Keeping homes cosy and warm in winter, then cool and comfortable in summer.
An impressive A+++ efficiency means economical homes and more cost savings.
A premium product with a sleek, stylish aesthetic. Less is more with the Shoebox NX.
Designed for quiet operation, the NX makes less noise than some boilers.
A compact powerhouse that matches the performance of larger heat pumps.
Suitable for various properties, with a 25+ year life expectancy and minimal maintenance.
Harnessing renewable heat, the NX comes without the risks and servicing of fossil fuel systems.
Connect & Notify approval ensures easy electrical connection and minimises installation delays.
With a COP of 4.36 – one of the highest on the market for a small heat pump – and an Energy Rated Performance (ErP) of A+++, the Shoebox NX is incredibly efficient and, therefore, cheap to run. Co-efficient of Performance (COP) benchmarks heat pump quality and efficiency.
The heat pump harnesses naturally occurring renewable energy and concentrates this into a high temperature to provide heating and hot water to a dwelling. For every 1kW of electricity used to run the heat pump, over 4kW of heat is produced – making the Shoebox NX over 400% efficient.
It delivers hot water up to 64℃ and can even be configured to provide passive cooling in the summer months, a valuable feature for combatting overheating, particularly in high-rise buildings. The Shoebox NX is a compact powerhouse with a modern and stylish design, making it a premium product. It can be tucked away in a kitchen or airing cupboard, and its pared-back footprint frees up vital storage space in a home.
Tamsin Lishman, CEO, Kensa Group
The Shoebox NX is engineered to ensure housebuilders exceed compliance requirements, including the Future Homes Standard. This easy-to-install, low-maintenance technology enhances the saleability of properties, preparing developments for a low-carbon future.
Perfect for social housing retrofits, the Shoebox helps tower blocks and flats achieve carbon reduction targets and compliance by improving efficiencies and emissions. This is crucial to tackling the fuel poverty crisis that 6.5 million UK homes are estimated to be struggling with.
Suitable for new builds and retrofits, the Shoebox NX will turbocharge the widescale adoption of ground source heat pumps in the UK with its compact dimensions and exceptional efficiency. The product is perfectly compatible with Networked Heat Pumps, the 21st-century gas grid alternative that could reduce the UK’s gas usage by 70% (£25bn per year).
Networked Heat Pumps encompass two or more ground source heat pumps and a distribution system, creating a balanced heating and cooling solution for multiple properties, entire communities and beyond. A heat pump in each property connected to shared renewable infrastructure allows individual households autonomy over their heating bills.
Networked Heat Pumps are the best type of low-carbon heating because they are highly efficient, flexible, scalable and sustainable. They are ideally suited for large-scale installations, including terraced streets, tower blocks, and new build developments – comprising over 60% of UK housing.
Tamsin Lishman - CEO, Kensa Group
An environmentally-conscious logistics solution with less single-use plastics and more recycled packaging, the super small dimensions of the NX reduce its storage and transportation needs, making it Kensa’s greenest heat pump!
Smaller, sleeker, smarter, and more sustainable than ever, the Shoebox NX extends the frontiers of heat pump technology. It is a British-manufactured product supporting the UK’s growing green economy.
The Shoebox NX is Connect & Notify-approved on the Energy Network Association’s (ENA) heat pump database, saving consumers time and money. In most circumstances, approval also protects householders and housing associations from paying for an electricity upgrade.
For individual installations, approval almost always means installations can go ahead immediately; local District Network Operators (DNO) don’t have to be notified until after the installation. This avoids delay versus non-approved heat pump installations.
See more technical featuresInstalling the Shoebox NX couldn’t be easier with Kensa – simply choose from our range of services to suit you.
• Find a Kensa-approved installer to fit the Shoebox heat pump for you.
• Installers can use our MCS Umbrella scheme for an MCS-accredited installation below 45 kW.
