From Oil to Air Source Heat Pump in Piddletrenthide, Dorchester: Imogen’s Story
How Imogen transitioned from an expensive oil boiler to a self sufficient renewable setup with a Mitsubishi Ecodan, Solar PV, Battery Storage and £7,500 off the cost
Piddletenthide Dorchester
4-Bedroom Detached House (Built 1976–1995)
Estimated Annual Savings: £2,095
Project Overview
Imogen was living in a spacious 4-bedroom detached home, relying on an increasingly expensive and carbon-heavy oil heating system. Eager to break away from volatile oil prices and transition to a cleaner, future-proof alternative, she looked for a solution that would deliver substantial running cost reductions from day one.
She also wanted to take full advantage of the £7,500 Boiler Upgrade Scheme grant and required an experienced team capable of managing the complex integration of a high-capacity heat pump, a bespoke solar array and advanced home battery storage.
We designed, supplied and installed a complete multi-technology renewable energy package. This was built around a high-performance Mitsubishi Ecodan 12kW air source heat pump paired with a 250-litre hot water cylinder to ensure abundant, reliable hot water for the 4-bedroom home. To maximise her self-sufficiency, we complemented the heating system with a 5kW solar PV system and 11.5kW of battery storage.
The results are incredible. By ditching fossil fuels, Imogen is projected to save £1,132 per year on her heating costs alone. Furthermore, by utilising her solar and battery setup to avoid peak electricity rates, she is estimated to save an additional £963 generating her own power bringing her total estimated annual savings to £2,095.
Ann's Testimonial
“From first contact to meeting Shaun for the assessment and quote, to finalising completion, the team at EcoFueled have been amazing. We moved from an oil system to an ASHP with solar and battery. The team in the office were always available to chat through ideas and the team were accommodating to some specifics we had. Everyone involved was knowledgable and those on site also worked relentlessly to get the whole system completed on schedule. The system is running beautifully and our outgoing energy costs are slashed! Huge thanks to the team – would 100% recommend!” Imogen, Piddletrenthide, Dorchester
The Solution
Assessment
Moving away from an oil boiler in a home built between 1976 and 1995 requires careful planning. We carried out a comprehensive room-by-room heat loss assessment to ensure the property's existing fabric could perfectly support a low-temperature system. Our technical team sized the system to guarantee absolute comfort even during the coldest winter months, creating a design where the heat pump, solar PV, and battery storage talk to each other seamlessly for maximum efficiency.
System Design
A synchronised renewable system featuring a Mitsubishi Ecodan 12kW heat pump and a 250L cylinder, integrated with a 5kW solar array and an 11.5kW battery storage system to allow smart charging on cheap overnight tariffs.
Mitsubishi Ecodan 12kW heat pump supplied and installed
Minimal disruption for residents
250-litre hot water cylinder fitted for optimal multi-bathroom delivery
Full system commissioning completed on schedule by our on-site team
Key Benefits Achieved
- Complete Oil Independence: Permanently removed the old oil tank and boiler, replacing them with clean, zero-emission heating.
- Massive Combined Savings: Over £2,000 in estimated total annual utility savings across heating and electricity.
- Smart Tariff Optimisation: The 11.5kW battery automatically stores cheap overnight electricity and free daytime solar power, discharging it during expensive peak hours.
- Abundant Hot Water: The 250L hot water cylinder comfortably fulfils the high-demand needs of a busy 4-bedroom household.
- Upfront Cost Reduction: The £7,500 Boiler Upgrade Scheme grant was fully secured and managed by EcoFueled, significantly lowering the initial investment.
Environmental Impact
Ditching Oil for Good
Replacing an oil heating system is one of the single most impactful changes a homeowner can make to reduce their carbon footprint, eliminating local carbon emissions entirely.
Slashed Energy Outgoings
By pairing a 5kW solar system with a substantial 11.5kW battery capacity, Imogen generates her own clean power and buffers her home against peak grid prices.
Still relying on expensive oil or gas to heat your home?
Imogen's project proves that you can break free from fossil fuels, slash your energy outgoings, and achieve true energy independence by combining a heat pump with solar and battery storage. If you’re ready to see how much you could save, our specialist team is here to design the perfect system for your home.
