Unlocking opportunities through Retrofit Methods

Retrofitting existing buildings has emerged as a crucial strategy in addressing climate change, reducing energy consumption, and enhancing the sustainability of our built environment. By updating and improving existing structures, we can unlock numerous opportunities for energy efficiency, occupant comfort, and environmental responsibility. This blog post explores the importance of retrofit methods, showcases compelling case studies, and highlights VEXO’s innovative products that facilitate successful retrofitting projects. 

The Importance of Retrofit Methods 


The majority of buildings that will exist in 2050 are already built today, making retrofitting an essential component in achieving our net-zero carbon goals. Retrofitting involves updating building systems, improving insulation, and integrating modern technologies to reduce energy consumption and carbon emissions. This approach not only extends the life of existing structures but also enhances their functionality and efficiency. 

Case Studies

  1. Ayr St Columba Church Retrofit
    The retrofit of Ayr St Columba Church demonstrates how historical buildings can be transformed to meet modern energy standards. Built in 1898, the church faced significant energy inefficiencies due to its age and design. The retrofit project focused on improving insulation, upgrading heating systems, and optimising energy use. By addressing the U-values of different building elements and integrating modern heating controls, the project achieved substantial reductions in gas consumption and carbon emissions.
  1. Implementation of Passivhaus in Large-Scale Urban Developments
    Dr. Terry Keech and Emily Mansfield presented two case studies on implementing Passivhaus principles in large-scale urban developments in Central London. These projects highlighted the benefits of a fabric-first approach, which features insulation and airtightness before adding active heating systems. The results showed a 45% reduction in CO2 emissions compared to standard building regulations, with significant cost savings in energy use. Despite the initial increase in construction costs, the long-term benefits for both occupants and the environment were clear.
  1. Commercial Retrofit Challenge: A Corporate Perspective
    Elinor Huggett and Michelle Wang from Deloitte discussed the challenges and opportunities of retrofitting commercial office spaces. Their work demonstrated the importance of accurate data collection, landlord-tenant collaboration, and the role of technology in enhancing building performance. By integrating green lease clauses and fostering proactive relationships with landlords, they were able to overcome common barriers to effective retrofitting and drive significant improvements in energy efficiency and sustainability. 

VEXO’s Innovative Retrofit Products

  1. VEXO X-POT:
    The X-POT is a multifunctional side stream filtration unit that enhances the efficiency of heating and cooling systems. By removing debris, sludge, and scale, it improves system performance and reduces maintenance costs, making it an ideal solution for retrofit projects. 
  1. VEXO Y-MAG:
    The Y-MAG is a magnetic y-type strainer designed to protect HVAC systems from magnetic debris. It enhances system longevity and efficiency by keeping the filter mesh free of ferrous particles, thereby preventing blockages and maintaining optimal flow rates. This product is particularly beneficial in retrofit projects where existing systems may have accumulated debris over time. 
  1. VEXO S-BMS:
    S-BMS (Smart Building Management System) is an advanced control system that integrates various building systems for optimal performance. It provides real-time monitoring, data analytics, and automated controls to enhance energy efficiency and occupant comfort. S-BMS is ideal for retrofitting projects as it can seamlessly integrate with existing infrastructure with minimal wiring, providing a comprehensive solution for modern building management. 

For more information on reducing embodied carbon with our innovative products, book a demo or get in touch with our technical team. 



Evaluating the performance of six 1970s off-gas deep retrofit bungalows. CIBSE Technical Symposium, UK April 2024. 

Refurbishment and Retrofit of Churches – A Case Study of Ayr St Columba Church. CIBSE Technical Symposium, UK April 2024. 

Implementation of Passivhaus into Large Scale Urban Developments. CIBSE Technical Symposium, UK April 2024. 

The Commercial Retrofit Challenge through an Occupier Lens. CIBSE Technical Symposium, UK April 2024. 

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