Denner Heating and Plumbing

Second time I've used Denner Heating & Plumbing first was when the did a full house install and recently for a boiler service. The whole team are professional, polite and you can see that they care about doing a great job. Would highly recommend these guys. Thankyou

Jason done an exceptional service so thorough, tidy and professional , he is a credit to your company . I feel at last I have found a trustworthy company to carry out my gas fire and boiler services and repairs thankyou

Popped into their new office on the hope they could help solve a problem with our shower an engineer came out the same day. Unfortunately it wasn’t repairable but they were able to supply and fit a new shower unit and had us up and running quickly. They have restored our faith in good efficient service after falling foul to shoddy workmanship.

Absolutely fantastic service from a ultra professional outfit! Jason went the extra mile to complete the job to the very highest standard. I CAN fully recommend Denner Heating & Plumbing!! 11 out of 10!!!

Denner heating are a great company , fast to come when I had an issue with my boiler and radiators fixed withing 24 hrsin no time would highly recommended.

The Denner team have been great, to Jason coming and fixing to Ciaran with the customer service/email. Couldn’t ask for more will be using them again

I read some good reviews about Denner Heating & Plumbing, and they certainly lived up to their reputation👍

I Would definitely recommend this company. Quickly fixed my problem of a leak in my bathroom. The team were very professional and friendly from start to finish. They sent a plumber out quickly to fix my problem and job was done in no time thanks alot x

We called Denner Heating on Monday morning after being let done by our previous heating engineers, (we had reported a fault with our boiler 2 weeks earlier and twice they didn't call us back as they said they would). An appt was arranged for Thursday which was fine by us, but then 2 hours after the initial call they rang to say they could come straight away as they'd had a cancellation. The fault was sorted in less than an hour, Jason and his apprentice were very professional, got the job done and cleaned up after themselves. What more could you ask for?? We shall now be using Denner Heating for our servicing etc...

Bad attitude, avoid. Harrison is very unreasonable.

Very efficient service and pleasant staff

Perfect from the start to finish - prompt response to quote request for a new boiler, explained everything in advance, early installation - all done very proficiently. Really happy with the service.

Serviced the cottage boiler Monday... came on time professional polite tidy... highly recommended.

Service done very efficiently. Very pleasant Engineer.

From first phone call to completion of work, the service from Denner Heating was exceptional. The fault was diagnosed quickly and the repair was carried out without a fuss and all for a very reasonable fee.

My heating broke down and I contacted Denner heating and plumbing, an engineer attended within 4hrs and identified the problem. Parts were ordered and my heating was back working within 48hrs, excellent service. I can highly recommend Denner heating and plumbing.

Great service from the phone call to the works A**** Highly recommend

From start to finish a first class job

Yet again denner heating helped me out when I was stuck, could not rate highly enough and definitely recommend.

Annual boiler service completed with no hassle. Easy to book and good communication regarding arrival time on the day.

Very good service. Good communication from the start and the two people that came to do the initial survey and to do the work were very helpful. Seemed very genuine too, we were concerned that we would need a full new boiler but once looked at they were happy that it could be fixed, and would last, meaning it was a much smaller fee. No issues and will use Denners again.

Very good service highly recommend

Excellent service. Would highly recommend

Jake came out to my son’s regarding a problem with the shower but identified something wrong with the hot water tank. He was very friendly, polite and professional. Wouldn’t hesitate in recommending Denner heating.

Delighted to confirm Denner Heating & Plumbing, are very friendly and helpful and at very reasonable cost. Thanks.

Can’t speak highly enough of these guys. They went above and beyond, in lousy weather, to sort out our boiler. Tremendous all round, thoroughly recommended .

Can't fault Denner Heating & Plumbing, arrive when they say they will, clean, tidy workers and reasonable pricing. What's not to like?

Excellent service from the word go. Nice to be able to trust a firm who do what and when they say.

Excellent Service from start to finish, After trying to find a company to quote and replace our commercial boilers for nearly a year we found this company who responded to our enquiry quickly efficiently and then the installation even brought forward by 1 week as our boiled failed. The whole team were courteous and very professional and were very fair on pricing, all is just great for small business such as ours. Highly recommend this company and all of there team. Thank you very much.

