Key advantages of the Twin Compact

Powerful yet power-saving

With energy efficiencies of up to A++, the Twin Compact can maximise the Renewable Heat Incentive (RHI) income and reduce running costs.

Large single-phase heat pump

The 24kW Low Temperature Twin Compact offers an impressively high thermal output for single phase electricity.

Heat demands up to 60°C

Perfect for greater heat loads, the High Temperature Twin Compact model takes on high and constant heat demands.

High demand & efficiency combined

Combining efficient space heating with 60°C hot water temperatures, the Hybrid model offers the perfect blend of comfort and efficiency.

Rewarding payback

Benefit from a rewarding return through the government’s Renewable Heat Incentive (RHI).

The Twin Compact range is now discontinued. But why not browse Kensa’s latest ground source heat pumps?

A powerful performance

The Twin Compact series flaunts powerful yet power-saving systems. Boasting a bigger heat capacity thanks to the use of two compressors, the Twin Compact models still achieve Energy-related product (ErP) efficiencies up to A++.

Each model brings its own unique advantage. Delivering high output for single-phase supply, the Standard Twin Compact range features one of the largest single-phase ground source heat pumps on the market (24kW). Providing temperatures up to 50°C, each model is the perfect match for low-flow heating distribution systems.

Next up is the Hybrid model. Using an efficient blend of high and low-temperature refrigerants, the Hybrid Twin Compact delivers the best of both low-flow space heating temperatures and domestic hot water up to 60°C.

Kensa’s High Temperature model produces heating and hot water to 60°C without the high emissions or maintenance you’d expect from gas and oil. A resilient range, the High Temperature Twin Compact takes on the greatest heating loads in applications with high and constant demands – from holiday lets to shower blocks.

The Three Phase Twin Compact model is ideal for the high heat demands of larger, three phase properties – offering an impressive capacity of up to 30kW.

"Our family and guests have always had ample hot water, our house is warm throughout the year for the first time ever and we don’t have to worry about buying oil!"

The Phillips family - Holiday business owners

Affordable & rewarding heating

Lucrative RHI returns

The MCS-approved Twin Compact provides a generous, tax-free income from the RHI. Lasting over a 7-year period under the Domestic RHI, the incentive offers rewarding returns.

On top of funding, the low-maintenance and low-running-cost Twin Compact has no annual servicing requirements over its 20-year design life.

Lifetime technical support

Besides the Twin Compact’s 5-year guarantee, end users and installers have access to Kensa’s technical support for the system’s lifetime. This includes anything from design guidance to post-installation support.

See costs & payback

Higher efficiencies for lower costs

To balance demands in larger buildings, each Twin Compact model efficiently modulates between full and half heating loads. Not only does this reduce power consumption, but ultimately saves on heating bills.

To produce the desired temperatures at the highest efficiency, the Twin Compact features two temperature setpoints – one for heating and one for domestic hot water. No costly direct immersion heaters necessary.

"I’m very pleased with the ground source solution from Kensa. We’ve lived in the house through one of the coldest winters we’ve had for years and have been perfectly warm. We just don’t think about it. The house is warm and the system comes on when it needs to."

Rory Jenkins - Homeowner

Simple to install & commission

Kensa’s installation support

With Kensa’s unrivalled services, installing the Twin Compact heat pump couldn’t be easier.

Find an installer
Tell us about your plans for a Kensa-approved installer recommendation.

MCS support
MCS or non-MCS installers are welcome to use Kensa’s MCS Umbrella Service for support with design, installation and paperwork. This qualifies the end-user for the RHI income.

"I love the technology – the idea of harnessing free heat from the ground is so simple and Kensa’s kit is top of the range."

Richard Waterstone - Homeowner

See more reviews

The Twin Compact range is now discontinued. But why not browse Kensa’s latest ground source heat pumps?

Unrivalled technical support

Twin installers and end users can call our dedicated technical team for advice on anything from design, commissioning and installation to post-installation guidance. Available for the Twin Compact’s lifetime.

See how we support you

The Twin with an ocean view

Homeowner, Rory, built his dream home by the sea. Bringing his eco-inspired vision to life, the Hybrid Twin Compact delivers heating and hot water to Rory’s picturesque property.

See Rory's case study

The Twin Compact range is now discontinued. But why not browse Kensa’s latest ground source heat pumps?

Models & Costs

Twin Compact models

Standard models (single phase)

16kW, 20kW and 24kW models deliver temperatures to 50°C.

Hybrid models (single phase)

15kW and 21kW models blends R134a and R407c refrigerant to deliver efficient space heating and high water temperatures to 60°C.

High Temperature models (single phase)

12kW and 17kW models deliver temperatures to 60°C.

