We are a Guildford based heating company with an enviable reputation for high quality and superb customer service. With Gas Safe and G3 accreditation, we specialise in the installation and maintenance of Megaflo high performance pressurised hot water systems; see our dedicated Megaflo website at www.megaflo-unvented.co.uk.

Operating within a 20 mile radius, we offer a professional and reliable service to both domestic and light commercial customers.

Our aptitude and keen interest in the technicalities of heating systems, drive us to constantly innovate and improve. Always embracing new technology, we continuously strive to deliver the most advanced heating systems to all our customers.

Customer care, honesty and reliability are important to us. We work with integrity and professionalism. We consistently work to the best of our ability, ensuring we deliver exceptional workmanship at all times.

As a Gas Safe registered company, we offer competitive pricing for all domestic (new and replacement) boiler installations.

At Apex Plumbing and Heating, we know the only way to do a job, is to do it properly. We always:

  • Work to industry standards.
  • Invest in the best tools on the market.
  • Use quality components and fittings. (The parts customers don’t see or care about, but build the infrastructure to a reliable system!).

“Apex Plumbing and Heating are a company you can rely on…we’re different and we’re proud of it”.


Megaflo Unvented Installation

All of the plumbing and installation carried out by Nigel was excellent: Megaflo, Shower and Sink Unit.
Very professional, personal service and quality on time.

D.I. – Bracknell, Berks

Electric Megaflo Installation

We cannot thank Nigel enough for his reliable, efficient and professional service. We had fitted a new Megaflow boiler, a shower and sink unit with tiling and could not be more delighted with the results. Everywhere was cleaner after he had finished than before which takes the hassle out of upheaval! We would recommend him and his company to anyone.

C.J. – Grayshott, Hants

Woking – Megaflo Installation

Nigel from Megaflo Unvented was friendly, knowledgeable and professional from the start. Installation of the Megaflo unvented cylinder in our loft space was quick, went without a hitch and the cost was very competitive. Thank you!

Guy and Lauren – Woking, Surrey

Basingstoke – Megaflo/Boiler

New boiler and unvented hot water cylinder installed in garage, water softener in kitchen plus internet thermostat and new pipework. Plus removal of old boiler, hot water cylinder, old pipework and decommissioning of cold water tank in the loft. First-class job from start to finish – clear quote specifying the work to be undertaken and excellent installation. Nigel is a great communicator and replied promptly to any queries. Many people have commented on how good and tidy the installation is, including the pipework. Nigel really knows his stuff and can recommend the most suitable products for the job. He’s prepared to go the extra mile – none of the leading market internet thermostats functioned how I wanted them to; Nigel tracked down a relatively obscure one which exactly met my requirements.
He is totally trustworthy, delivers to the dates and it was a pleasure to deal with him.

L.P. – Basingstoke, Hants

Megaflo Installation – Ashford

My husband and I just wanted to say a big thank you to Nigel for installing our Megaflow. My husband had called a number of installers to quote for the job and we received various quotes and excuses as to why it would be a difficult job. Nigel came along put our minds at rest and gave us a very competitive quote. His work was meticulous and his whole attitude gave us confidence. A job very well done and we would highly recommend him.

R.B. – Ashford, Middlesex

Walton – Megaflo Unvented

We had Nigel install an unvented cylinder into our property. His approach to our questions, the installation and the project as a whole was extremely professional and of a very high standard. We have no hesitation in recommending Nigel and Apex Plumbing and Heating.

H.P. – Walton-on-Thames, Surrey

Megaflo Unvented Installation

Just wanted to say that your services were exceptional.
The kindness you showed me and especially my 89-year-old Mum while you explained all were very much appreciated. The new Megaflow is brilliant and poor Mum has had a stream of residents in her flat checking it out. I expect you will be very busy this year!
Can’t believe how much more space Mum now has after you moved all the excess pipework. Clean, efficient and professional; shame there aren’t more like you.
Thanks for everything.

L.S. – Camberley

Virginia Water – Megaflo Installation

The meticulous planning for my Megaflo conversion ensured the work proceeded smoothly and quickly. Disruption was kept to the absolute minimum and the excellent work was completed as scheduled. All work was of the highest possible standard with no mess and everything cleaned up properly and all rubbish removed. I would highly recommend Apex.

A.H. – Virginia Water

Horsham – Electric Megaflo

I recently had an unvented cylinder installed and am very happy with the overall service provided. Nigel Oh was exceptionally prompt in responding to emails and advising me with any queries I had. Would not hesitate in using or recommending this company in the future.

S.H. – Horsham, West Sussex

Megaflo Installation

Megaflo-unvented were recommended to me by the manufacturer and their confidence was entirely justified. My installation was clearly explained, competitively priced, promptly scheduled, reconfirmed just prior to start, professionally installed very neatly and cleanly and has performed flawlessly ever since. I am a very satisfied customer.

W.O. – Guildford, Surrey

Megaflo Unvented Installation

Nigel installed the Megaflow in a very professional manner leaving no mess at all. It was a nice change to meet somebody who knew what he was doing and was pleasant with it.
I have had no hesitation in recommending you to several people.
Thanks for everything.

