Products

Shoebox NX

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.

  • Ideal for flats, apartments, 2-5 bed properties.

  • 5kW Models

  • Could be eligible for 0% VAT on domestic purchases and additional funding off installation costs.*

Performance

Extraordinary performance

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. It can be tucked away in a kitchen or airing cupboard, and its pared-back footprint frees up vital storage space in a home.
Low carbon

Unlock low-carbon heating at scale

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.
Compact

Small but mighty

A compact powerhouse, that can be fitted into small spaces. Makes this the perfect solution for new-build and social housing.
Performance

Extraordinary performance

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. It can be tucked away in a kitchen or airing cupboard, and its pared-back footprint frees up vital storage space in a home.
Low carbon

Unlock low-carbon heating at scale

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.
Compact

Small but mighty

A compact powerhouse, that can be fitted into small spaces. Makes this the perfect solution for new-build and social housing.

  • Hot water, heating & cooling

    Keeping homes cosy and warm in winter, then cool and comfortable in summer.

  • Easy to install & low maintenance

    Connect & Notify approval ensures easy electrical connection, with a 25+ year life expectancy and minimal maintenance.

  • Cost efficient

    Low cost for tenants, homeowners and housebuilders.
Installation

The Shoebox NX is Connect & Notify-approved on the Energy Network Association’s (ENA) heat pump database, saving consumers time and money.

Option 1

Slinkies

Buried in trenches at depths of 1.2m, slinky pipes (also known as slinkies) and straight pipes are a common form of ground array.
Option 2

Borehole

Ground source heat pump boreholes are vertical ground arrays or collectors used to extract heat energy from rock to a ground source heat pump.
Option 3

Pond Mats

Kensa pond mats are specifically designed to ease installation while maximising the energy absorbed from the water.
Models & Costs

Shoebox NX Heat Pump Costs

The Shoebox NX is a game-changing ground source heat pump that will kickstart the biggest transformation in home heating since the conversion to gas 50 years ago.
Single Phase
5kW
from £6,495

Zero Rated VAT

You could be eligible for a 0% VAT rate for domestic purchases of heat pumps. 0% VAT is available to homeowners until 31st March 2027.
Case studies

What our customers say...

Technical

Shoebox NX Technical Specifications

Dimensions
WarrantiesCore heat pump unit (refrigeration components) 5 years Controller & water pumps 2 years
Downloads

Technical Downloads

  • Manual

Shoebox NX Installer Manual

13.66mb
  • Owner Document

UK Declaration of Conformity Shoebox NX

0.43mb
  • Information Sheet

Shoebox NX TIS

0.36mb
  • Manual

Shoebox NX Operation Manual (End-user)

10.62mb
Specs

Phase

Single

Shoebox NX technical data

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 COP figure quoted is calculated as per EN14511. ** In-built immersion heaters will increase running costs and CO2 emissions as they use direct electricity; because of this Kensa heat pumps do not include them. *** By increasing the flow temperature from the heat pump, the unit’s efficiency will drop, and the COP will decrease. ****Kensa Shoebox heat pumps incorporate smart starts as standard to limit the starting current of the compressors. For full details on how the starting currents are calculated, please contact Kensa. *****The SCOP figure quoted is calculated as per EN14825. Note: Design flow rates are for a ground temperature of 0°C and –4°C and a load temperature of 30°C and 35°C.