Project Description

Ideal Logic Combi Installation

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People often need a boiler system to be relocated. And this often occurs when the old boiler has reached the end of its life and prompted them to decide to take the plunge and move things around. What we love about our work is that every job is different.

For this project, our customer had several requirements. They were seeking to move their whole system out of the utility room and into the garage. They were also keen to convert from a gravity fed (open vented) system, to a pressurized combi system. This project had a few interesting characteristics:

  • We could use the existing 22mm gas supply in the garage.

  • However, the garage had not been used to accommodate a boiler before.

  • The incoming electrical cable was close to where the new boiler needed to go.

Why did they choose Grand Union Plumbing & Heating?

We have a great team of gas safe registered engineers and they therefore know the right questions to ask. This enabled us to gather the necessary information in advance of providing an accurate quote. We also have the necessary skills to remove and then refit kitchen units… as you will see.

What was our new boiler replacement process for this project?

The original boiler system was located in the utility room – surrounded by cupboards etc. This meant we needed to remove the units and fridge (also located in the utility room) so we could access and relocate the pipes. We then had to put everything back. Which we did, and no one would have ever known!

As mentioned, we were able to use the existing 22mm gas supply to supply the new boiler’s 30kw output, which was great. However, a new flue had to be drilled to the exterior facing side of the property. Unfortunately, the incoming electrical cable was very close to the new boiler location. Thus we had to be extremely careful not to hit it whilst drilling the new flue hole. The good news is we’re all still in one piece, so that went without a glitch.

We also fitted a system filter and scale reducer, because the property was in a hard water area. And we installed a new Hive smart thermostat/programmer, added inhibitor back into the system, and bled the radiators. We then commissioned the system and registered the new boiler with the manufacturer.

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Before Boiler was InstalledBoiler Installed in Garage

The benefits of our solution

Projects like these require quite a mix of knowledge and skills. Our gas safe registered engineers know all about heating, but they’re also pretty handy moving and fitting things like kitchen units too; which meant we could restore the utility room back to its fully glory at the end of the project. Also, because we were fully aware of the incoming utility supplies to the property, there was no interruption to the electrical supply.

We like to ensure that new systems have the best opportunity to run efficiently, so we made sure that inhibitor was introduced to prolong its lifespan and keep utility bills down in the future.

Plus we chose a combi system with a 7 year warranty, which we believe is very important.

In a nutshell:

  • Our team of gas safe registered engineers have a wealth of knowledge and experience… beyond just heating.

  • We were able to relocate the flow and return pipes without affecting the cupboard layout in the utility room.

  • We chose a great system with a 7 year warranty and registered the boiler with the manufacturer.

After care

It is our policy to ensure there is a full handover whenever we install a new boiler. Thus we:

  • Explained the differences between the old system and the new one.

  • Took our customer through how it works.

  • Demonstrated how to set heating and water timing.

We also took the old boiler and all packaging away to be disposed of in an environmentally friendly way.

Did we go the extra mile?

We most certainly did! Those utility cupboard units needed careful dismantling to ensure when they were refitted they  looked as good as new… and they did.

Does your boiler need replacing?

If you’re looking to replace your existing traditional boiler with a new combi system, please don’t hesitate to give us a ring on 01908 034194.  We love working on making these changes so customers can enjoy the best heating system for their needs.

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Areas we cover

  • Aylesbury
  • Bedford
  • Leighton Buzzard
  • Northampton
  • Olney
  • Towcester
  • Woburn Sands
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What Our Customers Say

I’ve used Grand Union 3 times and every time the service is excellent and the price very reasonable. Engineers are very good at letting you know what they are doing and there are no hidden charges. They even managed to do a job at short notice. They work tidily and even followed up with a message to check my heating was still ok the following day. Highly recommend

Claire Edwards

Excellent service from Mitch!
Responsive, courteous and informative.
Work swiftly done too, with clear explanations throughout.
Thanks again, Mitch.

