Winchester has replaced 35 gas boilers with OCHSNER low energy air source heat pumps. A large project with 36 Air 41 units being installed to date.

The largest church in Norwich, after its two cathedrals, Grade 1 listed and a challenging project. Using two Air 41 heat pumps its now set for decades of reliable heating.

Trinity College, Cambridge, is a venerable institution, founded by Henry VIII in 1546, with an estate that encompasses a range of Grade I-listed heritage assets across the city and now hosts an OCHSNER 1850.

The Sekforde opened as a public house in 1829. The Sekforde: A Grade II Listed Pub and Cultural Hub Harnessing OCHSNER Heat Pumps for Heating, Hot Water, and Cooling—Cutting Fuel Bills to Just 15% of Comparable Fossil-Fuelled Buildings!

OCHSNER containerised plant rooms provide a flexible, low-disruption solution for commercial heating and cooling. Built off-site and craned into position, they can be tailored to any size, cladding, or plumbing requirement, with the ability to cascade multiple heat pumps for projects of any scale. Offering exceptional efficiency, reliability, and a lifespan of up to 40 years, these systems deliver substantial year-on-year savings while reducing carbon emissions. Already trusted by institutions such as Cambridge University, Winchester University, and Todmorden Leisure Centre, containerised OCHSNER solutions are a future-proof investment for organisations looking to cut costs and embrace sustainable technology.

Containerised Plant Rooms with OCHSNER Air 41 Cascades – Todmorden Leisure Centre Todmorden Leisure Centre has taken a bold step towards sustainability by replacing its ageing oil-fired heating system with a state-of-the-art OCHSNER Air 41 air source heat pump cascade system. Featuring two bespoke containerised plant rooms.

Grade II listed Residential Property in the Cotswolds - Soon to be holiday accomadation and educational center for the working water wheel.

Powering Growth Sustainably: Lessons from IKEA’s OCHSNER Heat Pump Installation

This Kensington townhouse, located in a sensitive conservation area, presented a classic challenge: how to provide modern, efficient heating without compromising the property’s historic character. The solution? An OCHSNER Air Hawk 1850, part of our award-winning heat pump range renowned for exceptionally low noise levels and high-efficiency performance, ideal for the most difficult-to-heat buildings.

This awatrd winning project using OCHSNER heat pump technology to provide this district hospital in SCHWAZ shows just how the NHS and other trusts can safe guard their futures with our sustainable aproach

The Erasmus Building, a busy halls of residence, has made a major step toward sustainability by moving away from its gas-fired boilers and adopting an innovative air source heat pump solution. The project saw the installation of a cascade of three OCHSNER Air Hawk 726 units, delivering a complete system for heating, cooling, and domestic hot water for the students living below.

This landmark renovation and extension project transformed a residential property in Cambridgeshire into a high performance, low-carbon home. Working in collaboration, the architect, contractor and renewables team delivered a building that combines refined design with sustainability. Wärmetek supplied and supported the installation of an OCHSNER air-source heat pump system (via The Big Heat Pump Company) as a key element of the building services upgrade.

At a beautiful Grade II listed property on the Isle of Wight. An OCHSNER Air 18 provides heating and hot water during the winter months and heats the swimming pool during the summer months.

The 310 Air featuring an OCHSNER heat pump is a groundbreaking heat pump designed for apartments, passive houses, and eco-developments. With no external unit required, it offers a compact, plug-and-play solution that combines OCHSNER’s renowned reliability with a customised tank for easy installation. Ideal for developers, architects, and installers, it provides efficient heating and hot water while solving space and design challenges in modern projects.

A large six bedroom Georgian farmhouse with original windows and open fireplaces. Converted from an oil boiler to two GMLW 14+ air source heat pumps.

For schools, universities, and estates with multiple residential or commercial buildings, the benefits of choosing OCHSNER heat pumps over fossil fuels are immediate and long-lasting. By switching to renewable heating and cooling, these organisations can cut annual energy bills by up to 75%, freeing up vital funds that can be redirected into education, facilities, and growth. Alongside the financial advantages, the reduction in carbon emissions supports sustainability goals and helps institutions lead by example in the transition to net zero.

The Award-Winning OCHSNER Air Hawk 518: Whisper-Quiet, Ultra-Efficient, and Built to Last for Over 20 Years. Austrian Engineering At It's Very Best

When choosing a heating system, it’s easy to focus on the sticker price or the warranty terms. But the real return on investment comes from choosing a system that won’t need replacing — or re-negotiating service contracts — every 10 years. The heat pump in Unterbergla is living proof: a well-built system, correctly installed, can serve generations. Let us introduce you to a true pioneer of sustainable heating: an OCHSNER heat pump installed in 1988, still serving a residential complex in Unterbergla, Groß St. Florian, Austria, more than 35 years later.

Following installation, a noise officer attended site to assess operational sound levels. In an impressive demonstration of the technology, the heat pumps did not even register on the decibel meter compared to the background noise, confirming just how quiet the system is in real-world conditions. Alongside their acoustic performance, the units now provide reliable, low-carbon heating and hot water for the apartments, supporting reduced energy use while maintaining the high standards expected in luxury homes. A Benchmark for Urban Retrofit and New-Build This project at Orme Court is a standout example of how OCHSNER heat pumps can perform even in the most challenging environment, from noise-sensitive city locations to high-end residential schemes demanding uncompromising comfort.

The Big Heat Pump Company designed and installed a cascade system of two OCHSNER Air Hawk 208 heat pumps, delivering exceptional efficiency while operating at ultra-low sound levels. OCHSNER’s reputation for acoustic engineering made the Air Hawk 208 an ideal choice for this sensitive location. To further integrate the system into the setting, the units were enclosed within bespoke lattice screening, helping to soften their appearance and satisfy conservation requirements. (Although we have to admit, these heat pumps look impressive enough even without the cover.)

This Norfolk project perfectly captures what modern premium homes demand: powerful renewable heating delivered with elegance and restraint. With OCHSNER heat pumps at its heart—and Wärmetek’s expertise behind the commissioning—the property now benefits from a system that embodies the quiet luxury every exceptional home deserves.Chosen for their exceptional engineering, efficiency, and acoustic performance, the Air Hawk 1850 units are ideally suited to large, high-end homes with significant heat demand. Their ability to operate quietly, while delivering powerful output, makes them a natural fit for luxury developments where comfort goes hand in hand with discretion.