Bosch Thermotechnology · Buderus SSB (85-512, discontinued)

Buderus SSB255

Name: Buderus SSB255
Brand: Bosch Thermotechnology

The Buderus SSB255 is a discontinued floor-standing commercial/residential stainless steel condensing boiler rated 255,900 BTU/hr maximum input with 5:1 turndown, 96% AFUE and 206 MBH net rating.

DiscontinuedHistorically in Canada

Service this model Estimate a replacement

Key figures

Max input: 255.9 MBH
Max CSA output: —
AFUE: 96 %
Min input: 51.18 MBH

Natural gasPropaneHeating-onlyresidentialcommercial

Input is gas energy consumed; output is heat delivered. Never size from input alone.

Buderus SSB255 in practice

Best suited to

Applicability and support

Model number: SSB255
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.

See all service areas

Specifications

Published specifications

Values as published by Bosch Thermotechnology. Units are shown with every value; notes flag conflicting sources or missing figures.

Buderus SSB255 specifications
Specification	Value	Note
Input
Input, maximum	255.9 MBH	255,900 BTU/hr; AHRI certified rating.
Input, minimum	51.18 MBH	51,180 BTU/hr.
Output
Heating capacity (AHRI)	237 MBH
Net rating (AHRI)	206 MBH
Efficiency
Efficiency (AFUE)	96 %	AHRI certified ratings row.
Venting and air
Vent/air intake connections	3" (80 mm)	CPVC, PVC, PP, PP Flex and stainless steel AL29-4C (IPEX type IIA and IIB).
Physical and connections
Weight (dry)	198 lb	90 kg.
Dimensions (W × H × D)	23 31/32 × 61 9/16 × 21 21/32 in (609 × 1564 × 550 mm)
Surface heat exchanger	22.0 sq ft (2.0 m²)
Noise rating	46 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	1"
Water connections	1 1/2"
Fuel	Natural gas or propane	Propane requires conversion with the supplied kit.