Air Source Heat Pump Installation & Repairs
Plumb London installs, services and repairs air source heat pumps for homes and businesses across London. As a trusted property specialist with over 35 years’ trading history as a family-run London business, and an accredited installer for Nibe and Mitsubishi systems, we bring the same honest, diagnose-first approach to heat pumps that we apply across every trade, properly surveyed, correctly sized, and installed to manufacturer specification.

Looking for Air Source Heat Pump Services in London?
Plumb London installs, services and repairs air source heat pumps for homes and businesses across London. Contact us today for a quote.Our air source heat pump services
Full system survey and heat loss assessment, to correctly size a heat pump for your property
Supply and installation of Nibe and Mitsubishi Ecodan air source heat pump systems
Replacement of ageing gas or oil boilers with a heat pump system
Servicing and planned maintenance, keeping systems efficient and within warranty
Fault diagnosis and repair
Controls, zoning and hot water cylinder integration
Refrigerant work carried out to F-Gas requirements

Plumb London Air Source Heat Pump Services
A heat pump is only as good as the survey behind it. Correct sizing depends on an accurate heat loss calculation for the property, the condition and size of existing radiators or underfloor heating, and the practicality of the outdoor unit’s position. We carry out a full survey before recommending a system, and give you an honest assessment of whether your existing heat emitters are suitable or need upgrading as part of the job, rather than fitting a heat pump to a system that was never designed for it.
We do not yet have a dedicated air source heat pump case study to link here. As related evidence of our approach to full heating system replacement and honest diagnosis before recommending change, see our case studies on a central heating upgrade in Worcester Park and a boiler replacement in Palmers Green. Both are gas boiler projects, not heat pumps, but they show the same survey-led, honest-diagnosis approach we bring to every heating system replacement. This section should be updated with a genuine heat pump case study as soon as one is available.
Air source heat pumps use refrigerant in the same way as air-conditioning systems, and that refrigerant is regulated under F-Gas legislation. All refrigerant work is carried out by suitably certified engineers, using certified recovery equipment. Correct commissioning and regular servicing protect both the system’s efficiency and its manufacturer warranty over its working life.
We are an accredited installer for both Nibe and Mitsubishi air source heat pump systems, giving you access to manufacturer technical support and warranty backing on every installation. Our engineers are trained on both ranges, from Nibe’s high-end residential systems through to Mitsubishi’s Ecodan range, and will recommend the system that genuinely suits your property rather than a single default option.
A correctly specified heat pump installation can offer:
- Lower running costs compared with an ageing or inefficient boiler, depending on the property and tariff
- Reduced carbon emissions from home heating
- A quieter, lower-maintenance alternative to a combustion appliance
- A potential improvement to a property’s EPC rating
We give an honest assessment of expected performance for your specific property rather than generic figures, heat pump performance depends heavily on insulation, emitter sizing and system design.
We understand that most heat pump installations take place in occupied homes. Our team plans the works, including any necessary upgrades to radiators, pipework or hot water cylinders, to minimise disruption and keep you informed of the programme from survey through to commissioning.
- An accredited installer for Nibe and Mitsubishi air source heat pump systems
- A trusted property specialist, over 35 years’ trading history as a family-run London business
- Honest, survey-led sizing. We recommend what your property actually needs, not a default system
- Transparent quotations with no hidden costs
- Full F-Gas compliant refrigerant handling
- Clear communication from survey through to commissioning
In Your Area
We install and service air source heat pumps for homes and businesses across London, including Chelsea, Watford, West Ham, Ealing, Acton, Bayswater, Bloomsbury, Covent Garden, Camden, Chiswick, Finsbury Park, Fulham, Hampstead, Harrow, Highgate, Holland Park, Islington, Kensington, Marylebone, Muswell Hill, North Finchley, South Kensington, West Hampstead, Westminster, Willesden, East Ham, Streatham
Frequently Asked Questions
Most homes can be suitable, but suitability depends on insulation levels, the size and type of your existing radiators (or underfloor heating), and available outdoor space for the unit. We carry out a full survey and heat loss assessment before recommending a system, and will tell you honestly if upgrades to emitters or insulation are needed alongside the heat pump.
