler rated 119,420 BTU/hr maximum input with 5:1 turndown, 96% AFUE and 96 MBH net rating.
Key figures
- Max input
- 119.42 MBH
- Max CSA output
- —
- AFUE
- 96 %
- Min input
- 23.884 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Buderus SSB120 in practice
Best suited to
Applicability and support
- Model number
- SSB120
- 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 Bosch Thermotechnology. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, maximum | 119.42 MBH | 119,420 BTU/hr; AHRI certified rating. |
| Input, minimum | 23.884 MBH | 23,884 BTU/hr. |
| Output | ||
| Heating capacity (AHRI) | 110 MBH | |
| Net rating (AHRI) | 96 MBH | |
| Efficiency | ||
| Efficiency (AFUE) | 96 % | AHRI certified ratings row. |
| Venting and air | ||
| Vent/air intake connections | 2" (60 mm) | CPVC, PVC, PP, PP Flex and stainless steel AL29-4C (IPEX type IIA and IIB). |
| Physical and connections | ||
| Weight (dry) | 132 lb | 60 kg. |
| Dimensions (W × H × D) | 20 × 47 1/2 × 15 3/8 in (508 × 1206 × 388 mm) | |
| Surface heat exchanger | 10.76 sq ft (1.0 m²) | |
| Noise rating | 44 dB | |
| Maximum allowable working pressure (MAWP) | 80 psi | 80 psi (5.5 bar). |
| Maximum operating temperature | 194 °F | 90 °C. |
| Operating limits and other | ||
| Turndown | 5:1 | |
| Heat exchanger | Stainless steel condensing heat exchanger | ASME Section IV construction; CSA, ASME and AHRI listed. |
| Gas connection | 3/4" NPT | |
| Water connections | 1" | |
| Fuel | Natural gas or propane | Propane requires conversion with the supplied kit. |
Manuals
- SSB85/120/160 Installation Instructions (doc 6720818456, 06.2018 US)6720818456 · 2018-06
- SSB85/120/160 Service Manual (doc 6720866940, 11.2017 US)6720866940 · 2017-11
Alerts documented for this model
Questions about the Buderus SSB120?
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
- Bosch Home Comfort US — Commercial Products - Discontinued: Discontinued Boilers · accessed September 9, 2026
- SSB85/120/160 Installation Instructions (6720818456) · accessed September 9, 2026
- Buderus SSB Stainless Steel Boiler Brochure (75h995352, 08.2017) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.