/, Contextual, DHW, Heating, HVAC, Long term, Owners, Physical environmental, Psychological/2.2.23 Install small modular boilers

2.2.23 Install small modular boilers

2.2.23 Install small modular boilers


Modular boilers are designed as an alternative to large single boilers and offer a very efficient approach to tertiary heating.  Each module can be a separate boiler installed alongside another in a horizontal arrangement, or as a vertical stack of boiler modules one above another.


  • It is more efficient to operate smaller boilers when the heating load is 25% to 50% of the design capacity than it is to use one large boiler to meet a partial load

  • Easier to install

  • Increase system security

  • Load matching and control

  • Cost reduction and energy savings


  • Managers should employ controls to stage the boilers on as required to match the load

Economic assessment

The drawback to install multiple high-efficient boilers is the large initial capital cost. Often a high-efficient boiler is two to three times the cost of a similar capacity mid-efficient boiler. In many cases using a combination of high efficient and mid-efficient boilers in a boiler plant can achieve the same efficiency performance as a system with all high-efficient boilers.

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Environment or playable world:

  • Residential

  • Academic

  • Offices

  • All

Carried out by:

  • Public building users

  • Owners

  • Operators

  • All

Reduce consumption of:

  • Heating

  • Cooling

  • DHW

  • Lighting

  • Electric devices

Type of driver:

  • Physical environmental

  • Contextual

  • Psychological

  • Physiological

  • Social

Time framework:

  • Short term
  • Long term

Type of measure:

  • Envelope
  • HVAC
  • DHW
  • Lighting
  • Electrical devices
  • Other
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