Our Projects

Sustainable Retrofit in Progress: Solar, Battery Storage, and OCHSNER Heat Pumps At The Big Heat Pump Company, we’re excited to be working on a cutting-edge retrofit project that combines renewable energy and high-efficiency heating. As part of this complete retrofit, we are installing solar panels, battery storage, and OCHSNER heat pumps—creating a fully integrated, low-carbon energy system. This approach not only reduces energy bills but also significantly lowers the building’s carbon footprint. By combining solar generation with battery storage, the system maximises self-consumption, while the OCHSNER heat pumps provide reliable, efficient heating year-round. The project is a great example of how modern technologies can work together seamlessly to create sustainable, future-ready buildings. We look forward to sharing the finished results soon!

At The Big Heat Pump Company, we’re always looking for smarter, faster, and more efficient ways to deliver heating solutions—and our latest project for a London educational setting is a perfect example. Once the plant room was ready, our logistics team transported it directly to the school. The installation process was straightforward: the container arrived, was positioned on-site, and connected to the school’s existing systems. From start to finish, the school had a fully functional plant room with minimal disruption to their day-to-day operations. Looking Ahead This project demonstrates the future of plant room construction: modular, off-site, and ready to deploy. Schools, universities, and commercial clients can benefit from faster installation, higher quality, and reduced operational disruption—all while getting a fully bespoke heating solution. At The Big Heat Pump Company, we’re proud to deliver innovative solutions that combine efficiency, sustainability, and practicality. Whether it’s a small school or a large university campus, our containerised plant rooms make high-performance heating systems simpler than ever.

Cambridge Retrofit Complete: A Smart New Plant Room for an OCHSNER Air Hawk 208 We’ve recently completed another successful domestic retrofit—this time in Cambridge—where The Big Heat Pump Company has installed a new internal plant room to support an OCHSNER Air Hawk 208 heat pump. The project focused on upgrading the home’s heating system to a modern, efficient and future-ready solution while making best use of the existing space inside the property. Our team designed a bespoke plant-room layout to house the core system components neatly and accessibly, ensuring long-term reliability and ease of maintenance. From buffer vessels and hot-water cylinders to pumps, controls and distribution pipework, every element was installed with precision and care. The finished plant room is compact, tidy and well-organised—reflecting the high standards we apply to every domestic project, whether it’s a full system replacement or part of a wider refurbishment. The OCHSNER Air Hawk 208 was selected for its strong performance, quiet operation and ability to deliver consistent comfort even in colder conditions. Once commissioned, the system was carefully balanced and optimised to suit the property’s heat demand, giving the homeowner efficient, low-carbon heating and dependable hot water. Projects like this highlight how thoughtful design and quality installation make all the difference in retrofit settings. If you’re considering upgrading your home’s heating in England & Wales, The Big Heat Pump Company is proud to deliver expertly engineered solutions from start to finish.

Bespoke Plant Rooms, Delivered: Modular Energy Centres for Commercial Properties At The Big Heat Pump Company, we’re increasingly delivering bespoke, prefabricated plant rooms designed to make commercial decarbonisation faster, cleaner and more efficient. For many sites, whether urban rooftops, industrial yards, farms or estate developments, traditional plant-room construction can be disruptive, time-consuming and weather-dependent. Our solution is to design and build containerised energy centres off site, fully fitted with heat pumps, battery storage and associated controls, then deliver them ready to connect. Each modular plant room is engineered specifically for the project. We size the heat pump systems to match building loads, integrate battery storage to support peak demand and tariff optimisation, and include all necessary hydraulic equipment, electrical infrastructure, safety systems and monitoring. Once delivered to site—whether at ground level, craned onto a rooftop or positioned within a farmyard—the unit can be rapidly connected, commissioned and brought into service. Prefabrication offers major advantages for commercial clients. Factory-built environments allow for higher quality control, safer working conditions and precise installation of equipment and pipework. On site, disruption is reduced, programmes are shortened and weather delays are minimised—particularly valuable for operational buildings that need to stay open during works. These modular systems also offer exceptionally efficient performance. By designing the entire energy centre as a single integrated package, we can optimise hydraulic layouts, controls and storage strategies from day one—delivering reliable, low-carbon heating with lower running costs and long-term resilience. From logistics depots and agricultural estates to offices, schools and mixed-use developments, our containerised plant rooms are helping organisations transition to clean heat quickly and confidently. If you’re exploring commercial heat pumps or on-site energy storage, The Big Heat Pump Company can deliver a complete, bespoke solution—built off site and delivered ready to perform.