Three Phase models

20kW, 24kW, and 30kW models suit high heat demands of larger, three phase properties.

Twin Compact costs

Standard models

16kW – 24kW from £9,230 – £ 11,207

Hybrid models

15 kW – 21kW from £9,230 – £11,207

High Temperature models

12kW – 17kW from £9,230 – £11,207

Three Phase models

20kW – 30kW from £10,098 – £12,075


*List prices exclude VAT.

Submit your plans for a quote

Factors such as heat demand, energy efficiency and the building’s insulation levels will determine the right model for your project.

Get a quote for a better idea of project costs and payback.

Get a quote

Performance features

Electrical ‘soft starts’, a DNO (Distribution Network Operator) friendly feature, are fitted as standard on single-phase units to ensure peak electrical starting load is minimised.

In-built water pumps for both the load side and ground side of the Twin Compact unit.

Weather compensation is fitted as standard to track outside temperatures and adjust heat accordingly.

Copeland fixed speed scroll compressor with a minimum design life of 20 years.

Installation features

With in-built sensors and probes, the Twin Compact heat pump can be remotely commissioned by Kensa’s technical support team.

Speedfit connections located underneath the unit allow fast installation.

Designed to be installed within an out-house building or protective shelter.


Twin Compact components

Core heat pump unit (refrigeration components)

Controller & water pumps


5 years

2 years


MCS accreditation

Microgeneration Certification Scheme (MCS) approval ensures quality and qualifies the Twin for the RHI.

ISO9001 approval

The Twin Compact is manufactured in an ISO9001 approved facility.

Up to A++ in energy efficiency

A+ – A++ Energy-related Product (ErP) rating.


900mm high

900mm wide

570 deep

Twin Compact series technical data

Model RangeStandardStandardStandardHigh TemperatureHigh TemperatureHybridHybridThree PhaseThree PhaseThree Phase
Nominal thermal kW rating at B0/W3516202412171521202430
Nominal thermal kW rating at B0/W6011.315.3
Nominal thermal kW rating at B0/W651115
Part NumberC160-T1HC200-T1HC240-T1HH124-T1HH170-T1HM150-T1HM210-T1HC200-T3HC240-T3HC300-T3H
MCS ApprovedBBA0055/07BBA0055/08BBA0055/09BBA0055/28BBA0055/29BBA0055/32BBA0055/33BBA0055/13BBA0055/14BBA0055/15
Performance data - rated heating output at B0/W35 BS EN14511
Power consumption5.
Co-efficient of Performance at B0/W354.
Co-efficient of Performance at B0/W652.082.12.312.392.3
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/min52.761.275.43943.947.1670.1461.576.291.6
Pressure drop kPa at design flow rate11.215.322.26.7912.612.822.715.422.631.5
Max inlet temperature ?C15151520201515151515
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)-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/min50.658.47240.248.844.0361.8658.271.885.9
Pressure drop kPa at design flow rate9.312.318.75.948.717.113.912.318.626.5
Max flow temperature ?C***55555565656565555555
Electrical values at B0/W35
Rated voltage220 - 240V / 50Hz220 - 240V / 50Hz220 - 240V / 50Hz220 - 240V / 50Hz220 - 240V / 50Hz220 - 240V / 50Hz220 - 240V / 50Hz400 V / 50 - 60 Hz400 V / 50 - 60 Hz400 V / 50 - 60 Hz
Power supply rating amps63636350505060253232
Rated current (max) amps43.752.565.442.948435818.923.627
Typical running current at B0/W35 amps27.42835.426.927.9252912.215.217.5
Starting current amps ****44444842424448556879
Refrigerant circuit
Process mediumR407CR407CR407CR134aR134aR407c/R134aR407c/R134aR407CR407CR407C
Fill volume kg2.22.42.622.61.0 / 1.41.3 /
Compressor typeScrollScrollScrollScrollScrollScrollScrollScrollScrollScroll
H X W X L (mm)900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570900 x 900 x 570
Dry weight kg167170180165167167180170180185
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 (speedfit) mm50505028505050505050
Heating flow and return (speedfit) mm28282828502828282828
Performance (based on Average Climate) @ 35?C
ErP ratingA++A+A+A++A++A++A+A++A+A+
Seasonal space heating energy efficiency152%145%147%151%153%158%149%158%145%140%
Performance (based on Average Climate) @ 55?C
ErP ratingA+A+A+A+A+A+A+A+A+A+
Seasonal space heating energy efficiency119%118%110%118%123%122%117%124%117%116%
Sound Power Level
Sound Power Level (dB)58596164606663595959
* 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 efficiency of the unit will drop and the COP decreases.
**** Kensa single pumps 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.
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.