This was a professional experience from the first phone call to the point where the plumber left having done an excellent job. Would recommend this business. Duncan

Fast, efficient ,knowledgeable,pleasant bunch of lads ,any work they have carried out for me has been first rate and with their insurance scheme you don’t have to find the money there and then would recommend

I’ve had various plumbers come out to do a job. Denner has fixed everyone’s mistakes 10/10. Thank you.

Very polite and helpful when they called to give me a quotation, it is only a pity that they do not offer a finance option, because new boilers are not cheap and it is a lot of money to lay out in one go. You do get the impression that they would do a good job.

The service we received was excellent and it we can't thank Jake and Callum for the speedy work. The problem was solved in 1 hour and we are delighted.

Denner has exceeded my expectations far more than any other company I have dealt with – from the very first phone call I made to them. The Office staff are exceptional: friendly and efficient. I had four Oil boilers that needed sorting and servicing and Jason had them all sorted in record time. So pleasing to have a company that I can rely on and trust.

Excellent service. Prompt and professional

Exceptionally good booking system Jason was the engineer very professional and explicit who carried out the job extremely well Thank you

Good professional service. Arrived when they said they would.

We had Jake Denner come out to our property to do a survey of what needs to be done after we had been badly let down by other people (independents) if we’d known then what we know now we would have engaged with this company in the first place , Jake did a thorough site survey with voice notes of what needed to be done very professional so although we have had a extremely good experience up to now we haven’t yet had the work done which starts this week. I will endeavour to update my review once works are completed but I am confident it will be done to a high standard. Thank you.

excellent service and a great professional job completed. I would highly recommend

Great company, helped me out when I was let down by another firm. Staff are hardworking and professional, would highly recommend.

Attended a plumber emergency promptly, was very polite and thorough and corrected the issue and explained all clearly. Definitely recommend.

So here's my story. I had my oil boiler serviced 4 months ago by another local company, you see the van everywhere, popular. I'd had that company out again following their 'service' as the boiler was struggling to start at times, anyway we get to the last few weeks and every time it's switched on the place stinks of hot soot, eye keeps sooting up and needing a clean for it to fire. Denner gets booked and were able to fit me in within a couple of days. Their oil expert comes to see me. The upshot is now, it's like I have a new boiler. Previous service had resulted in baffle plates put back in incorrectly and unsuitable burner nozzle used.... amongst other things. Ultimately , what I'm saying is, this company is top notch, professional and and their oil boiler chap knows his stuff. Dont hesitate, book them, because now it's running sweet as a nut

I recently moved into a house which, to say the least, has a few quirks in terms of the plumbing, electrics and the workmanship of previous trades. Enter Denner Plumbing & Heating — in the form of Callum, Lewis and Jason. Between them they installed a brand new gas combi boiler, resolved plumbing issues affecting the taps and washing machine, and identified and advised me on additional circuitry that had incorrectly found its way into the boiler’s fused spur. The difference has been transformative. What particularly impressed me was their methodical approach to troubleshooting legacy problems rather than simply carrying out the boiler installation and leaving the rest. They were professional, clear in their explanations, and thorough in ensuring everything was left working properly. All in all, an excellent job and a very reassuring experience.

10/10. Speed ,Response,Service,Communication, and Care. Could not recommend your company enough. You want a job doing well call them you will not be disappointed

Callum was brilliant and sorted my washing machine connects and helped me with setting my heating schedule

Speedy response to our enquiry. Professional and friendly home visit and gave us a clear quote and timescale for work to be carried out. The work was undertaken and completed on the agreed date. We are delighted with the quality of the work and the friendly, professional, helpful advice. All was left clean and tidy. Jake checked we were happy with everything before issuing final invoice. We would Highly Recommend .

Callum arrived and immediately started to get the job done, friendly and very proffessional. Had the job done quickly and very tidy. 5 star job. Will be the first port of call for any future problems.

Oil fired boiler . Good service

First class service, diagnosed and repaired on fist visit. THANKYOU to Lewis our repair man, highly recommend Denner Heating and Plumbing. Peter.

