Sustain Heating and Renewables Ltd

I had an Air Source heat pump fitted in February 2025 . It involved re plumbing the whole house- a 200 year old brick walled cottage. Everything was done on schedule and within 2 hours of commissioning I was aware of warmth I hadn’t been used to since the days of coal burning 40 years ago. The installation team were excellent. The only problem I had was getting used to living in a warm house as I had been warned. Unfortunately a fault in the pump occurred in November 2025. I rang the helpline and within an hour the problem had been diagnosed and a replacement pump ordered from the manufacturer. It was delivered the next day. The fitting team arrived at 8.30 am the following day and the new pump was working by 10.30am .All done and completed within 48 hours of the problem occurring. Extremely impressive. The fault with the pump is very unusual I understand . I thoroughly recommend Sustain Renewables .

I had solar and a heat pump installed. It was part of a big project, so they did all the pipe work and UFH as well. They were super flexible with the timing of their work to align with the main builder. Any issues I had, they sent someone over within a day. After a year, here are the main facts: - Gas and energy before cost me £2600/year for a family of 5, after a year of using the heat pump the total spend (including solar sell back and no more gas) came to £1400. This is with the house permanently set at 22degC!! - They clearly explained how it all worked (even letting me record them so I wouldn't forget). Key thing I learnt was to ensure the temperature remains constant (don't let it drop by more than a degree or two over night). - When it gets really cold (i.e below freezing), the cost does go up which can be concerning, but you need to look at it over the whole year. These heat pumps are amazing at the 5-15 degC range (which is the kind of temperatures we have most of the time) - Total solar generated in the year: 5866kWh (With 14 panels) - I use the Octopus Cosy Tarif, which has cheap electricity at certain points in the day... when solar is low, I top up the batteries, then when it's more expensive I use battery to power the heat pump. This alone probably saves me £200 - £300 / year If considering a heat pump (especially if your old gas boiler is on its last legs), go for it with these guys, I can't recommend them enough.

We spent a long time researching solar panels and fittings, holding out for a system that would look clean and discreet on our standing seam roof. The team totally delivered – the panels are ultra low-profile, beautifully fitted, and performing brilliantly. As well as the panels, we had an inverter, battery and solar diverter installed. Everything was integrated neatly and is running smoothly, generating loads of power without any issues. We had a couple of unexpected snags (including a pull-cord our builders had installed, which didn’t pull the electric cables through the wall cavity as planned), but the team were calm, flexible and helpful throughout, working around the issues without fuss. Everything was installed with care and attention to detail, and we couldn’t be happier with the result.

What an absolute pleasure to deal with such a friendly and professional team. From initial phone contact through site survey (by an independent energy consultant) through technical review and design, installation walk through, and finally the installation and commissioning of our new replacement air Source Heat Pump; the team at Sustain, every single one of them, were totally committed to getting the job done despite the difficulties posed by minimising disturbance in an 1850s stone walled cottage. I would have no hesitation in recommending this company.

The quality of installation of my air source heat pump was high, and Sustain Heating were responsive to my requests (mainly to ensure that pipework was as invisible as possible). They were quick to reply by email and easy to reach by phone. The time between first contact and completion of the work was short. Good value for the quality of the work. Highly recommended.

I cannot praise too highly the professionalism of Sustain from start to finish of our heating project. Ours is a 1840 townhouse, five storeys, listed grade 2*, in a conservation area. Sustain commissioned an independent heating survey and built up the specifications for the project in order to meet our requirements for heating. There was an unfortunate 5-month delay while we obtained planning consent from the city council, and then we agreed with Sustain on a start date in the spring. Sustain completed the whole work as promised in eight working days, including two air source heat pumps, new cylinder and total upgrade of the central heating system. We are very satisfied with the finished result.

We commissioned Sustain to install an air source heat pump in 2023, after getting several alternative quotations. Sustain stood out by providing the optimum balance of system design, cost, and knowledge of the technology. After 2 faultless years of heap pump operation, saving us an estimated £600 a year on heating bills (previously an oil-fired boiler), giving us a very cosy warm house, we started looking at the possibility of having a PV solar system installed. Again, Sustain stood out as the best company in terms of cost, size of system, and technical expertise, after having detailed discussions with 2 alternative suppliers. We are very glad that we again chose Sustain for the PV system. Sustain's staff, the roofer, electricians, and office personnel were very easy to get along with and a pleasure to have on site.

We had air conditioning installed by Sustain. From our initial request a site visit and quotation was supplied promptly, followed by installation which again was carried out by people who know their job and were always polite and friendly. Our home was left clean and tidy with all the packaging etc removed, the air conditioning fitted is superb. It was a pleasure to do business with Sustain.

I cannot recommend Sustain highly enough. The customer service and quality of advice was top notch from the start. Knowledgeable people throughout the whole process,kept us fully informed and involved. Installation happened as planned and in a timely manner. Those who came to site were a pleasure to have in the house (and on the roof!), and our batteries and panels work a treat. A top class experience, outstanding service and a pleasure to deal with.