Achieve an MCS-accredited installation 
with Kensa’s MCS Umbrella Service.

Lifetime technical support

“Can’t recommend Kensa enough. Great product, phenomenal customer service.”

“First class product and excellent after sales attention – even when out of guarantee”



Case study reviews

Twin Compact Ground Source Heat Pump

"We realised that we could get the whole thing paid for with the Renewable Heat Incentive, including the installation. Plus, we’ve ended up with a system where the yearly cost of electricity is less than we would have been paying for gas.”

Keith Clarke - Grade II listed homeowner

See case study

Large, Grade II listed farmhouse

24kW Single Phase Twin Compressor

Highly efficient water source system

Replaced mains gas boiler

Pond mats sunk into lake

Costs covered by Renewable Heat Incentive

Twin Compact Ground Source Heat Pump

"Our family and guests have always had ample hot water, our house is warm throughout the year for the first time ever and we don’t have to worry about buying oil!"

The Phillips family - Holiday business owners


6-acre luxury holiday development

Kensa 21kW Hybrid Twin, plus solar thermal

Heating the farmhouse, holiday cottage & facilities block

x 4 127m horizontal boreholes

Radial drilling method

Eligible for the Non-Domestic RHI

Twin Compact Ground Source Heat Pump

"I love the technology – the idea of harnessing free heat from the ground is so simple and Kensa’s kit is top of the range. I often show visitors our heat pump unit and they are blown away by the efficiency and simplicity of our heating system. I’m really pleased with how it’s working.”

Richard Waterstone - Homeowner


Part Medieval, part Victorian and part new-build

Renovated inn and granary building

24kW Twin in main house

Supplied by 300m of slinky pipes under a paddock

Supplied by two 200m boreholes

Eligible for the RHI

Twin Compact Ground Source Heat Pump

"I’m very pleased with the ground source solution from Kensa. We’ve lived in the house through one of the coldest winters we’ve had for years and have been perfectly warm. We just don’t think about it. The house is warm and the system comes on when it needs to."

Rory Jenkins - Homeowner


300m² detached new build property – 3 storeys, 3 bedrooms

Separate office and self-contained flat

15kW Kensa Hybrid Twin GSHP for heating & hot water

5000kWh for hot tub

3x 100m boreholes.

Twin Compact Ground Source Heat Pump

"[My clients] rely on a steady supply of heating and hot water for their B&B business and have been very pleased with the efficiency of the ground source heat pump system so far. In fact they have been using it as a selling point to market their business as a ‘green’ place to stay."

Installer - Total Renewable Solutions

See case study

Project overview

300m² B&B & holiday let with 3-bed house & 2-bed annexe

21kW Kensa Hybrid Twin Heat Pump

Replacing an oil boiler system

x 5 pond mats with 250m slinky coil sunk into nearby lake

85m of pipe under paddock connecting lake to house

Twin Compact Ground Source Heat Pump

"This house is a 19th century stone building and a good example of how a ground source heat pump system can be effective in an older property. It keeps us perfectly warm day and night and we can programme the system through the thermostat to run exactly as we like it."

