Key advantages of the Commercial Plant Room

For the highest of heat demands

Boasting three-phase models up to 75kW, the series’ modular units provide flexibility to match and balance the heating demands of commercial buildings.

Ideal for cascaded systems

To efficiently meet fluctuating demands, multiple units can be connected together in a cascaded system.

Smart & compatible

Simple integration with new or existing radiators, fan coils or underfloor heating. Multiple units can also be controlled via a Building Management System (BMS).

Rewarding payback

25 – 45kW models are MCS-approved and eligible for rewarding returns from the government’s Renewable Heat Incentive (RHI).

Modulates to the highest heat demands

The Commercial Plant Room matches heating and hot water demands of up to 60°C. The series is comprised of modular three-phase models that deliver tailored outputs, flexibility and compatibility in large or commercial buildings.

The Plant Room is the perfect candidate for a cascaded system. Efficiently fulfilling fluctuating demands, multiple Plant Rooms can work together to deliver large space heating and hot water demands at the same time.

With multiple heat pumps, heating and hot water can be provided to different parts of a building simultaneously through a Building Management System (BMS).

Designed for ease, the Plant Room is compatible with a building’s heating distribution system, such as fan coils, underfloor and air handling units.

"It made sense to opt for this innovative approach to keeping [our buildings] warm and I am very pleased that the system is proving to be efficient and effective."

James Stockan - Orkney council chairman

Affordable, rewarding & reliable heating

Rewarding RH returns

The MCS-approved models (25 – 45kW) unlock generous, tax-free returns from the RHI. While domestic applications benefit from 7 years of income through the Domestic RHI, commercial buildings are eligible for 20 years of returns from the Non-Domestic RHI.

Alongside the RHI, the Plant Room brings low running costs, lack of annual servicing requirements and minimal maintenance over its 20-year design life.

See costs & payback

Lifetime support

On top of a 5-year guarantee, every Kensa heat pump comes with technical support for life. This includes anything from advice for installers to post-installation guidance for end users.

Powerful yet power-saving

DNO-friendly ‘soft starts’ are fitted as standard to prevent electricity flickers and ensure peak starting load is minimised.

A fixed speed compressor compresses the ground’s low-grade heat and delivers real-time efficiencies, reliability and long product life.

See more technical features

"As well as being energy-efficient, the technology makes perfect business sense compared to air source - which works out more expensive."

Charles - Garden centre owner

Backed by unrivalled support

Kensa’s installation services

Whatever your project, Kensa can help. Our installation services are perfect for projects of all shapes and sizes.

Need an installer?
Submit your plans and we’ll recommend a local Kensa-approved installer.

Need MCS support?
Our MCS Umbrella service will guide installers through the whole process.

Planning a large-scale project?
If your development has multiple buildings or requires specialist support, our award-winning heat pump contractors at Kensa Contracting can help.


Kensa provided us with lots of great advice prior to the installation and everything worked out as planned. The Kensa kit has delivered well, as always, and we continue to use them as our preferred ground source heat pump supplier.

Jamie Burnham - Installer

See more reviews

Looking for costs?

See Plant Room prices & project examples.

Dedicated technical support

The Plant Room comes with Kensa’s technical support for the system’s lifetime. Get guidance from our technical team on anything from commissioning to post-installation.

See how we support you

The Plant Room by the sea

In this project, the Plant Room uses the sea as its heat source to deliver heating and hot water to Orkney council offices.

See Orkney council's case study

Looking for technical specifications?
Discover features & technical data.

Models & Costs

Commercial Plant Room models

Heating only models:

40kW, 45kW, 60kW and 75kW produce temperatures up to 55°C.

Heating & cooling models:

25kW, 30kW, 40kW, 45kW, 60kW and 75kW.

High temperature model:

25kW model produces temperatures up to 60°C.

All 25 – 45kW models have MCS accreditation, making them eligible for the RHI.

Plant Room costs

Heating-only models

40 – 75kW from £13,165 – £17,998

Heating & cooling models

25 – 40kW from £12,789 – £15,754

45 – 75kW from £17,617 – £21,211

High temperature model

25 kW from £13,165


*List prices exclude VAT.

Get a quote with Kensa

The right model for your project will depend on your building’s requirements, such as heat demand and insulation levels.

For a clearer indication of price, get a quote at no obligation.

Get a quote

Project cost example: a commercial building

Type of system3 x 45 kW Plant Room heat pumps in a cascaded system Vs. LPG boiler
Type of ground arraySlinkies (common) 1Pond mats (near water) 2Boreholes (limited land)3
Land area required6,000 sq/m 6,000 sq/m of lake2,000 sq/m-
Appliance & infrastructure costs*£101,000£91,500£224,000£7,000
Non-Domestic RHI income (over 20 years)**£425,000£425,000£425,000Not eligible
Running costs (over 20 years)*** £375,000£375,000£375,000£500,000
Servicing costs (over 20 years)****£0£0£0£2,000
Total net cost (after 20 years)*****£51,000£41,500£174,000£509,000

Looking for a quote?

Submit your plans to get started.