Fareham Retrofit Complete: Twin OCHSNER Air Hawk 18s Now Keeping This Home Warm and Cosy Another successful project completed—this time in Fareham, where The Big Heat Pump Company has finished a domestic retrofit featuring two OCHSNER Air Hawk 18 heat pumps. The brief was to upgrade the home’s heating system to a modern, low-carbon solution while ensuring excellent comfort levels throughout the property. After a detailed survey and system design, our engineers installed a twin-unit configuration to meet the home’s heat demand efficiently and provide reliable year-round performance. Alongside the heat pump installation, our team carried out additional plumbing works to integrate the new system seamlessly with the existing distribution network. Pipework upgrades, hydraulic modifications and careful commissioning ensured the whole system operates smoothly, efficiently and ready for long-term use. The results speak volumes—the homeowner is now enjoying a property that is warm, cosy and consistently comfortable, with quieter operation and improved energy efficiency compared to the previous heating system. Projects like this highlight the value of thoughtful retrofit design and high-quality workmanship. Whether it’s a full system replacement or a more complex upgrade requiring supporting works, The Big Heat Pump Company is proud to deliver complete solutions from start to finish. If you’re considering upgrading your home’s heating, our team is always happy to help explore the options.

New-Build in Tunbridge Wells Taking Shape with an OCHSNER Air Hawk 208 Work is progressing well on an exciting new-build project in Tunbridge Wells, where The Big Heat Pump Company is delivering a high-performance low-carbon heating system centred around an OCHSNER Air Hawk 208 heat pump. This carefully designed home has been planned from the outset with efficiency and sustainability in mind, making it the perfect candidate for advanced heat-pump technology. Our team has completed the main installation works, including positioning the external unit, internal plant-room equipment and primary pipework runs, all installed with our usual focus on neatness, durability and long-term performance. The Air Hawk 208 has been selected to provide reliable heating and hot water while operating at impressively low sound levels—ideal for a modern residential setting. As the build continues, final connections, commissioning and system optimisation will ensure the property achieves excellent comfort and energy efficiency from day one. It’s always rewarding to see projects like this coming together, particularly when renewable technology is embedded into a home from the ground up. 📸 More photos to follow once everything is complete—watch this space for the finished system and final plant-room shots. If you’re planning a new build or major renovation and want to future-proof your heating, The Big Heat Pump Company would be delighted to help.

Two OCHSNER Air Hawk 208s Power a London Townhouse Retrofit. We’re delighted to share the successful completion of a premium renewable-heating upgrade in a London townhouse, where The Big Heat Pump Company has delivered a full end-to-end installation of two OCHSNER Air Hawk 208 heat pumps.From the initial survey and system design through to installation, commissioning and client handover, the entire project was managed by our in-house engineering team. The brief was clear: replace the existing heating system with a future-proof, low-carbon solution that could meet the home’s heat demand without compromising on comfort, aesthetics or noise levels.Working closely with the property owner, our designers specified a twin-unit OCHSNER Air Hawk configuration to provide resilience, high output and excellent seasonal efficiency. The compact external units were carefully positioned to suit the townhouse setting, while new internal plant-room equipment and controls were installed neatly and discreetly.The result speaks for itself. The system is now fully operational, delivering consistent warmth and hot water throughout the property—and doing so with remarkably low sound levels. Even in a dense urban environment, the Air Hawk units run so quietly they are barely noticeable, a testament to both OCHSNER’s engineering and the care taken during installation.Our client praised the exceptional workmanship throughout the project, from the tidy pipework and smart plant-room layout to the smooth commissioning process and detailed handover.Projects like this highlight what we do best: pairing leading-edge heat pump technology with meticulous design, installation and aftercare. Whether it’s a London townhouse, a listed property or a large commercial building, The Big Heat Pump Company is proud to deliver reliable, high-performance low-carbon heating—start to finish.

