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Upton floor standing condensing modular boiler

The Upton is an ErP-compliant floor standing condensing modular boiler able to deliver an output of over 1MW from less than 1m² of footprint. It features a precision-engineered and resilient aluminium heat exchanger with quick heat up times and a gross seasonal efficiency of up to 97%. The boiler is available in 6 stackable modules with a turndown ratio of 5:1 with outputs ranging from 98 up to 348kW output. Single modules can be stacked vertically allowing up to 18 boiler module combinations. If stacked, the boiler’s turndown ratio increases from 5:1 to 15:1 for more accurate load matching and less energy wastage. All boiler modules benefit from identical water and gas connections (size and position) which allows for easy design changes if more output is required.

Together with the Upton’s low NOx emissions (<40 mg/kWh) and low noise levels, it is an ideal choice for restricted access city centre plant rooms or adjoining quiet areas.

Installation Options

The boiler modules can be stacked 1-, 2- or 3-high which offers flexible installation options for more challenging plant rooms. The built-in modern Siemens LMS platform allows control of cascade arrangements of up to 16 boiler modules.

  • Tested 6 bar rated precision-engineered aluminium heat exchanger with 5-year warranty
  • Up to 97% gross seasonal efficiency
  • Over 1MW output from less than 1m² of footprint
  • Fully modulating with a turndown ratio of 5:1 per module for accurate load matching
  • Low NOx emissions (<40mg/kWh)
  • Built-in advanced sequence control for cascade arrangements of up to 16 boiler modules
  • Combustion analysis and drain point at front of the boiler for easy servicing and system cleaning
  • Boiler modules easy to separate and transport to point of use, even in difficult to access city centres
  • Pipework kits available to simplify design and installation
  • Optional low loss header with integrated air and dirt separator for increased system performance available

Parametric 3D BIM (Building Information Modelling) models for all Upton boiler models are available from the Hamworthy website: building-information-modelling

Pipework kits

Specifically designed pipework kits for the Upton are available. These include optional matched boiler pumps and allow cascade installations with an output of up to 4.2MW.

  • Four sizes of factory assembled pipework kits available
    DN100 (100/150kW) 12 modules 1.8MW • DN150 (200/250kW) 12 modules 3.0MW • DN150* (300/350kW) 6 modules 2.1MW (*with larger pump) • DN200 (300/350kW) 12 modules 4.2MW
  • Gas manifold
  • Condensate drain pipework
  • Optional matched pumps
  • Boiler safety relief valves
  • Automatic air vents
  • Optional blanking plate with tappings for system safety relief valve and pressurisation unit
  • Optional low loss header with integrated air and dirt separator
  • Optional 3 port manifold extension


  • Built-in advanced Siemens LMS controls as standard
  • Boiler sequencing cascade controller
  • Room & outside temperature sensors
  • LPB bus communications modules
  • DHW cylinder sensor kit

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