Very professional. Everything was completed on time and everyone was very helpful and polite. Would definitely recommend this company.

Prompt attention. Pleasant tradesman. Efficient job.

First contact with Denner heating &plumbing. Very efficient on advice. Arranged service this week worker's Very efficient and helpful with their advice.

Many thanks for promptly fixing a broken Zone valve.

Very happy with Jake and his team. Friendly professional and helpful. I would certainly recommend him, could not be more pleased.

I have live in Annan 20years in all that time I have had a lot of Tradesmen come to do jobs at my house, but never have I had such knowledgeable & competant as Lewis & Callum from Denner Heating, the fitting of my new boiler was excellent and the whole job from start to finish I was kept informed of the progress of the job, i cant recommend this comany enough, TOP CLASS

Two years ago Denner Heating replaced our outdated back boiler and tank with a new Worcester Bosch system and new radiators. This efficient system has reduced our heating bills dramatically. Their senior technician has just spent five hours carrying out the second annual service. We highly recommend this firm for their impressive technical skills, their prompt service and their pleasant staff.

A reliable & trustworthy company. Posted 1 day ago Jake & Jason, heating engineers from Denner heating did a wonderful job of fitting my new radiators last December ~ 2024 Very trustworthy, attentive, efficient & reliable. When my boiler broke down this New Year's Eve (2025) ~ I contacted Jake on New Year's day & Jason came on the 2nd of Jan. 2026 to assess the problem. Spare parts were ordered & my boiler was up & running a few days later. I felt safe in leaving spare keys for Jason to access my home ~ as I was working away. All my messages & emails between Jake & Jason were replied to timeously & any queries answered promptly. Verified reviewer Job location:

Great company. Very fast service and extremely reliable.

Excellent service, easy to book for oil boiler service. Engineer came on time & carried out the work to a good standard. Thk u

What an absolutely outstanding service. Oil central heating stopped working on 23rd Dec. Emergency call out was swift and quickly identified the issue. All required parts sourced (burner motor) and the repair carried out on Christmas Eve morning. Communications excellent throughout. I can highly recommend.

Excellent service visit. Local and reliable. Very happy to use again next year.

Thorough and professional service. Will use again in future.

So far we have only had quotes for work so can only review the visit we had. Jake was very helpful and friendly. Arrived on time and quote received same day. As no work has been carried out I cant comment further.

Could not have asked for a quicker service in a time of need. The team was very experienced and done a wonderful job. Thank you for your service.

My request for price and availability for a combi boiler service was dealt with promptly and professionally. Appointment booked and received updates of who would be coming and arrival time on the day. Jason completed the service to our satisfaction and obligingly took off his shoes. He gave us an update on what he had done and found (a clean boiler). He was friendly and we were impressed with how he went about his work. Would use again and recommend Denner Heating and Plumbing for their professional attitude start to finish.

Fast efficient would recommend

Great service, tidied up each day & kept me updated with progress

I was very pleased that Denner responded quickly to my call for a local plumber to deal with a suspected leak behind the toilet in my bathroom. Calum arrived at the appointed time and quickly located the leak after moving the toilet away from the wall. Fortunately it was only a small leak, caused by a perished rubber seal, and was soon repaired by substituting the seal with an improved version. Calum then replaced the toilet, checked for leaks and made sure the area was clean and dry. I was relieved that the leak had been fixed. If it had continued it could have caused some damage. I was happy with the service received and would call Denner if I have further plumbing problems.

First class advice and service. We had a failed boiler which wasn't worth repairing, not only were we given great advice on the replacement but offered different pricing options. The boiler was expertly fitted the next day ensuring we weren't left without hot water and heating. Honestly, the best service possible.

Can't believe how quick the response was from the day I posted my request for my boiler service to the day the job was completed. My boiler is now working perfectly. The engineers turned up on time as arranged and were very professional and courteous. I would highly recommend Denner heating for all your heating and plumbing requirements.

Delighted with the speedy response and how quickly our issue was sorted. Will definitely use again.

Cannot thank them enough! Tricky job managed so well. Everyone courteous and helpful.