• Large-scale installations can get support with anything from project management to tenant liaison from our delivery partner, Kensa Contracting.
Shoebox NX owners and installers can access Kensa’s technical support for the system’s lifetime. This includes anything from design and commissioning guidance to post-installation advice.
See how we support youHot water temperatures up to 65°C at the point of use.
Temperature setpoints, one for heating and one for domestic hot water, produce the required heat at the highest efficiency – without costly direct immersion heaters.
Weather compensation is fitted as standard to adjust the heat pump’s temperatures depending on the weather.
A fixed-speed compressor compresses the ground’s low-grade heat and delivers real-time efficiencies, reliability and long product life.
In-built water pump for the ground side of the Shoebox unit.
22mm valved connections on top of the heat pump with internal flexible pipes.
All Shoebox NX units come with integrated non-return valves as standard.
Designed to be installed inside the home, typically a kitchen or airing cupboard.
Core heat pump unit (refrigeration components)
Controller & water pumps
5 years
2 years
Connect & Notify approval from the Energy Networks Association (ENA) can save time and money.
Certified by the Microgeneration Certification Scheme (MCS), ensuring compliance and supporting the application for funding streams.
A+++ Energy-related Product (ErP) rating.
Manufactured in an ISO9001 accredited facility.
Winner at the Unlock Net Zero Awards 2024.
627 mm high
554 mm wide
570 mm deep
| Phase | Single |
|---|---|
| Nominal thermal kW rating | 5.8 |
| Part Number | S5-P0K |
| MCS Approved | BBA 0055/45 |
| Performance data - rated heating output at B0/W35 BS EN14511 | |
| Power consumption (kW) | 1.35 |
| Co-efficient of Performance (COP)* | 4.36 |
| Immersion heater output | Kensa heat pumps do not feature back-up electric immersion heaters** |
| ENA Connect & Notify approval | Yes |
| Brine (primary) based on 0°C in / -4°C out |
|
| Design flow rate l/min | 16.3 |
| Pressure drop (kPa) at design flow rate | 20 |
| Max inlet temperature °C | 25 |
| Min temperature °C (outlet) | -5 (at standard settings) |
| Heating water (secondary) based on 30°C in / 35°C out | |
| Design flow rate (l/min) | 17.0 |
| Pressure drop (kPa) at design flow rate | 10.2 |
| Max flow temperature °C*** | 64 |
| Electrical values at B0/W35 | |
| Rated voltage (V) | 220-240 v / 50 Hz |
| Power supply rating (amps) | 16 |
| Rated current (max) amps | 11.6 |
| Typical running current at B0/W35 (amps) | 6.6 |
| Starting current (amps)**** | 12.2 |
| Refrigerant circuit | |
| Process medium | R407C |
| Fill volume kg | 1.1 |
| Compressor type | Scroll |
| Dimensions | |
| H X W X L (mm) | 627 (H) X 554 (W) X 570 (D) |
| Dry weight kg | 93 |
| Operating pressure | |
| Brine circuit min (primary) bar g | Configured at commissioning |
| Heating water circuit min (secondary) bar g | Configured at commissioning |
| Low pressure reset bar g | Configured at commissioning |
| Connection sizes | |
| Primary IN and OUT | 3/4" BSP Parallel with 22mm |
| Heating flow and return | 3/4" BSP Parallel with 22mm |
| Performance (based on Average Climate) at 35°C |
|
| ErP rating | A+++ |
| SCOP***** | 4.60 |
| Seasonal space heating energy efficiency | 176% |
| Performance (based on Average Climate) at 55°C |
|
| ErP rating | A++ |
| SCOP***** | 3.65 |
| Seasonal space heating energy efficiency | 138% |
| Sound Power Level | |
| Sound Power Level (dB) | 51.2dBA |
“The support team at Kensa have made recovery and service into an art form.”
“First class product and excellent after sales attention – even when out of guarantee”
