The Story
My Home Retrofit delivered a whole-house deep retrofit for Wray Vicarage, designed to reduce energy demand, improve comfort, and modernise the home with future-ready systems.
The project began with a Home Retrofit Plan and detailed feasibility work to determine the most effective combination of upgrades. This included full mechanical and electrical design, fabric performance modelling, and system integration planning.
The final design incorporated coordinated measures across the building fabric, ventilation, heating, and renewable power generation, delivering a complete low-energy transformation while minimising disruption to residents.
Project Overview
150M2
Floor Area
£45,000
Project Value
£33,500
Value Added
£7500
Grants
£2,531
Energy Saving PA
4.1 tCO2
Carbon Saving
4.5 Years
Payback Period
A
New EPC Rating
Fabric Upgrades
Cavity wall insulation (mineral wool top-up) and 150mm loft insulation were installed to reduce heat loss through the building envelope and maintain more stable indoor temperatures.
Additional airtightness improvements were carried out around windows, doors, loft access, and service penetrations to minimise draughts and heat loss.
Mechanical Ventilation System
A mechanical ventilation system was installed to maintain healthy indoor air quality while supporting the improved airtightness of the building.
Air Source Heat Pump
A new MCS-certified air source heat pump was installed to replace the legacy fossil fuel heating system, providing efficient, low-carbon heating and hot water.
Internal and external plant room upgrades were included to optimise performance and space utilisation.
Airtightness Improvements
Draught proofing works were completed to windows, doors, external penetrations, loft access points and ceiling light fittings to significantly reduce infiltration.
Solar PV and Battery Storage
A 4.5 kWp MCS-certified solar PV system and 7 kWh battery storage unit were added to generate renewable electricity, improve self-consumption, and reduce reliance on the grid.
Energy Monitoring Kit
An integrated Emporia energy monitoring system was fitted to track heat pump, PV, and electricity performance data, enabling ongoing optimisation and performance analysis.
Conclusion
This project demonstrates Mantis’ ability to deliver an integrated retrofit strategy through technical design, feasibility planning and coordinated delivery. The outcomes support improved comfort, reduced carbon emissions and enhanced building performance.
Wray Vicarage contributes directly to the Diocese of Blackburn’s wider net zero commitments and forms a practical example of how Church estate housing stock can be futureproofed.
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