Low Carbon Heat Checker

Request your free low carbon heat performance assessment.



Making Public Buildings Low Carbon Ready - with Newcastle City Council.


5 Ingredients for a succesful heat pump deployment in your public buildings.


Share your view on the topic of energy costs and net zero carbon.

Case Study

Discover our case study with Newcastle City Council.

How Hysopt can help with our Low Carbon Heat Checker:

Is your PSDS low carbon heat installation delivering everything you expected?

Hysopt has partnered with Twelvetrees Consulting to offer a new service to help health, education and public sector organisations get a better understanding of how their recent low carbon heat installations are actually performing once operational.

The Public Sector Decarbonisation Scheme has awarded more than £2 billion across more than 900 projects including support for installation of heat pumps to replace end of life gas boilers. 

All too often, however, many of these solutions under-perform against design predictions due to insufficiently well-thought-out engineering design and failure to ensure existing heating installations are made “low carbon heat ready” first.

Evidence from official reporting reveals that under PSDS phase 3a: 

  • 85% of heating installations were not optimised 
  • 70% of installations went ahead without optimisation of distribution systems 
  • 62% of installations did not upgrade BMS controls 

Typically this leads to Performance Gaps in the form of missed carbon savings and higher than necessary energy costs. 

Hysopt - Hydronic System Optimisation Logo
Request Low Carbon Heat Check Assessment

Take advantage of unparalleled expertise in optimising heating systems with our FREE low carbon heat checker service.

Through a thorough review of your as-built documentation and meter data from the first year of operation, the Low Carbon Heat Checker report will help you understand where the performance of your installation can be improved; and provide you with all the metrics you need to take actionable steps to close any performance gaps identified.

Previous Succes Stories

Public sector clients already benefiting from the use of Hysopt hydraulic digital twin modelling in their low carbon heat project.

Less risk, lower cost and more certainty with Hysopt!

One of the greatest 2050 Net Zero targets is decarbonising the way buildings are heated. Most public buildings still rely on fossil fuel-based heating. Since these approaches are end of life, it is an ideal opportunity to transition to a low carbon approach.

Low carbon heating and cooling measures, such as heat pumps and low carbon heat networks, have the potential to deliver immediate carbon savings, but they are not a like-for-like replacement for gas boilers. Experience from previous funding rounds has already shown the opportunity for good practice system design is being missed. 

Public sector clients tell us that decarbonising heat is complex, costly and risky due to uncertainty about how systems will perform once they’re installed.

Too often the chance for best-practice system design is being missed, while the opportunity to optimise existing systems – especially in older buildings – to make them “low carbon heat ready” is not well understood.

Hysopt's CIBSE Award Winning HVAC Ditigal Twin software optimises new system designs to:

Make the right choices in the engineering phase

Deliver the design intent into the as build installation

Deliver on carbon saving objectives

“First time right” installation performances

Supporting your Low Carbon Heat Journey

Developing a Heat Decarbonisation Plan or applying for the next phase of PSDS, Heat Network Efficiency Scheme, Green Heat Network Fund or the Scottish Public Sector Green Heat Decarbonisation Fund?

Speak to us about how we can help support your bid with evidence-based performance details for your planned installation.

Hysopt Conceptual Study

Our conceptual optimisation study will create a full digital model of your current installation, complete with dynamic simulations of low carbon heat options will perform.

Our powerful Pareto Analysis Tool will provide an objective comparison on different design options against a range of KPI's and performance metrics, providing detailed evidence to support your PSDS bid or underpin your heat decarbonisation plan.

Why use Hysopt in your Low Carbon Heat Project?

  • Lowest possible running costs;
  • Optimised capital investment costs;
  • Highest possible carbon savings;
  • Science based performance metrics and £/tCO2 savings at the bid/design stage;
  • Significantly enhanced chance of bid success;


Newcastle City Council

Scheme:  Academy secondary school – Gas boiler to heat pump upgrade 

Prior to Hysopt modelling:  proposal to install 1MW high temperature heat pumps, capex circa £1.5m 

What did Hysopt modelling prove?

  • Installation of high temperature heat pumps at high flow temps would double energy costs vs existing gas system, due to very poor seasonal efficiency (SCOP <2); 
  • Optimisation of the existing heat distribution system and taking advantage of oversizing in current installation allowed operation at lower flow temperatures, allowing “standard” temperature heat pumps to be installed; 
  • Optimisation of the control strategy could reduce peak demands further still; 
  • Results in lower upfront capex costs (£800k saving) and running costs on a par with existing gas boilers, due to much higher heat pump seasonal efficiency 
  • Cost per tonne CO2 reduced from >£750/tCO2 to <£250/tCO2 


5 ingredients for successful deployment of heat pumps into non-domestic buildings

Want to learn more about how you can sucessfully deploy heat pumps in non-domestic buildings in relation to the Public Sector Decarbonisation Scheme?

Request your FREE Low Carbon Heat Check

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