Mr. Hart - Homeowner

See case study

Project overview

Listed country house

Kensa 24kW Twin Compressor

Replaced oil boiler system

Providing space heating

Slinky trenches in nearby field under front lawn

1400m of pipe, x100m loops

Kensa Google reviews

darren H.
darren H.
21:42 07 Sep 21
Excellent ‘after-care’ and technical help on a product installed many years ago in a property I’ve... just moved into. It’s reassuring to be able to go through the heat pump and clarify my understanding and solve pressure issues simply by being talked through it all on the phone. Thanks for your time folk.read more
16:29 11 Mar 21
Had a really informative conversation with their Sales team. I was originally looking at installing... a ground source heat pump. However I was pointed in the direction of an air source pump which isn't one of their products but would be better suited for my property. Clearly putting customer service first! I would highly recommend you to get a quote from them.read more
Wayne R.
Wayne R.
14:16 02 Feb 21
Having had a lengthy search to find someone that actually knew what they were talking about when it... came to ground source heat pumps, we found Kensa. When we called we thought we were getting the receptionist, but in fact we got Daisy. She knew more about what she was selling than anyone else we had spoken to. Clearly knew her stuff, and instantly put our minds at ease. She worked out a detailed quote and nothing was too much trouble when we asked questions or wanted to change something.Installation was quick, clean, and everything was explained in a language we could understand. We were then given a complete system booklet, again explaining what to do if we have any issues or need to change anything on the systemDaisy and the whole Kensa team have been nothing but professional, capable and courteous from start to finish.Thoroughly recommend Daisy and the whole of the Kensa team to anyone who needs a GSHP.read more
oy D.
oy D.
16:33 21 Jan 21
The plumbers and the resident liaison officer did a great job on my block on Drygate walk 2-8.... Thanks you guys.read more
posh and F.
posh and F.
21:53 20 Jan 21
Thank you so much Demi for your help during my sister heating installation last week, housing... didn't care but you were so helpful,Thank you.read more
aslan B.
aslan B.
11:50 18 Jan 21
The workmen are friendly and polite and dispıte beıng so streched nothing iş too much trouble. The... system iş a little cooler then my old heating system but overall its goodread more
Sue H.
Sue H.
16:42 15 Dec 20
I installed a Kensa Ground source heat pump in 2015 and am really pleased. I also have solar PV and... solar thermal so this form of heating is absolutely essential. Made in Cornwall !!read more
Allan T.
Allan T.
14:21 10 Nov 20
We installed our heat pump in 2007, yes..13 years ago. It has been an excellent and reliable... investment that has performed exactly as planned. Support from Kensa can only be described as outstanding. Any call for support is quickly answered by knowledgeable engineers, who work with you to diagnose and resolve the fault or diagnose the issue and then send the right resources to fix the system. They clearly keep a sense of ownership and pride in what they make and install and are patience personified in the way they deal with lay customers. Top marks from me and thanks in particular to Tom with a recent sensor failure that proved difficult to identify.read more
Nigel D.
Nigel D.
18:16 09 Nov 20
I am delighted with the service provided by Kensa. I purchased a ground source heat pump from this... company in 2014 and I have been very pleased with my purchase. When help is required the very able technical team are always accessible and very willing to assist. I am very happy to recommend this company to anyone considering to invest in a ground source heat pump.read more
Steve A.
Steve A.
13:44 13 Oct 20
We have a Kensa GSHP, the pump is reliable, needs little servicing and is both environmentally and... uses only a little electricity. Todd in tech support is THE most helpful and informed person you will come accross...what's not to like?read more
John G.
John G.
15:10 06 Oct 20
We recently had a Kensa Heat Pump installed at our new build Hobbit Hole holiday let. Nothing about... this whole build was easy but we opted for Kensa for our renewable energy. Brilliant decision from the start, the product layout, working with our staggered delivery requests due to a just in time scheme adopted for the build, to literally holding our hand during the self installation process using a heat engineer locally. So helpful, and great to know if we need further guidence, totally confident they are there. John & Rebecca Garrett, Hobbit Hole, Abbotsham,North Devonread more
Michael P.
Michael P.
12:59 06 Oct 20
Can’t thank these guys enough especially Todd his knowledge of these heat pumps is second to none
Martin B.
Martin B.
21:43 02 Oct 20
I had a Kensa heat pump installed in 2017. It has worked really well and saved significantly on... space and water heating costs. The technical support team at Kensa have been absolutely fantastic helping sort out installation issues, responding very quickly and positively to queries and resolving issues very efficiently.read more
Richard J.
Richard J.
07:33 17 Sep 20
great service, very efficient as always
Bharat R.
Bharat R.
19:53 23 Aug 20
I chose Kensa Heat Pumps for our GSHP needs because Steve Costello and the other professionals I... met at home building events always welcomed me and answered all my questions. They introduced me to Howard Smith Builders in Herefordshire who installs many of their pumps and I visited him to see first-hand an installation Howard had done. Back to Kensa. All throughout the build and spec of our pump, Kensa stayed in touch and Steve even visited our home when the work began. I have also been assured that as and when there are software updates for their pumps, Kensa will provide them to me to ensure my pump stays at the optimum level. Thank you, Steve, and Kensa for sticking with me when I needed you to hold my pump for a year with no extra charge! Looking forward to having Lewington’s of Market Harborough finishing the install of your pump and slinkies this Wednesday!read more
Joule E.
Joule E.
17:17 22 Jul 20
I have been using Kensa for a number of years now, and whilst the service is always exceptional... from every member off the team, just recently, and during these trying times, Jacquelyn, James & Maggie have gone the extra mile to ensure my business has kept installing. Really fantastic work guys, much appreciated, thank you, Lee Whiteread more
Mike H.
Mike H.
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 T.
Steve T.
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 R.
Duncan R.
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 T.
Jon T.
20:44 12 Mar 20
The staff at Kensa could not have been more helpfulI 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 C.
Jean C.
20:07 03 Mar 20
We found all Kensa personnel helpful and knowledgeable, especially TomWorth, when our heat... exchanger broke down. Very pleased we purchased Kensa. Peter Lyonsread more
Robert E.
Robert E.
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 N.
Mark N.
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 W.
David W.
21:44 05 Dec 19
First class product and excellent after sales attention - even when out of guarantee
Derek S.
Derek S.
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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