A.A. – Camberley, Surrey

Shepperton – Megaflo/Boiler

Nigel was punctual and considerate.  His work is neat and logical.  He was tidy and polite.  We now have a fantastic heating and hot water system that was installed efficiently and works effectively.  We appreciate his advice and knowledge.  I would have no hesitation in recommending him to others.

J.P. – Shepperton, Surrey

Camberley – Unvented Installation

I have just had a new water cylinder and immersion heater fitted and want to say how delighted I am with the work carried out by Nigel of Apex Plumbing and Heating. I really appreciated the friendly and helpful advice. Nigel was always on time and left everything clean and tidy and the price was both reasonable and very fair. I felt nothing was too much trouble and that Nigel gives excellent customer service as standard and is a real professional.
I am genuinely happy to recommend Nigel and would not hesitate to use his firm again.

T.M. – Camberley, Surrey

Walton – Megaflo Installation

It was a pleasure to do business with Apex Plumbing and Heating.
All works were completed within budget and to a very high standard. A full explanation of the “megaflow system” was given and the installation was carried out in a very clean and tidy manner.
I would have no hesitation in recommending Apex Plumbing and Heating to any prospective client.

C.W. – Walton-on-Thames, Surrey

Weybridge – Megaflo/Bathroom

We were so happy after the recent installation of a Megaflow System by Nigel Oh of Apex Plumbing & Heating (please see previous testimonial) we invited Nigel back to install our main bathroom and en-suite shower room. We feel compelled to leave another testimonial for Nigel as he really has been excellent to deal with throughout and his work ethic & professionalism really are outstanding. Nigel went out of his way to help us a number of times and really worked with us during a difficult and stressful refurbishment programme. He has easily been the best person who did any work for us in our property – always diligent, honest, punctual & totally trustworthy. Nigel works hard to find solutions to problems and always takes the time to consider things properly. He is a wonderfully calm & patient person and a pleasure to have around. We would have absolutely no hesitation in recommending him to others.

H.G. – Weybridge, Surrey

Staines – Megaflo and Accumulator

We would not hesitate to recommend Apex for the installation of a Megaflo system.   All work was carried out to the highest standard of workmanship and completed in the period allocated and to budget estimate.  All stages of the work were discussed both prior to the work commencing and during installation and final commissioning.

As a retired engineer, used to doing most jobs myself, I had some misgivings about getting someone in to do the work but the installation required a competent specialist and my mind was immediately put at rest by the professionalism which Apex demonstrated.

A.B. – Staines-upon-Thames

Megaflo Unvented Installation

The megaflow system works just fine. Thanks for the quality job you have done. Water flows well in every place around our house in both single or multiple tap mode. No jumps in temperature when someone opens another tap whatsoever.
Overall – it works much better than vented cylinder system which I had before.

O.K. – Woking, Surrey

Megaflo Installation – Guildford

We had been given a guide price band for the installation of central heating and megaflo cylinder in a house that had never had central heating – and so began the hunt for an installer. We finally came upon Nigel and were impressed with his calm manner and thoughtful consideration of our plans. When his quotation came in at the lower end of our guide (some quotes came in well over!) we were delighted. The work was carried out entirely to our satisfaction and he was quick to respond to our request for adding a water softener. The house is now efficiently equipped for some considerable time and we have no hesitation whatsoever in recommending Nigel as being both professional and a real pleasure to deal with.

J.K. – Guildford, Surrey

Megaflo Unvented Installation

From the first phone call with Nigel, he gave me the confidence that he knew what he was talking about. This was followed up with a survey of my current hot water system and what I considered to be a competitive quote to carry out the upgrade to a Megaflo system.
The installation was professionally carried out in a neat and tidy manner. I would recommend his services.

M.N. – Crowthorne, Berks

West Horsley – Megaflo/Boiler

We chose Nigel to install our new Megaflo heating and hot water system because he impressed us with his knowledge and his calm, helpful demeanour. We definitely made the right decision. Nigel worked very neatly and professionally, did a great job of minimising dust and mess, and generally made the whole thing as easy and stress free as it could be. Our new system is fantastic and we are very happy with it.

S.B. – West Horsley, Surrey

Finchampstead – Megaflo and Accumulator

Nigel of Apex plumbing installed a Megaflow and accumulator in our loft, replacing our 1980’s gravity fed heating and hot water system. Very pleased with the engagement, the work and most of all the result! Excellent communications throughout, with so many options Nigel had the patience of a saint in helping us to both identify the right configuration for our needs but also to understand what we were getting and why, which built trust and peace of mind. Very neat and tidy job, and now loving our hot and powerful water.

C.H. – Finchampstead, Berks

Camberley – Megaflo Installation

I would also like to thank you for the professional service you provided in installing the new cylinder in a timely neat and tidy manner and at a fair and reasonable price that accorded precisely with the initial quotation you provided. It was a pleasure dealing with you and I would not hesitate to recommend Apex Plumbing and Heating.