Incredibly efficient and understanding and very respectful of my home

Jason attended promptly and very efficiently serviced my grant oil boiler. No mess at all. He also didn’t even mind me watching ( retired engineer) over his shoulder!

Excellent super fast friendly courteous the guys did a great job definitely recommend Denner Heating & Plumbing

I wanted to use local, suitable, and qualified Gas Safe engineers, to carry out a number of tasks in my new property. Contact from the beginning was great and I was able to be booked in at short notice. I was updated throughout on any changes, which within plumbing is something I fully expected. Arrived on the day booked, fully prepared for the agreed jobs. Polite and well presented, in company clothing, and a fully marked up van. The guys worked hard to complete the job to spec, leaving the work area clean and tidy, with professionalism and efficiency. For the items that needed it, I was helped to set up, and connect so that they could go, satisfied I knew how to operate the kit. Would highly recommend this firm and the tradesmen representing it. Thanks

Had Jason and callum fit our new boiler system. Couldn't fault them at all. Great work. And Jake replied without fail any question i had. Would highly recommend Denner heating and plumbing.

Arrived when they said they would nothing to much trouble

Highly Professional, friendly staff,reasonable price and fully satisfied with work

A very prompt and efficient response , impressive service. A lot to consider . Thank you

💯 pc great job

Excellent annual service, highly recommended.

Excellent service Two plumbers arrived to fix a leak as promised, after another local company failed to turn up They were pleasant, hard working, knowledgeable and competent Job done

Have used these guys for a second time, excellent service, communication, efficient and tidy! Last year had a full central heating installation and recently for gas safety checks...highly recommend!

Good couple of guys who came. Explained the issue, then showed me what was wrong with the boiler so I could see the issues. They then explained what needed to be done. Pleased with the service and would recommend

Arrived when said & done service & gas checks all good would use again.

Prompt and reliable in organising and giving a quote for new boiler.

Excellent quick and fantastic service

Excellent. Fast. And Efficient. And very friendly. Guys.

Friendly staff.... good workers.... great result

The service was excellent being polite and punctual from the initial contact to installation of our new boiler. We were most impressed by Jake with his professionalism and clear no nonsense advice and his excellent team of installers.

Thank you Denner Heating and plumbing great service and fixing the boiler instead of trying to sell me a new one would highly recommend

Boiler service 28 01 2025 On time pleasant young man left everything tidy would recommend this firm 100% First time l have used but definitely in future Boiler running much quieter

My boiler gave up the ghost in mid December 2022 leaving me with the prospect of no heating or hot water over Xmas. Denner Heating managed to find time during a busy period to renew boiler the week before Xmas. I had them back Dec 223 for service and will be contacting them again to organise this year's. Very pleased with service given.

Excellent service. I was finding it hard to get a reliable company to come and service our combi boiler, always putting us off excuses etc Phoned Denner Heating and Plumbing not knowing if they covered this area, lucky for me they did! When phone up very nice, easy to talk to and gave me a price for my service there and then and also got a date and time for my service. The service engineere who was out, very nice person, he was easy to talked to and let you know everything they were going to do. Save to say going to be using this company again! Very professional.

Great service

What can I say, Jake and his team were fantastic, fitted a new heating system (Boiler, H/W tank and associated ancillaries). Jake turned up as arranged, provided me with an itemized quote within a few days and started on the date agreed, (unlike a couple of heating engineers from Dumfries who never provided quotes despite chasing them via phone calls etc..). Tidied up the rats nest of pipes with the end result being an extremely orgainised and now spacious area and a more efficient heating system. If you don't want an unreliable heating engineer go straight to Denner Heating & Plumbing you won't be disappointed..

Fantastic service as always, highly recommend. Knowledgeable, professional and accommodating for my budget when it came to our new heating system.

Oil boiler service in my mum's house in Carlisle. Engineer was very thorough, tidy and punctual. Highly recommended.