A heat pump extracts heat from outside air rather than burning fuel, and typically runs at lower flow temperatures than a gas boiler. This usually means larger radiators or underfloor heating perform better with a heat pump than small, older radiators sized for a boiler. Our survey identifies where this matters for your property.
Yes. Nibe is a well-regarded manufacturer known for high-end residential heat pump systems, and Mitsubishi’s Ecodan range is one of the most established air source heat pump lines on the market. As an accredited installer for both, we can recommend whichever suits your property and budget rather than being limited to one brand.
Ask us about current requirements when you get in touch, grant schemes and certification requirements (such as MCS) change periodically, and we’ll confirm exactly what applies to your project and what we handle on your behalf at the time of quoting.
Customer Testimonials
Don’t just take our word for it, here’s a selection of the latest reviews. You can view more here.
★★★★★Plumb London were brilliant from quote to completion. Firstly, they are very competitively priced and I had very little hesitation going with their quote for a new boiler. I was also really impressed ..Read More
Ashley Watkinson
★★★★★Our boiler was leaking and Nicola fixed it the day it happened. Highly recommended!
Kathy Weston
★★★★★Brilliant service, friendly engineer and a job completed quickly and tidily. I would use the company again if I ever need to. Swanscombe, Kent
Collin Best
★★★★★Plumb London were able to come quickly and fix my problem without fuss, quoting a sensible price.
Robert Slater
★★★★★My toilet seat was broken and previous plumbers I contacted told me it was a non-standard toilet and I had to get a new toilet. I invited over Plumb London and they told me that the toilet seat can be..Read More
Geoffrey Payne
★★★★★Plumb London provided excellent service from start to finish! The boiler installation was quick, tidy, and professionally done. A year later, the same engineer carried out an efficient and thorough ma..Read More
George Ezeanaka
★★★★★Fantastic experience all around. The customer service team at PlumbLondon is not only responsive and super-friendly, but actually take initiative - we had our job done a day early because a team membe..Read More
Eleanor Franzén
★★★★★Plumb London carried out a boiler and gas safety check for me. They were quick to get booked in, the team were polite and professional, and their pricing was more competitive than others I contacted. ..Read More
Louise Kaufhold
★★★★★A Five Star service. The range of skills and craftsmanship displayed by Mounir were incredible. Would recommend to anyone with dreams of creating a Dream Kitchen. With this Team, it’s not just possi..Read More
Trevor Beattie
★★★★★Easy to communicate with and quick work to solve the problem we had
Josh Evans
★★★★★Excellent service from start to finish, everything was handled professionally and efficiently. Communication was clear throughout, and Louise did a great job coordinating everything and keeping me in..Read More
Claire Willis
★★★★★Plumb London were brilliant. Stephan turned up on time, was very personable and was very efficient. Would definitely recommend and will be using again in future.
Eleanor Rider
★★★★★For the second year in a row, the lovely Mo serviced our boiler. He was on time and provided a super thorough service. I would really recommend Plumb London as your plumbing company. 5 stars all round..Read More
Dianah Jane Coleman
★★★★★Very fast service. We got our boiler changed as an emergency a year ago, and got service this year. Both times Plumb London were booked within 24h of being called, with the team taking good care of en..Read More
Alexandra Fleming
★★★★★Great professional service from start to finish. The team did an excellent job installing a Powertank and paid close attention to detail throughout. I’ve used them a couple of times now and have alw..Read More
Kevin Senior
★★★★★Absolutely exceptional service. Cannot recommend enough. Polite, attentive and understanding of the situation. Par and Stephan who attended my property were courteous and professional, making the horr..Read More
Max Hurd
★★★★★I can’t fault the service I received. Prompt, courteous and so accommodating. It’s so easy to be ripped off, PlumbLondon are overwhelmingly decent, thorough and reliable. A million percent recomme..Read More
Kate Comer
★★★★★Amazing job the works is done very professionally I will not hesitate to use your company again and recommend to friends.