G.K. – Camberley, Surrey

Farnham – Boiler/Megaflo

I would just like to say how glad we were to have chosen you to advise us and subsequently install our new boiler. On first meeting you, I was very impressed with your appearance and general warm and open manner. What particularly impressed us was the consideration you showed in dealing with the fact that between the entrance and the boiler installation was a new, very light coloured carpet. I certainly need not have worried at all on that score. We have had several disasters with some tradesmen in the past regarding dirty boots and a couldn’t care less attitude. We were taken with your quiet unassuming manner and that you just got on and did your work with no fuss. I think you are to be commended for the very slick and efficient way you approached the installation and whats more, keeping us up to date with progress. Controls and operation fully explained before leaving and the follow up phone call to ensure all was well, was a very nice touch. Excellent customer service in my book. Don’t look anywhere else if you need a new installation or your Megaflo serviced. Our grateful thanks for superb job and every good wish for the future.

L.H. – Farnham, Surrey

Sandhurst – Megaflo/Boiler

Nigel was the consummate professional always on time, tidy and work content never questionable. Installation of megaflow was extremely straight forward and this plus relocation of boiler and additional pipework was completed without any issues. I would have no hesitation in recommending Nigel to others and would use his services again without hesitation.

M.R. – Sandhurst, Berks

Guildford – Unvented Installation

As a single person tasked with sourcing a professional, honest, reliable plumber I found it quite a daunting and frustrating experience. Until Megaflo Unvented! Nigel quoted, supplied and fitted a new unvented system, answering my many questions knowledgeably and patiently. His workmanship was top class and reassuringly honest. Nigel worked hard, exceeding labour hours, yet honouring the original quoted price and proactively managing liaisons with Guildford borough council on my behalf. Cost, quality, and the end result far exceeded my expectations. Thank you so much!! If you need peace of mind, an excellent and efficient service, don’t hesitate to contact them.

S.T. – Guildford, Surrey

Long Ditton – Electric Megaflo

In the process of renovating our bathroom, we decided to replace the existing immersion heater by a Megaflo Eco DD 210. We also wanted to take the opportunity to remove the two water tanks sited in the loft. Apex Plumbing and Heating presented us with a detailed quotation, which we found to be fair. We were also very impressed by Nigel Oh’s knowledge and experience and therefore had no hesitation in appointing Apex to handle the project. As the Megaflo was too large to go through the bathroom door, it was decided that it should be brought in over the first floor flat roof, with access through the bathroom window. Not an easy task, but achieved with the minimum of hassle. The project required Nigel Oh to work two long days, the second of which was spent in the cramped conditions of the loft, removing the water tanks piece by piece, as they were too large to go through the trap-door. Apex carried out all the required tasks with maximum efficiency and exactly as specified. We were totally satisfied with the service provided and with the results. We would certainly use Apex again and would have no hesitation in recommending Apex to others.

P.D. – Long Ditton, Surrey

Electric Megaflo Installation – Hampshire

Electromax (Megaflo and Electric boiler) installed. Friendly and professional service with all work completed to a high standard. Good attention to detail and a first class installation. Thoroughly recommended.

C.W. – Cosham, Hants

Weybridge – Megaflo Installation

We found Nigel of Apex Heating and Plumbing through the Megaflow Unvented website when we needed advice on a new hot water system. It is very rare in this day and age to find a company who not only do what they promise, but who exceed your expectations. We can wholeheartedly say that Nigel from Apex Plumbing & Heating lives up to this statement. From first to last he has been outstanding with the installation of a new Megaflow system. Prompt, courteous, reliable, informative & helpful – a true gentleman and one of life’s nice people. His work ethic and attention to detail are second to none and we are very happy to have found him. We had no hesitation in giving him a set of keys to our property and have already asked him to quote for more works to our bathrooms. We would have no hesitation in recommending him to others.

H.G. – Weybridge, Surrey

Ewshot – Megaflo/Boiler Installation

In recent months we commissioned Apex Plumbing and Heating to install a new Megaflo system at our home. We were totally satisfied with the prompt, polite and professional service we received. We found their attitude in today’s unreliable world very reassuring and would not hesitate to recommend and to use their services again.

J.L. – Ewshot, Hants

Megaflo Unvented Installation

Nigel is a credit to the plumbing trade. His excellent knowledge enabled us to select the right product (Megaflo) for our property. His initial surveys, installation work and aftercare service have all been first class. I have no hesitation in recommending him.

D.K. – Surbiton, Surrey

Old Windsor – Megaflo Installation

We were more than satisfied with the quality of service received from Nigel Oh of Megaflo Unvented from the initial quotation through to the installation & commissioning of a Megaflo Hot Water Cylinder. Nigel’s attention to detail, at all stages, was exceptional and ensured that the installation & commissioning was accomplished in a thoroughly professional manner.
The end result is that we have a first class installation which is providing us with all that we wanted and we would have no hesitation in recommending Nigel and Megaflo Unvented for work of a similar nature.

P.B. – Old Windsor, Berks

Camberley – Megaflo Installation

Apex Plumbing and Heating were chosen by me to totally refurbish my bathroom and to replace my boiler. Simply to say that from planning and onset I found them to be very professional and extremely helpful. The final result is superb and I am delighted to recommend this company.

M.O. – Camberley, Surrey


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