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Bosch Thermotechnology · Buderus Stainless Steel Boiler (SSB)

Buderus SSB800 (Gen 1)

The Buderus SSB800 (Gen 1) is a commercial condensing boiler module rated 798 MBH maximum input (79.8 MBH minimum) with 96.8% AHRI thermal efficiency, 772 MBH gross output and 743 lb dry weight.

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Key figures

Max input
798 MBH
Max CSA output
—
AFUE
—
Min input
79.8 MBH
Natural gasPropaneHeating-onlycommercial

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

Buderus SSB800 (Gen 1) in practice

Best suited to

    Applicability and support

    Model number
    SSB800
    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.

    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 SSB800 (Gen 1) specifications
    SpecificationValueNote
    Input
    Input, maximum798 MBH798,000 BTU/hr (234 kW class per sheet); AHRI certified.
    Input, minimum79.8 MBH79,800 BTU/hr.
    Output
    Gross output (AHRI)772 MBH772,000 BTU/hr.
    Net rating (AHRI)671.3 MBH671,300 BTU/hr.
    Efficiency
    Combustion efficiency (AHRI)97.6 %
    Thermal efficiency (AHRI)96.8 %Printed for every SSB size and cascade column in the submittal sheet.
    Venting and air
    Vent/air intake connections6" (160 mm)Twin-pipe or single (concentric or single-pipe) termination, vertical or horizontal.
    Physical and connections
    Water volume13 gal49 l.
    Weight, dry743 lb337 kg.
    Shipping weight836 lb379 kg.
    Dimensions (L × W × H)31.5 × 35.4 × 70.9 in (800 × 900 × 1800 mm)Per the engineering submittal sheet dimension drawings.
    Surface heat exchanger (total)54 sq ft (5.0 m²)
    Maximum allowable working pressure (MAWP)80 psi80 psig per ASME Section IV; each module carries a 75 lb pressure relief valve.
    Maximum operating temperature194 °F90 °C.
    Maximum heat-exchanger temperature210 °F98.9 °C.
    Electrical
    Electrical requirement15.1 FLA120 VAC / 1 phase / 60 Hz; maximum current drawn if all pumps reach rated horsepower.
    Operating limits and other
    Turndown10:1Per the engineering submittal sheet.
    Heat exchangerDual 316L stainless steel heat exchanger modulesGen 1 uses two plasma-welded 316L dual-tube stainless steel modules with independent fan, gas valve, burner tube and circulator per module.
    Gas connection2" NPT
    Water connections3"System supply and return; flanged on the 5" connection.
    FuelNatural gas or propaneFactory set for natural gas; field-convertible to LP with the supplied conversion kit.

    Manuals

    Alerts documented for this model

    None documented yet.

    Services

    Related parts & service

    Questions about the Buderus SSB800 (Gen 1)?

    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.

    Call 778-909-5731Request service

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    Sources and verification

    Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.

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