Sustain arrived on time and worked hard to install my heat pump. All of the plumbing is very neat and it all works as expected. They also managed to include my existing Solar Thermal panels. They replaced everything except the panels and I now have a warranty that covers the whole system. The lads could not have been more helpful and I have no hesitation in recommending them

Sustain have over the recent past installed both solar panels and an air source heat pump system. We are absolutely delighted with the products and the service received. With regard to the air source heat pump project nothing was too much trouble. Glenn, Richard, Alex, Ollie, Will ,Adam, Daniel and Tony went above and beyond what might be expected. When a glitch was discovered Glenn stayed until 9pm to sort it out successfully despite facing a drive in excess of one hour to get home. After installation head office support has been readily and cheerfully available. When we were investigating this project, Wayne, Peter and the ever cheerful Geraldine were very helpful! We recommend this company without reservation!

The design and discussion of my PV system with Peter, the installation by Daniel and Scott through to the commissioning by Will has happened without any problem, damage or issue. A long discussion of my requirements and a detailed Q&A session led to agreeing an 18 panel system spread over two roofs with external batteries and inverter. The price was agreed, the date set and the system was installed over three days, as planned. Their attention to detail placed the panels centrally on the roofs so they look as good as they can and the electrical cabling and various boxes installed with a minimum of fuss. We are pleased with our PV system, believe it was value for money and feel it was a much easier process than we expected. I have no hesitation in recommending Sustain and should add an addendum to this review in a year's time to reflect on whether the performance reaches our expectations. For info: we have a 1954 detached house

Sustain Heating did an amazing job fitting the Air source heat pumps, replacing the old radiators with new efficient ones, removing the old gas boiler. It wasn’t an easy job in my stone-built 400 year old house on 4 floors, and they dealt with the unexpected problems with ease. They were great communicators and it was a really positive experience having them do this very complex installation

I was particularly concerned about installing an ASHP as there are many horror stories and much misinformation flying around. I met Sustain Heating at the Malvern Show and was encouraged by their approach and knowledge. We had quite a few visits from Sustain prior to the installation to ensure everything was in order. I was particularly impressed with the manner in which they ensured we were aware of all the safeguards and processes they have in place to ensure that the system is reliable and efficient. The installation proved a challenge but at no time did I feel that the guys didn't have a grip on it. They kept me informed throughout the process. What I found encouraging was that all their fitters, none of whom were sub-contact, were fully trained and were able to answer all my queries. The system is up and running and, although early days, I am happy with the outcome. I have been particularly impressed with the manner in which my subsequent queries have been dealt with. I have no hesitation in recommending this company.

We have waited a year before writing this review. We had solar panels and battery fitted and have been delighted with the performance of the system. Saved hundreds of pounds in the first year. Dealing with Sustain was a painless experience. The initial meeting with Peter was informative and all of my wife's extensive(!) questions were dealt with. The scaffolding was put up without fuss. We did have to push for it to be taken down (3 weeks after installation). A minor hassle. The guys who installed the panels were heroes! Torrential rain, but they stuck at it. Done in a day. The inverter was installed and set up two days later, along with the boost for the water tank. Neat and tidy. Up and running in less than a week! Very pleased with any responses we have had to queries about the system, made us feel that we were being looked after. All in all I would not hesitate to recommend Sustain as an efficient and highly professional company

Sustain were contracted to replace our solid fuel system with a heat pump. We already had underfloor pipework, so this was basically disconnecting the solid fuel system and replacing it with a heat pump system. It included replacing an existing thermal store with a heat-pump cylinder and replacing the old underfloor manifold ( which was faulty) and then running pipework to connect up the new system. All was accomplished in 10 working days as had been predicted (it was quite a big job) and finished in an exemplary manner. On more than one occasion there were 3 vans on the drive with the Sustain guys working around each other. Of particular value was the fact that Sustain were happy to fit around our timing plans, which were complicated by an unexpected occurrence. I'd have no hesitation in recommending them, but since I found them through Which Trusted Traders, this doesn't surprise me.

When I reached out to Sustain in the summer of 23, I wanted solar on one side of the house. This proved difficult based on the roof layout so I cancelled the order. They convinced me using both sides would still give me the results I wanted. We went ahead with the 5.6kw system with panels dotted all over the roof and garage roof. I had a SMETS2 meter installed by Octopus Energy in January 24 and since then I haven't received an energy bill, instead they pay me (from Feb onwards). With the help of Sustain I have future proofed the house with very low or non existent electricity bills. The lads who installed the system were respectful of the property and did an excellent job. I couldn't be happier with my Enphase solar system.

Sustain did a total heating system conversion for us, replacing 2 gas boilers with a Grant ASHP and MyEnergi Libbi solar PV battery storage, including 2 EV charging points. Everything from initial consultation to to the installation and commissioning has been 5 star. The crews were incredibly professional and the work completed to a very high standard. Sustain were great at keeping us informed and even managed to complete the project ahead of schedule. I would highly recommend Sustain for all your renewable heating and energy needs.