Renato Balane
★★★★★Very professional and comprehensive service.
Stuart Highley
★★★★★Fast service (next day) for the initial assessment of the issue. Then, even though it was not an emergency per se (needed broken shower pump replaced and associated inter-connecting pipe work), the te..Read More
Jeff Smith
★★★★★a five-star service
David Akers
★★★★★I had a great experience with Plumb London. They came out quickly to inspect an issue with my water tank, identified the problem right away, and got everything sorted efficiently. The engineer was pro..Read More
Patrick Fuller
★★★★★good job well done boiler replacement
Deirdre Bell
★★★★★Contacted Plumb London hi Charlie, come round and give me a quote within days. Carried out. I ordered all the parts and even matched The new tiles with the existing. Hardly recommend them very profess..Read More
Vimal Sharma
★★★★★Very professional. The work was carried out efficiently and quickly.
matt o'neill
★★★★★Amazing job the works is done very professionally I will not hesitate to use your company again and recommend to friends.
Renato Balane
★★★★★Fantastic service, efficient and easy to organise. Reliable and fair pricing
Jane Renton-Rose
★★★★★We recently worked with Plumb London at AKA Marylebone and were extremely impressed with their professionalism and technical expertise. The project involved complex plantroom systems and ongoing comm..Read More
shellie-ann delaney
★★★★★Excellent service. I've used Plumb London multiple times and they're always professional (they pick up the phone and arrive when they say they will). For example, my boiler had been leaking but only o..Read More
Sebastian Robinson
★★★★★The initial consultation from Plumb London was excellent, and then a call received quickly do explain a detailed quote. The appointment for the work was quick and the work to the bathroom carried out ..Read More
Nick M
★★★★★Had a new boiler installed 4 years ago, best decision. They have looked after it well and every service is efficient, quick and easy. They are fantastic to book with, always answer the phone and any i..Read More
Milly Smith
★★★★★Big thumbs up for Plumb London, in particular the engineer (Andrew) who visited the property where my elderly mother lives. A gentle manner and patient approach was exactly the level of kindness that ..Read More
Patrick Totty
★★★★★Prompt and efficient service from Plumb London. A clear and comprehensive quote was provided and the job was completed well. Our ancient boiler completely stopped working and they were able to visit t..Read More
Simone Thomas
★★★★★Plumb London were absolutely incredible. We were in an emergency situation, and Jack did everything he possibly could to get a new boiler out to us as quickly as possible. He also liaised directly wit..Read More
Lily Macpherson
★★★★★Fabulous and prompt service. Kept up to date; great communication.
Paula Kennedy
★★★★★Great job, quick efficient and fair price
Daniel Dean
★★★★★Delighted with the service from Plumb London on a number of occasions. Very reliable and professional.
Thomas Jacques
★★★★★The service from Plumb London was prompt and they have solved the problem as I have still not had a complaint from my tenants It was very easy to deal.with the staff at Plumb London.
Shubha Kasbekar
★★★★★Excellent service from engineer who attended to change kitchen tap. Punctual, courteous and knowledgeable. Got the job done despite an unexpected issue with some complex piping (resolved on the spot)...Read More
Constantia Smith
★★★★★Excellent service by Plumb London, fixed two bathroom related issues in a couple of days - clear communication and good management of expectations in terms of works and timeline, which I always apprec..Read More
Sandra Obradovic
★★★★★Really happy with the service from Plumb London for my toilet repair. We're quick to attend and Charlie was very knowledgeable, getting the specific part needed and even providing advice on some other..Read More
Darren Phillips
Ashley Watkinson
Chessington
Via Google
Plumb London were brilliant from quote to completion. Firstly, they are very competitively priced and I had very little hesitation going with their quote for a new boiler. I was also really impressed with the service. Mo and his colleague were very friendly and took time to explain everything to me. Despite it being a big job (new boiler, thermostatic valves, and work on the exit flues), having to work around me and my wife working from home and needing to order some parts, the work was all done in a day. I was very happy that 2 people were committed to the job and it could all be done so efficiently so that we didn't have to wait over a weekend for the work to be finished. Update 24/08/2025: I have since had Plumb London out for the boiler's annual servicing, as well as some work on the flue in the loft after it was left unsupported after my chimney breast was removed. The latter was particularly urgent as the boiler was failing to remain fired and carbon monoxide was detected. I am always impressed with their availability and reliability. On the fix of the flue, Vladko made sure everything was made safe, talked me through his investigations and what needed to be fixed. He took lots of photos and made lots of notes, that were shared with me. The quotes also came through promptly for each stage of the work and customer service team professional and helpful throughout.
