From Oil-Heated & Inefficient to Low-Carbon, Future-Ready Living
Homeowner: Joshua Mack
Location: West Lutton, North Yorkshire
Property Type: 1940s semi-detached, 3-bedroom home
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Joshua’s parents home relied on heating oil and suffered from high energy costs, poor thermal performance and a low EPC rating. Rising and unpredictable oil prices made bills difficult to manage, while the property struggled to retain heat, resulting in an uncomfortable living environment, particularly during colder months.
Key challenges included:
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High annual energy bills
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Unpredictable heating oil costs
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Cold rooms and inconsistent heating
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Poor EPC rating (low E)
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​Broad Oak Group delivered a whole-house retrofit designed to dramatically improve energy efficiency, comfort and long-term running costs, while future-proofing the home.
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Works carried out included:
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Room-in-roof insulation to the staircase and rear bedroom
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Mitsubishi air source heat pump with OpenEnergy monitoring
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New pipework and radiators throughout the property
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Mixergy X 180L hot water cylinder with smart integration and solar PV compatibility
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6.97kW solar PV system
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Solis 10kW hybrid inverter
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24kW Puredrive battery storage system with emergency power supply
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Enviovent heated Positive Input Ventilation (PIV) system with control panel
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Aico Home Life Safety System, including Ei1000G gateway, environmental monitoring and resident app for occupier
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Installation of 3-phase meter box and new distribution boards with earthing
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Full electrical works
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Loft and cavity wall insulation
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22kW Zappi fast EV charger
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The impact of the retrofit has been transformative.
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EPC rating improved from a low E to a high B
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Annual energy costs reduced from over £3,000 to under £500
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Consistent, steady heat throughout the home
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Significantly improved comfort and warmth
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Reduced reliance on fossil fuels and lower carbon emissions
“Excellent communication with the installation manager and team. They were tidy, efficient and professional throughout. Broad Oak Group also worked with me to become an approved contractor with our housing association, which made a huge difference.”