The Big Heat Pump Company has just installed two OCHSNER Air Hawk 208 air source heat pumps as part of a fantastic renovation project in Norfolk, perfectly timed to deliver a warm and cosy Christmas for the homeowners. The powerful and ultra-efficient Air Hawk 208 units provide exceptional heating / cooling and hot water performance, making them ideal for large or complex properties undergoing modern upgrades. Quiet, reliable, and engineered for long-term efficiency, these systems are already transforming the home’s comfort levels. They’re neatly positioned within the evolving garden design, and we can’t wait to see the finished photos once the landscaping work is complete.

The Big Heat Pump Company recently completed the installation of an OCHSNER Air Hawk 208 at a beautiful home in Cambridge, providing the property with exceptional year-round heating and hot water efficiency. The Air Hawk 208 is known for its quiet operation, premium engineering, and outstanding performance even in challenging outdoor temperatures—making it an ideal choice for modern homes looking to lower their carbon footprint without compromising comfort. The installation sits neatly within the garden space, and we can’t wait to see the final photographs once the landscaping is complete. This project is another great example of how high-quality renewable technology can integrate seamlessly into any home.

The Big Heat Pump Company recently completed a flagship installation featuring two OCHSNER 1850 air source heat pumps in a traditional London townhouse—a property where discreet, efficient, and reliable heating is essential. These award winning air source heat pumps are the perfect fit. The homeowner sought a future-proof heating solution that could deliver high performance with out compromising the character of this period home. Space was limited, noise restrictions were tight, and year-round comfort was a must.‍

We are thrilled to share some fantastic news! The Big Heat Pump Company, together with an outstanding team of architects, installers, and builders, has been awarded a regional prize in the LABC Building Excellence Awards 2025 for East Anglia.

In the heart of Somerset, nestled on a bustling residential street, a homeowner faced the challenge of incorporating an efficient heating solution into their full property renovation. With houses closely packed together and limited space for outdoor units, the selection of the right air source heat pump was crucial. The Ochsner Air Hawk 208 emerged as the ideal choice, seamlessly aligning with the homeowner’s vision for modern comfort and efficiency. When they found out it was the quietest heat pump in the world it wasn't an option to go with anything else. this 'Quieter Than A Whisper Machine' was the only option. At 28 db at three meters from the evaporator is whisper quiet. The installation of the Ochsner Air Hawk 208 was a pivotal part of the property's transformation. Known for its advanced technology and sleek design, this heat pump offered a perfect blend of style and functionality. The unit's compact external evaporator was expertly installed in the restricted space available, demonstrating its suitability for urban settings where every inch counts.

The owners displayed remarkable open-mindedness and flexibility when it came to adjusting the hot water and heating systems, showcasing their willingness to embrace innovative solutions. They meticulously researched and ultimately chose the OCHSNER heat pump for its unparalleled ability to switch effortlessly between heating the pool and the house throughout the year. This decision was heavily influenced by OCHSNER's esteemed reputation for longevity and reliability, making it the ideal choice for sustaining comfort and efficiency in their cherished home. By opting for this sophisticated technology, the owners demonstrated their commitment to modernity while preserving the timeless beauty of their historic property.Working with historic and listed buildings presents unique challenges, as planning regulations rightly demand minimal aesthetic and structural impact. The AIR 18 is perfectly designed for these scenarios.The split system design leads to a notably lighter and more visually appealing outdoor unit since it does not contain the bulky compressor. This not only lessens the structural burden on historic roofs or walls but also offers more discreet and flexible installation options. In fact, these units can be positioned up to 16 meters away from the building.Installers approved by OCHSNER must meet the highest standards. They only endorse installers who will care for these remarkable machines, ensuring that complex tasks appear effortless. Their exceptional workmanship is what enables these seemingly challenging installations to succeed. The Big Heat Pump Company will across England & Wales for installation and continued maintenance of all our systems.

Nestled deep in the rolling hills of the Cotswolds, a beautifully restored old mill house has just stepped into the future of home comfort. The Big Heat Pump Company recently installed the OCHSNER Air hawk 726 , bringing whisper-quiet, high-efficiency heating and hot water to this historic property. Carefully integrated to respect the building’s heritage, the Air Hawk 726 delivers powerful performance without compromising the charm or tranquillity of the rural setting. Its record-breaking low noise levels make it ideal for countryside living, while its ability to achieve high flow temperatures ensures year-round comfort and abundant hot water — even through the chilliest Cotswolds winters. This installation proves that even centuries-old homes can embrace cutting-edge renewable technology, reducing energy bills and carbon footprints while preserving character. It’s a perfect marriage of tradition and innovation — and a shining example of how OCHSNER technology can work seamlessly in heritage settings.