Geoffrey Payne
Islington
Via Google
My toilet seat was broken and previous plumbers I contacted told me it was a non-standard toilet and I had to get a new toilet. I invited over Plumb London and they told me that the toilet seat can be replaced and they went ahead and did it. I was delighted, it saved me a lot of money.
George Ezeanaka
Thamesmead
Via Google
Plumb London provided excellent service from start to finish! The boiler installation was quick, tidy, and professionally done. A year later, the same engineer carried out an efficient and thorough maintenance check. He also provided clear advice and ensured that everything was running perfectly. Reliable, friendly, and highly recommended!
Eleanor Franzén
Wimbledon
Via Google
Fantastic experience all around. The customer service team at PlumbLondon is not only responsive and super-friendly, but actually take initiative - we had our job done a day early because a team member called us with news that our plumber had had a cancellation. The plumber himself was superb, professional and cheerful, worked very efficiently and left us with a brand-new shower in perfect working order. We're so grateful!
Louise Kaufhold
Kingston Upon Thames
Via Google
Plumb London carried out a boiler and gas safety check for me. They were quick to get booked in, the team were polite and professional, and their pricing was more competitive than others I contacted. A great experience overall, I’ll definitely use them again
Trevor Beattie
Islington
Via Google
A Five Star service. The range of skills and craftsmanship displayed by Mounir were incredible. Would recommend to anyone with dreams of creating a Dream Kitchen. With this Team, it’s not just possible, it’s Guaranteed.
Claire Willis
Thornton Heath
Via Google
Excellent service from start to finish, everything was handled professionally and efficiently. Communication was clear throughout, and Louise did a great job coordinating everything and keeping me informed. They arranged access directly with my tenant, which made the whole process very easy for me as a landlord. Vlatko, who carried out the boiler service and gas safety certificate, was extremely thorough and professional. There was also a suspected additional issue on the day with the washing machine, and the team responded very quickly, providing me with prompt and clear email reassurance. This was especially appreciated, as I do not live near the property, so I felt in safe hands throughout. I always experience a reliable and professional service from Plumb London — I would definitely recommend and will continue to use them in the future.
Dianah Jane Coleman
Kensington
Via Google
For the second year in a row, the lovely Mo serviced our boiler. He was on time and provided a super thorough service. I would really recommend Plumb London as your plumbing company. 5 stars all round!
Alexandra Fleming
Wimbledon
Via Google
Very fast service. We got our boiler changed as an emergency a year ago, and got service this year. Both times Plumb London were booked within 24h of being called, with the team taking good care of ensuring everything is up and running. Would recommend!
Kevin Senior
Richmond
Via Google
Great professional service from start to finish. The team did an excellent job installing a Powertank and paid close attention to detail throughout. I’ve used them a couple of times now and have always been impressed. Highly recommended!
Max Hurd
North Kensington
Via Google
Absolutely exceptional service. Cannot recommend enough. Polite, attentive and understanding of the situation. Par and Stephan who attended my property were courteous and professional, making the horror of having a boiler replaced as smooth sailing as possible.
Kate Comer
Chiswick
Via Google
I can’t fault the service I received. Prompt, courteous and so accommodating. It’s so easy to be ripped off, PlumbLondon are overwhelmingly decent, thorough and reliable. A million percent recommended.