Performance features

‘Soft starts’ fitted to ensure that starting load and flicker is minimised.

A fixed speed compressor upgrades the ground’s low-grade heat energy, optimised for the best efficiency at a fixed output.

The high temperature model delivers heating up to 60°C, which is ideal for commercial buildings with high heat demands.

High specification acoustic hoods to dampen sound and isolate vibrations.

Weather compensation – which efficiently adjusts the temperatures to make up for heat loss on colder days – is fitted as standard.


Plant Room components

Core heat pump unit (refrigeration components)

Controller & water pumps


5 years

2 years


MCS accreditation

Microgeneration certification scheme (MCS) accreditation for 25kW – 45kW models supports qualification for the RHI.

A+ energy efficiency

A+ Energy-related Product (ErP) rating.

ISO9001 approval

Manufactured in an ISO9001 approved factory.


1750mm high

800mm wide

900mm deep

Plant Room series technical data

Nominal thermal kW rating25 HT253040456075
Product Code
X - H Heating Only
R Reverse Cycle
C Cooling only +
MCS ApprovedHeating: BBA0055/34Heating: BBA0055/16
Reverse cycle: BBA0055/24
Heating: BBA0055/17
Reverse cycle: BBA0055/25
Heating: BBA0055/18
Reverse cycle: BBA0055/26
Heating: BBA0055/19
Reverse cycle: BBA0055/27
Performance data - rated heating output at B0/W35 BS EN14511
Power consumption6.446.589.712.815.919
Co-efficient of Performance*
Immersion heater outputKensa Heat Pumps do not feature back-up electric immersion heaters**
Brine (primary): Based on 0°C in / -4°C
Design flow rate kg/min82.468.587.4105.6135.2167.8207.4
Pressure drop kPa at design flow rate12.611.11723.625.221.831.7
Max inlet temperature °C15151515151515
Min temperature °C (outlet)-5 (at standard settings)-5 (at standard settings)-5 (at standard settings)-5 (at standard settings)-5 (at standard settings)-5 (at standard settings)-5 (at standard settings)
Heating water (secondary): Based on 30°C in / 35°C out
Design flow rate l/min12074.795112147.6183.5224.9
Pressure drop kPa at design flow rate7.271312.216.919.51725.5
Max flow temperature °C***Up to 65?C depending on application505050505050
Electrical values at B0/W35
Rated voltage400V / 50Hz
Power supply rating amps40323240506370
Rated current (max) amps32222532415263
Typical running current at B0/W35 amps15.3131418232936
Starting current amps ****54577589101112140
Refrigerant circuit
Process mediumR134aR407CR407CR407CR407CR407CR407C
Fill volume kg32.252.533.753.755.5
Compressor typeScrollScrollScrollScrollScrollScrollScroll
H X W X L (mm)1750 x 800 x 9001750 x 800 x 9001750 x 800 x 9001750 x 800 x 9001750 x 800 x 9001750 x 800 x 9001750 x 800 x 900
Dry weight kg280200250280300350380
Operating pressure
Brine circuit min (primary) bar g0.
Heating water circuit min (secondary) bar g0.
Low pressure reset bar g1.
Connection sizes
Primary IN and OUT PN10/16DN40DN40DN40DN40DN40DN40DN40
Heating flow and return PN10/16DN40DN40DN40DN40DN40DN40DN40
Performance (based on Average Climate) @ 35°C
ErP ratingA+A+A+A+A+N/AN/A
Seasonal space heating energy efficiency148%142%142%145%142%N/AN/A
Performance (based on Average Climate) @ 55°C
ErP ratingA+A+A+A+N/AN/AN/A
Seasonal space heating energy efficiency124%114%117%118%N/AN/AN/A
Sound Power Level
Sound Power Level (dB)6868687171N/AN/A
ᵻ Units are currently being ErP tested and will be available when complete.
^The 45kW Plantroom produces above 50kW at a ground temperature of 0°C and load temperature of 35°C.
+ Cooling only units are not MCS approved.
* The COP figure quoted excludes the water pump electrical input and is calculated according to 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 efficiency of the unit will drop and the COP decreases.
**** The starting currents are per phase. For full details on how the starting currents are calculated please contact Kensa.
*********The SCOP figure quoted is calculated as per EN14825.
Note i): Design flowrates and pressure drops are based on a ground temperature of 0°C and –4°C and a load temperature of 30°C and 35°C.
Note ii): The P500X unit is classed as a Low Temperature Space Heater as per the ErP regulations.

Get the MCS stamp of approval

with Kensa’s MCS Umbrella Service.

Lifetime technical support

“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”


Case study reviews

Commercial Plant Room Ground Source Heat Pump

"Kensa provided us with lots of great advice prior to the installation and everything worked out as planned. The Kensa kit has delivered well, as always, and we continue to use them as our preferred ground source heat pump supplier."

Jamie Burnham - Installer

See the case study

Project overview

New purpose-built outdoor education centre

2 x 30KW Plantrooms providing heating and hot water

10 x pond mats under pontoon in the harbour

£1600 per year running cost

RHI income £7617 est.