This Kensington townhouse project showcases the perfect harmony between high-end living and renewable technology. The OCHSNER Air Hawk 1850 not only meets the technical demands of an energy-conscious homeowner but also satisfies the aesthetic and acoustic requirements of London’s most exclusive neighbourhoods. With its unmatched noise reduction and ultra-efficient performance, the Air Hawk 1850 proves that sustainable heating can be as refined as the homes it serves. These Austrian engineered air source heat pumps give the home owners peace of mind for 25 years or more. The exceptional build quality set them apart from the other competitors on the market. For homes that deserve the highest standards, OCHSNER is the only option. The Big Heat Pump Company team always ensure the site is left clean and tidy with exceptional installation standards that match these incredible heat pumps.

In the heart of Central London, The Big Heat Pump Company successfully installed two Air Hawk evaporators on a rooftop, demonstrating the versatility and performance of our systems in dense urban environments. Thanks to the Air Hawk’s exceptionally quiet operation, this installation meets strict city noise regulations, making it an ideal solution for metropolitan buildings where space and sound constraints are critical.

As part of a full restoration of a beautiful London townhouse, The Big Heat Pump Company delivered a flawless installation of stylish new radiators that perfectly complement the fresh interior design. Blending form and function, the radiators not only provide efficient heating but also enhance each room with their sleek, modern look. The team’s expert workmanship is evident throughout, with clean pipework and thoughtful placement that harmonises effortlessly with the home's aesthetic. Alongside the radiators, The Big Heat Pump Company also installed an air source heat pump, bringing sustainable, low-carbon heating to this elegant period property.

Cambridge House – A Complete Renewable Revamp Cambridge House underwent a full renewable energy overhaul, featuring the OCHSNER Air 18 heat pump, known for its super-quiet operation and exceptional efficiency. Perfectly suited for this energy-conscious homeowner with discerning taste, the OCHSNER system was an ideal choice. The project also included advanced features like cork insulation and Tesla battery storage, ensuring the home is well-equipped to handle future energy price increases and changing climate conditions. This forward-thinking upgrade provides both comfort and long-term sustainability.

We design and build containerised plant rooms in any size, colour or cladding options. These are perfect for commercial use. In this example two containerised plant rooms are being used as plant rooms that house the OCHSNER heat pumps and the external fan units are placed on a single gantry on top. The external space was previously unused and this solution meant that all the new refurbishment work could be done outside and not disturb the leisure centre day to day operation, nor did they have to find the space in the existing undersized plant room

St Peter Mancroft Church in Norwich city centre has dramatically reduced its carbon footprint and energy use by replacing its entire interior lighting system, installing OCHSNER heat pumps as well as batteries and solar panels. Through this work, the church expects to see an 84% reduction in emissions by saving 60 tonnes of CO2 each year.​ St Peter Mancroft is now recognised by The Church of England as a Demonstrator Church as an example for all churches striving to meet the CofE's Net Zero 2030 ambition

We helped decarbonise St Josephs School by replacing the old failing gas boiler with a new energy efficient OCHSNER Air 41 heat pump. Helping them reduce their bills at the same time. The school already had a large Solar PV array and voltage optimiser installed that complemented the changeover to a heat pump heat solution

Hard to heat farmhouse in Wales becomes warm and cosy with an OCHSNER Air Hawk 518 heat pump. When sitting in their conservatory or out on their patio, the clients can't hear the outdoor fan unit at all, the sounds of nature surrounding the house are all louder

A Georgian farmhouse with lots of original features including single pane sash windows and open fires. This is a classic hard to heat building in the UK. Two OCHSNER air source heat pumps provide all the heating and hot water requirements with the existing oil kept as a backup. This was done with the existing plumbing and radiators. The current inhabitants have never been warmer and can't believe how long they lived in the cold before they changed over to OCHSNER heat pumps.

A full property refurbishment in London with large basement conversion, the OCHSNER air source heat pump provides all the space heating and hot water to the UFH throughout the dwelling. The new solar panels, battery storage and electric car charger brought the whole system together so the customer can future proof their energy bills as well as dramatically reducing their CO2 emissions. Even in central london with precious garden space and close proximity neighbours, the sound levels are so low that the evaporator easily passed planning restrictions and the external fan unit a feature of the garden