Heat Pumps & Low-Carbon Heating

Low-Temperature Heating System Conversion

A low-temperature heating system conversion adapts your existing central heating so it can run efficiently at lower flow temperatures, as required for most heat pumps. The goal is steady, comfortable heat with better system efficiency, achieved through careful checks, targeted upgrades, and correct controls and commissioning.

More information

What a low-temperature heating conversion covers

This service prepares an existing wet central heating system for low-temperature operation, so it can work effectively with a heat pump or as a step towards one.

  • Heat loss and system suitability checks to confirm targets and constraints
  • Radiator and emitter assessment, with recommendations for upgrades where needed
  • Pipework and hydraulic review to support correct flow rates and balanced circuits
  • Hot water cylinder and ancillary equipment checks where relevant
  • Control strategy review, including weather compensation and zoning options
  • System flushing, filtration and water quality improvements (where required)
  • Commissioning and optimisation for stable low-temperature performance

When this service is the right fit

This is most relevant if you are planning a heat pump, have already fitted one but it is underperforming, or you want lower running temperatures to improve comfort and efficiency. It also suits landlords and small commercial sites that need predictable performance and clear documentation for maintenance and compliance.

How the conversion is delivered

Work starts with a technical survey to understand heat demand, existing emitters, pipework and controls. You then receive a clear scope of works, outlining what must change versus what can remain.

Installation typically focuses on the parts that limit low-temperature performance, such as undersized radiators, poor balancing, inadequate controls, or dirty system water. The final stage is commissioning: setting temperatures and controls correctly, balancing circuits, and confirming performance room by room.

What happens after installation

You receive practical handover guidance on how to run a low-temperature system day to day, including control settings and what to monitor. Follow-up optimisation can be arranged after the system has been lived in, to fine-tune schedules, flow temperatures and balancing for best comfort and efficiency.

Frequently Asked Questions

What is a low-temperature heating system conversion?
It is a set of checks and upgrades that allow your central heating to deliver the required heat at lower flow temperatures. This is essential for most heat pumps and can also improve comfort by providing steadier heat.
Will I need to replace all my radiators?
Not always. Each room is assessed for heat demand and radiator output at lower temperatures, then only the emitters that cannot meet demand are recommended for upgrade.
Can you convert my system before I install a heat pump?
Yes. Converting first can reduce risk and cost later by confirming what needs changing and improving overall system readiness. It can also make the eventual heat pump installation and commissioning smoother.
Why do controls matter for low-temperature heating?
Low-temperature systems rely on longer, steadier run times and accurate temperature control. Correct settings, zoning, and features like weather compensation can significantly affect comfort and running efficiency.
How do you check if my current pipework and system water are suitable?
Pipework is reviewed for layout, balancing and likely flow performance, as these affect heat delivery at lower temperatures. System water quality is checked and improvements like flushing or filtration may be recommended to protect equipment and maintain efficiency.

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