Amazing service, came when expected and were able to diagnose and fix the boiler very quickly. The team went out of there way to make sure my parents boiler was safe and worked after being seriously let down and left in a dangerous and cold house by a local company, we would never go anywhere else. Professional, brilliant service and excellent customer care. Thank you

Jake and his team fitted a new boiler for my dad and had to change the spec of the installation in short order when a few problems arose. The are all very professional and diligent in the work they do and Jake goes an extra mile in explaining issues. They were also very patient with my vulnerable dad. Can't recommend them enough!

I had a new boiler and complete new central heating system installed in my home. I would heartily recommend Jake and his team. They were reliable, turning up when arranged, and always very pleasant to deal with. Sheena Hawkins

One of the best company in our area . Prices are fair and the work Jake and his team made was quality . I will definitely recommend them to anyone

Have used Denner on a few occasions now and the quality of service is always top notch at reasonable prices. Would definitely recommend

Very pleased with new heating system the lads were very pleasant and went the extra mile to make sure you were happy with everything

I emailed this firm as I thought it would be handy and explained I needed 2 small plumbing jobs doing. My husband has tried to fix them but he's in his seventys as we both are and he's not the best at DIY so searching for a plumber who hopefully won't rip you off. I got in touch but they didn't even reply. Can't get reliable people these days.

Absolutely fantastic. Brilliant job of our bathroom. Really pleased with it and highest standard of workmanship. Highly recommended

Very,very good response and job well done with really professional tradesmen. Highly recommend!

Really great company. We had a difficult bathroom and boiler to replace and Denner Heating and plumbing took the job on without hesitation. They completed the job quickly and did an excellent job. I would definitely get these boys in again if I required anything else.

Very happy with the quality of service I have received from Jake and his team. Needed to replace old radiators in the house along with new kitchen sink and outside tap. Jake was happy to arrange for the old radiators to come off in early July which allowed me to organise painting and decorating while they were off the wall. They then came back out in a timely manner afterwards to install the new radiators along with thicker piping. They were also happy to accommodate my request on the day to move the location of one of the radiators despite the challenges involved. Overall very happy with the quality of the work and will be happy to use Jake and his team again for any future plumbing needs.

Excellent service. Responded quickly and phoned me back - other companies often ignore messages, so thank you. Organised date and time and didnt let me down. Efficient and professional repairs to bathroom and boiler service.

Great job done! The boys did a great job installing my new oil fired heating system! Neat,tidy and nothing too much trouble! Well done!

After a request on a local FB page, Jake contacted me & said he could have someone there within 45mins ( & they were 😁 ) Friendly & professional, would definitely use Denner Heating and Plumbing again & would have no hesitation recommending them to anyone

Jake and his team installed our boiler …(VERY neatly into a tricky position.) Fitted our bathroom and downstairs toilet with care and diligence. AND were conscientiously swift, professional and determined in addressing an unusual problem with our thermostat. Friendly, professional and delivering work of a high standard. Altogether excellent.

Very impressed with Jake Denner and would highly recommend. He came out to fix our leaky radiator really quickly and did a great job. Place left neat and tidy too. Second time using him and would always be my first choice!

Needed a plumber due to a radiator valve leak, phoned Jake who was flat out with jobs but still managed to send a plumber round and stopped the leak very quickly , can’t recommend the quality of service from this local Plumber enough . Thanks again Denner Plumbing 👏👏👏👏

Contacted Denner Heating and Plumbing for new Oil Boiler installation. Jake arrived next day to review requirements. Impressive response! Everything went smoothly shortly afterwards when Daz and Lewis fitted the new boiler. Professional from start to finish. Would highly recommend and will use again for future work.

Old back boiler system and water tank removed and replaced with new glo worm boiler these men fitted us in at very short notice due to having no heating in our family home great job friendly staff cant thank or recommend them enough excellent all round 👍

Replaced back boiler with new combi heating system brilliant job done by jake Darren and Lewis and left clean and tidy thanks madeline ward

Highly recommended

Great service. High quality materials used and very talented plumber. I would highly recommend. Very trustworthy

Jake was so professional he turned up when he said he would, he gave us a date to do the job, came fitted our free standing bath tap , bath our sink unit and our toilet, a wonderful job all done quickly no mess we are so pleased and a very reasonable price for the job. Would highly recommend him to everyone.