Jeff Smith
Bexley
Via Google
Fast service (next day) for the initial assessment of the issue. Then, even though it was not an emergency per se (needed broken shower pump replaced and associated inter-connecting pipe work), the team managed to source the part and fit me in the very next day. Engineer was polite, knowledgeable and very professional. A pleasure to have in the house and left us very happy customers! Will definitely use again!
Patrick Fuller
Woolwich
Via Google
I had a great experience with Plumb London. They came out quickly to inspect an issue with my water tank, identified the problem right away, and got everything sorted efficiently. The engineer was professional, friendly, and clearly knew what he was doing. It’s such a relief to have everything working properly again. I’d happily use them again and definitely recommend their service to others.
Vimal Sharma
Wimbledon
Via Google
Contacted Plumb London hi Charlie, come round and give me a quote within days. Carried out. I ordered all the parts and even matched The new tiles with the existing. Hardly recommend them very professional and very satisfied with the results.
Trevor, N1, Trustpilot
Islington
Via Trust Pilot
“5-Star service from a 5-Star company. Faced with the daunting and complex issues of leakage, flooding, structural damage and extensive restoration work, Plumb London’s Dynamic Duo of Mounir & Ali responded like Super Heroes. I found the team to be skilled, thoughtful, professional, hardworking, punctual, efficient and informative… Consummate craftsmanship. I would highly recommend them.”
shellie-ann delaney
Marylebone
Via Google
We recently worked with Plumb London at AKA Marylebone and were extremely impressed with their professionalism and technical expertise. The project involved complex plantroom systems and ongoing commercial PPM works in a busy hospitality environment. Their engineers demonstrated a strong understanding of interconnected mechanical systems, quickly diagnosing issues and carrying out preventative maintenance with minimal disruption to operations. Communication was clear, reporting was thorough, and their proactive approach helped identify potential risks before they became problems. Reliable, knowledgeable, and highly professional, we would highly recommend Plumb London
Sebastian Robinson
Whitechapel
Via Google
Excellent service. I've used Plumb London multiple times and they're always professional (they pick up the phone and arrive when they say they will). For example, my boiler had been leaking but only occasionally without a discernable pattern. Over the course of a couple of trips and some impressive detective work my Plumb London plumber was able to diagnose a pretty complicated issue, explain it in layman's terms order the part required then return and fix it.
Nick M
Kinsbury
Via Google
The initial consultation from Plumb London was excellent, and then a call received quickly do explain a detailed quote. The appointment for the work was quick and the work to the bathroom carried out quickly and expertly by Mounir to a high standard. From start to finish a seamless service and a very happy customer.
Milly Smith
Kensal Green
Via Google
Had a new boiler installed 4 years ago, best decision. They have looked after it well and every service is efficient, quick and easy. They are fantastic to book with, always answer the phone and any issues they can deal with quickly. Highly recommend.
Patrick Totty
Westcombe Park
Via Google
Big thumbs up for Plumb London, in particular the engineer (Andrew) who visited the property where my elderly mother lives. A gentle manner and patient approach was exactly the level of kindness that gave her reassurance and comfort. The work was undertaken out of hours to accommodate her, and was fulfilled without issue.
Simone Thomas
Upper Norwood
Via Google
Prompt and efficient service from Plumb London. A clear and comprehensive quote was provided and the job was completed well. Our ancient boiler completely stopped working and they were able to visit the same day at a reasonable price and get it working, buying us some time to get a new boiler sorted. We compared the new boiler quote from Plumb London with other companies but preferred the overall offering from Plumb London. Thanks a lot to Jack for coordinating this all for us. Thanks also to the engineers who were tidy and ensured no mess was left behind.
Lily Macpherson
Grove Park
Via Google
Plumb London were absolutely incredible. We were in an emergency situation, and Jack did everything he possibly could to get a new boiler out to us as quickly as possible. He also liaised directly with the engineer, explaining that it might be difficult for us to reach the property in time — and the engineer was extremely understanding and adaptable, which made the whole situation so much less stressful. The engineer himself was lovely. He installed the new boiler professionally and took the time to talk everything through with us, making sure we understood how it all worked. Nothing felt rushed, and we felt completely looked after. The following day, Jack even called back to check that everything had gone smoothly — which we really appreciated. We’ve had some challenging experiences with tradespeople in the past, but everyone at Plumb London was outstanding. We wouldn’t hesitate to use them again and will absolutely be turning to them for any future help.
