Boilers

Modutherm offers a comprehensive range of commercial boilers including wall hung and floor standing gas condensing boilers (32-1156kW) and electric boilers (36-504kW).

Our Genesis range features stainless steel heat exchangers, modular configurations, and high-efficiency performance for commercial heating applications. The Genesis Eco electric boiler range delivers 99.9% efficiency for zero-carbon heating solutions.

Suitable for schools, hotels, care facilities, apartment buildings, and commercial properties, Modutherm boilers provide reliable, powerful heating for new builds, refurbishments, and hybrid heating systems across the UK.

Condensing Boilers

Modutherm's Genesis condensing boiler range includes wall mounted and floor standing models with outputs from 32-1156kW. Featuring stainless steel heat exchangers and modular configurations, these high-efficiency gas boilers deliver reliable commercial heating for schools, hotels, care homes, and apartment buildings.

Available in the Genesis 32 (32kW system and combi), Genesis WM wall hung (41-149kW), Genesis FS floor standing (124-300kW), and Genesis FS Plus (318-1156kW), our condensing boilers provide powerful, efficient heating solutions for commercial properties across the UK.

Genesis 32

  • Wall mounted
  • Efficiency of up to 108% net
  • Available in 2 models
    (System & Combi)
  • Stainless steel heat exchanger
A
Energy
Class
8:1
Modulation Ratio
32 kW
Output

Genesis WM

  • Wall mounted
  • Efficiency of up to 108% net
  • Stainless steel heat exchanger
  • Cascadable up to 6 units
A
Energy
Class
10:1
Modulation Ratio
41-149 kW
Output
Range

Genesis FS

  • Floor standing
  • Efficiency of up to 108% net
  • Stainless steel heat exchanger
  • Cascadable up to 16 units
10:1
Modulation
Ratio
124-300 kW
Output
Range

Genesis FS Plus

  • Floor standing
  • Efficiency of up to 108% net
  • Stainless steel heat exchanger
  • Cascadable up to 16 units
  • Achieves 2 BREEAM credits
7:1
Modulation
Ratio
318-1156 kW
Output
Range

Electric Boilers

Modutherm's Genesis Eco electric boiler range delivers 99.9% efficiency with outputs from 36-504kW across 13 floor standing models. Featuring modular configurations and zero-carbon operation, these commercial electric boilers provide reliable heating for schools, offices, apartment buildings, and commercial properties.

Ideal for new builds, hybrid heating systems, and applications without gas supply, Genesis Eco electric boilers offer a sustainable, low-maintenance heating solution for commercial heating projects across the UK.

Genesis Eco

  • Floor standing
  • 99.9% efficiency
  • 3 models available (S/M/L)
  • 13 sizes available
36-504 kW
Output
Range

Instantaneous Hot Water Production

For applications requiring on-demand hot water without storage, Modutherm offers the CoilMaster floor-standing gas-fired water heater/boiler. The CoilMaster provides efficient instantaneous domestic hot water production for hotels, leisure facilities, and large commercial buildings.

CoilMaster

  • Floor standing gas fired water heater/boiler
  • Efficiency of up to 108% net
  • Stainless steel heat exchanger
  • Up to 1830 L/h of DHW at 60°C
C
Energy
Class
10:1
Modulation Ratio
37-124 kW
Output
Range

Case Studies

FAQs
Why does heat exchanger material matter in a commercial boiler?
The heat exchanger is the component through which combustion gases transfer heat into the heating circuit. Stainless steel heat exchangers offer superior resistance to corrosion compared to cast iron or aluminium alternatives, which is particularly important in condensing boilers where acidic condensate is produced during operation. All Genesis condensing boilers feature stainless steel heat exchangers, contributing to long-term reliability and reduced maintenance requirements.
What is a modular boiler configuration?
A modular configuration uses multiple boilers operating together as a single system, allowing output to be matched closely to demand at any given time. When heating loads are low, only one or two units fire; as demand increases, additional modules are brought on. This avoids the inefficiencies associated with a single large boiler cycling on and off at partial load, and also provides built-in redundancy — if one unit requires servicing, the remaining modules can continue to provide heat.
Are commercial boilers suitable for use alongside heat pumps?
Gas boilers can be integrated with air source heat pumps in a hybrid heating system. In such arrangements, the heat pump handles the base load at higher efficiency, with the boiler providing supplementary output during periods of peak demand or very low outdoor temperatures. This is a practical approach for buildings where a full heat pump system is not yet viable, allowing decarbonisation to be phased over time.
What maintenance does a commercial boiler require?
Commercial gas boilers should be serviced annually by a Gas Safe registered engineer. Routine maintenance typically includes inspection of the heat exchanger, burner, flue, condensate trap, and controls, as well as combustion analysis to verify efficient operation. The stainless steel heat exchangers in the Genesis range are designed to minimise corrosion-related issues, but regular servicing remains essential to maintain efficiency, safety, and warranty cover.
What does ErP mean in relation to commercial boilers?
ErP stands for Energy-related Products, referring to the EU directive that sets minimum energy efficiency standards for heating appliances. Under ErP, boilers are rated on a seasonal efficiency scale, with higher-rated products carrying lower running costs and a smaller carbon footprint. All Modutherm Genesis condensing boilers comply with ErP requirements, with the stainless steel heat exchanger design contributing to high seasonal efficiency across a wide range of operating conditions.

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