Excellent company. Heat pumps, solar PV and solar thermal all installed professionally and competently. Very pleased that the heat loss survey was done prior to heat pump installation to ensure that the system will meet our heating needs.

I have no hesitation in recommending Sustain. They know what they are doing, helpful, quick to respond and professional. It's a big deal having a totally new system installed in to your home and they take you though it step by step, always ok with answering lots of questions. It's very new and they are still available for aftercare. Thank you Sustain

We recently decided to remove our 20 year old oil fired heating and hot water system and install an Air Sourced Heat pump. Researching which company to use is time consuming and at times confusing. We approached a total of 5 companies for a quote. All except Sustain gave us a figure down to the nearest pound, with either no visit to the house or a cursory sales pitch on site. Sustain stand out as the only company to insist on a comprehensive third party heat loss survey being carried out before designing a bespoke system, schedule of works and quotation. It was this systematic and logical approach, together with the approachability and professionalism of everyone involved that convinced us to go with Sustain. The resulting installation has been completed to an extremely high standard by a most friendly team who clearly know exactly what they are doing. There have been a few “snagging” issues but all have been satisfactorily resolved with the minimum of fuss. The heat pump warms the house beautifully and we have a plentiful supply of hot water. Sustain is an extremely well run company with a family feel. Not too big so that you are just a number but with just the right economy of scale. The company owner even visited himself to explain the schedules of works and was always on hand to help the system settle down. I cannot recommend Sustain highly enough and would strongly urge anyone thinking of installing a heat pump to use them.

I had Solar panels and a battery installed by Sustain. They were very good in sales information, giving me all the information that I needed to know and what differentiated them from their competition. I chose them over a rival and was not disappointed. The work was carried out over the two days as promised (although the scaffolding was left for over a week, apparently they contract out fitters). Been very happy since installation. Great customer's service, especially when I wanted to understand what was going on and how to calibrate it to my own needs.

Sustained Heating and Renewables installed my solar panels, batteries and inverter in July 2023. The detailed planning and discussion of options were thorough and informative, and I am confident we found the best possible solution for my situation. From then on Sustain handled the planning application and all the necessary prior to installation. The installation itself, was quick and very professional. Others have since commented on the thorough work done. Since the installation my electricity has cost virtually nothing, as the panels have delivered enough electricity for my needs and allowed me to export sufficient electricity to cover the standing charge in all but the darkest months (November to February). I can thoroughly recommend the company. Their quote was competitive (if not the absolutely cheapest), but what won me over was the long guarantees for the installation and the attention to detail during the planning process.

So very pleased we used Sustain Heating and Renewables for our solar upgrade. We had a false start with another company who turned out to be terrible, so started off nervous, but everyone we dealt with at Sustain were welcoming and reassuring. They took time to go through all our concerns and everything we wanted and translated it into a bespoke system. The team did a thorough and excellent job, including removing and disposing of the old system, meticulously patching and repairing the roof and installing new panels and batteries and all the electrical gubbins to make it work. The whole team were extremely professional and delightful to have around and they all clearly knew exactly what they were doing so were able to explain every step. All of them clearly took great pride in their work – a refreshing change from contractors simply following instructions. And Daniel was always at the end of the phone to answer any additional questions, and still is as we get used to the new system. We now have a top-class system that generates electricity even on a dull day, heats our water, charges our electric car and lets us control it all from an app on our phones. We would urge people to beware of inadequate companies hiding behind glossy brochures who turn out to be incompetent. Sustain Heating and Renewables are a fabulous small family business who have done an excellent job for us and we highly recommend them.

We chose Sustain for our heat pump because (a) we were delighted by their installation of solar panels for us and (b) they were the only local firm prepared to fit a Viessmann R290 pump, top-quality German engineering. The team fitting our system had just been trained by Viessmann. Although Sustain would have provided us with heaters, we chose to rent locally. We popped in almost daily and were most impressed by the care taken by the team, and at conclusion, the house was left spotless. After 8 days of no heat, it took 2-3 days to bring the house to a lovely temperature everywhere. Sustain's calculations of which radiators needed enhancing have proved spot-on. Hot water is plentiful and shower pressure excellent. We live in a dormer bungalow with low eaves, and we could have been better forewarned that this would mean a vast array of exposed pipes from the quite elegant tank enclosure. The pipes have now been beautifully covered by a local curtain firm, but are still accessible for service. The large and amazingly quiet pump is outside and we have planted trees on either side to encourage birds and butterflies. The system is controllable world-wide by an uncomplicated smart-phone App, and by thermostatic radiator valves. it's too early to comment on running costs, but as heat pumps are much more efficient than gas boilers, we expect significant annual savings, while doing our bit to save the planet for our grandchildren and yours. We highly recommend Sustain.