Constantia Smith
Finchley Central
Via Google
Excellent service from engineer who attended to change kitchen tap. Punctual, courteous and knowledgeable. Got the job done despite an unexpected issue with some complex piping (resolved on the spot). Good communication from the office staff also. Would use again.
Sandra Obradovic
Penge
Via Google
Excellent service by Plumb London, fixed two bathroom related issues in a couple of days - clear communication and good management of expectations in terms of works and timeline, which I always appreciate.
Darren Phillips
Peckham
Via Google
Really happy with the service from Plumb London for my toilet repair. We're quick to attend and Charlie was very knowledgeable, getting the specific part needed and even providing advice on some other issues I had.
Mark
South Norwood
Via Trust Pilot
Quick response and great service I called Plumb London out as there was an issue with my boiler's ignition. They managed to send an engineer out very quickly. He not only managed to solve the problem, but also helpfully explained what the issue was and how to avoid it in the future. Would definitely recommend their services.
Aleksandar
Forest Hill
Via Trust Pilot
Great customer service Had a leak that needed fixing and the customer support team was great at arranging a quick call out for the issue on very short notice. The contractor was punctual, tidy and quick diagnosing the problem promptly and fixing it. Would definitely use their services again if needed!
Omar
Finchley Central
Via Trust Pilot
Efficient service Organisation was well organised, courteous and coordinated the work well with calls to keep me informed of what was happening, The engineer was diligent and experienced and completed the job quickly
Harry
Chigwell
Via Trust Pilot
Some disappointments but overall satisfactory Some disppointing aspects but the work itself was overall satisfactory. What they did: Plumb London replaced our shower trap, reconfigured the pipework underneath the shower tray inside and sorted poor configuration outside the building, and remasticed the shower area. The negatives - The mastic work was very expensive for what it was. I expected the whole shower area for the quote we were given but it was just around the edge of the tray in the end, not up the/ corners or joins of the glass doors. That cost £400. There was a mishap with payment where they didn't take into account our deposit so I was double charged and I had to correct this, whether they would have caught and realised eventually I don't know. Debris and dirt like the old rotten mastic was unfortunately swept underneath the shower tray rather than properly disposed of and it does bother me when a workman uses our own towels for mopping up water and dirt, I would always think a workman would know to bring their own rags/towels for that kind of thing. Positives - The customer service over the phone is prompt and approachable. The work itself has been satisfactory and all appears to be working fine with no leaks etc. The plumber was pleasant and got on with work. Not perfect decorators finish afterwards but they do warn of this if the work needs to be invasive and drill through walls etc, but it's fine for us. Was straight forward and flexible to organise timings and get the job sorted quickly. I would probably use them again for the reliability and ease of arranging, but be more wary of expenses for the work being done, and hope they advise their plumbers to clean up more professionally and not leave the customers own towels wet and dirty for us to clean up.

Coverage Areas
Plumb London provides air source heat pump servicing throughout London, supporting homeowners, landlords, managing agents and commercial clients across:
Our regional pages provide more detailed information about the properties, heating systems, completed work and individual locations we cover within each part of London.
Looking for Air Source Heat Pump Services in London?
Plumb London installs, services and repairs air source heat pumps for homes and businesses across London. Contact us today for a quote.Local & Trusted
Air Source Heat Pump Services
Here at Plumb London our engineers in London are always on hand to help. Air Source Heat Pump Services include heat loss surveys, heat pump installation, boiler replacement, servicing and maintenance, fault repairs, controls and cylinders, and F-Gas refrigerant work.
Case Studies
Air Source Heat Pump Services Across London: Our engineers carry out air source heat pumps servicing across London every week. Below, you can see a selection of our recently completed and verified air conditioning jobs across the city.

