Budget £32k

Commercial Plant Room Ground Source Heat Pump

"As the Warehouse Buildings stand close to the sea, it made sense to opt for this innovative approach to keeping them warm and I am very pleased that the system is proving to be efficient and effective."

James Stockan - Council chairman

See the case study

Project overview

Orkney Council offices

2 x 40kW Plant Room heat pumps providing heat and hot water

2 x pond mats submerged beneath the pier in Stromness harbour

£1000 savings compared to oil

Six tonnes of CO² per year

Commercial Plant Room Ground Source Heat Pump

"As well as being energy-efficient, the technology makes perfect business sense compared to radiators or air source - which work out more expensive."

Charles - Garden centre owner

See the case study

Project overview

New-build extension providing 30,000 sq ft of retail space

Cascaded Plantroom system

2x 45kW Plantroom heat pump providing space heating

1x 25kW High Temperature Plantroom providing hot water

24x 50m slinkies located under nearby field

Main building upgraded to underfloor heating

System contains 7250 litres of water and 1450 litres of antifreeze

Kensa Google reviews

Mike Hayes
Mike Hayes
12:25 08 May 20
Well, Kensa technicians continue to do a wonderful job. We installed our heat pump back in 2007. Paid a fair price, got... a grant towards the cost and have benefited from cheaper heating ever since. Any other boiler I am sure would have been on the scrap heap by now and the manufacturers not in the slightest bit interested in us. But not Kensa, they have continued to give first class technical support throughout the thirteen years - all advice free, friendly and helpful. We’ve bought a few bits, but not many and several parts have been provided free of charge. This time it was Todd doing the magic programming a new Corel for us, which he sent us by return at absolutely no cost to us. So anyone reading this - thinking of having a Kensa heat pump - do it! You won’t be sorry. Todd likened it to a land rover - sturdy, robust, efficient and long lasting and I think that’s absolutely right.read more
Steve Taylor
Steve Taylor
14:47 04 May 20
Can't recommend Kensa enough. Great product, phenomenal customer service. I called them after our heat pump stopped... working and spoke to an engineer called Tod. He was extremely knowledgeable and talked me through getting it going again over the telephone, even though turned out that the fault wasn't anything to do with the heat pump itself! Above and beyond, even messaged me again to check everything was still ok. Thanks Tod, you are an asset to Kensa!!read more
Duncan Rae
Duncan Rae
17:11 27 Apr 20
Great company to work with. Very professional in every aspect of their business. The best company to deal with if want... a heat pump system that is designed and installed by highly skilled and experienced people.read more
Jon Tobin
Jon Tobin
20:44 12 Mar 20
The staff at Kensa could not have been more helpful I bought a 10 kw heat pump in 2007 which has worked without a... problem untill while extending my drains I cut through one of the underground pipes. The help I received enabled me to get my system up and running with only a day down time very very helpful.read more
Jean Clarke
Jean Clarke
20:07 03 Mar 20
We found all Kensa personnel helpful and knowledgeable, especially Tom Worth, when our heat exchanger broke down. ... Very pleased we purchased Kensa. Peter Lyonsread more
Robert Evans
Robert Evans
10:39 20 Feb 20
Similar to another reviewer, we bought Ground Source Heat Pump from Kensa some 10 or more years ago. Never had any... problems what so ever, until recently it fails to start and only rarely does it get up and going. Called the service desk, spoke to one of the Tom's, excellent knowledgeable advice culminating in us purchasing a replacement smart start box. I was nervous about doing the replacement, but encouraged by Tom, gave it a shot, it worked perfectly, job done ! A couple of calls to the team always results in friendly expert definitive advice, everything breaks at some point, so its all in the recovery and the support team at Kensa have made recovery and service into an art form. The product is by design inherently more reliable than oil or gas boilers and the Kensa support experience confirms it was the right decision to buy the product. Congratulations.read more
Mark Neal
Mark Neal
20:39 15 Jan 20
Came across the invoice for our Kensa heat pump during a clear out. It cost us about £6k just over ten years ago (+... digger hire for a few days) and I reckon it's saved us at least £750 per year since (probably closer to £1000). Maintenance cost so far has just been inhibitor for the heating system.read more
David Welch
David Welch
21:44 05 Dec 19
First class product and excellent after sales attention - even when out of guarantee
Derek Shanks
Derek Shanks
09:44 01 Dec 19
I bought a 10 year old house with a Kensa Ground Source Heat Pump last year. Recently, my hot water has not been as... hot as usual so I contacted Kensa for some advice. Bear in mind this is a 10 year old heat pump, well out of warranty . . . They could not have been more helpful! I have spent at least a couple of hours on the phone with Todd from their technical support team. He helped me troubleshoot, talked me through how to open the unit up and check things myself. He sent me some small parts free of charge and I also bought a couple of replacement parts, which he again talked me through how to fit. I have never come across a single company in my entire life that wouldn't charge me for this time. I'm well out of warranty and yet Todd did not hesitate to help. No bill for labour, just patient, friendly advice. What amazing service! Second to none! If I ever need another heat pump I'll be going straight to Kensa. Best customer service I've ever experienced!read more
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