Used grand Union plumbing to service my boiler and couldn’t of asked for a better service. They were on time and actioned the job in a clean and professional manner. Very nice to see they were operating in a covid secure manner without being promoted too

100% will be used again in the future

Tom Holland
Highly recommend Grand Union Plumbing & Heating. We called Mitch after getting nowhere with the first 2 heating engineers we contacted. In contrast to them, Mitch quickly diagnosed the fault, ordered the part and replaced. Totally professional and good value for money.
Mike Kennedy
I found Grand Union on local heroes. Id given up on British gas and NPower/homeserve.
Mitch was honest from the get go. Came round and gave me quote got the worl done within a couple of days once parts came.
Very highly professional. Very friendly. Perfect on time. Clean. Safe. What else can I say. I will be using only Grand Union here on and cannot recommend enough.
Amazing service Mitch Andy and Cory all amazing guys came out Xmas Eve went above and beyond to get me sorted and were amazing with my children letting them watch and so polite couldn’t recommend highly enough 10/10
Steaves Jen
Highly recommend the team to fix any plumbing or heating issues. They arrived as scheduled and it was great to have such a high standard of service. Will definitely be my contact for anymore plumbing issues and for boiler services.
Owen Thomas
Contacted them after having three boiler services being cancelled by a Big Five company only resulting to a wait till May for the 4th appointment. From the first day I contacted them Andy came around in a week’s time and provided excellent customer service and serviced our boiler very efficiently and quickly. The appointment ran a bit late due to another emergency call but both Mitch and Andy were apologetic and polite. Appreciate there excellent customer service on top of a job done well. Will be calling on them in future again for sure. Thank you.
Kaanita Khan
Would highly recommend Grand Union plumbing, really knowledgeable team. They were able to identify the problem with our heating pressure gauge, and release valve really quickly and stop our leak straight away. Thanks
Emma Thompson
Love these guys, have been using them for years and will keep using them for years in the future. They’re helpful, do amazing work each and every time, and are respectful of your home, both Andy and Cory took their shoes off when they came into the house recently, Cory put down dust sheets when he was fitting my new radiator in the bathroom (tiled floor wipes clean, but still put it down).
100% recommend them for any and all plumbing works and looking forward to having them do more work for me later in the year.
Ian Kockelbergh

It’s not very often that you find a quality tradesperson who is reliable, honest, and competitive on his pricing. Mitch has done a number of jobs in our house, including installing a new boiler, water tank and radiators. All to a brilliant standard. I will happily recommend Mitch and Grand Union Plumbing!


I have called Mitch out twice since moving into our new house a month ago. Both times he has managed to fit in an appointment fairly quickly to resolve our issues. He has been professional and friendly, offering advice on other issues that I have seen. I would definitely recommend his services.

Simon Edwards

We have used Grand Union Plumbing several times as we had a really tricky fault. We found Mitch to be really excellent. Very happy to recommend, 10/10

Annette McDade

Called Mitch out on very short notice, extremely reliable and great rates, would highly recommend Grand Union Plumbing and Heating. Also provided advice with other queries aside from the job at hand- with no reluctance. Great service, thank you for your hard work and honesty Mitch.

Dushan Gnanakumar
Great service, polite, attention to detail. Would highly recommend.
Ajvinder Dhatt
Had a leak that needed fixing asap and Mitch gave me advice over the phone to deal with it until he could get to me, then came out within the hour on a weekend! Would highly recommend
Hannah Manners
Great company would highly recommend for any heating & plumbing issues
Terry Adolpho

Definitely recommend these guys. Had a job done by them and they wasted no time to get it done and made sure I was completely happy before any payments. Nowadays companies just want to rush and take your money. Big thumps up

Tevaugh Grant
We always use Grand Union for serving and any other unforseen problems. The service and professionalism is 1st class. Would definitely recommend!!
Stephanie Horne
A great company to do business with… I used them recently for an emergency with a domestic heating system which was rectified very efficiently. A second problem (some months later) and there was no decision to make, called them and they sorted it in no time with minimum fuss, mess and very reasonably priced.
Trevor Gordon

Have used Grand Union twice now. They are very quick to respond to enquiries, reasonably priced, tidy workers and very friendly. I can’t fault them. Definitely my go to guys now for any plumbing needs.
Highly recommended

Emma Verrall
Great service from Mitch. Have used a few times for boiler service, repairs and outdoor tap installation. Always very prompt service, turns up on time and reasonable prices. Would definitely recommend!
Jon Hood

I found Grand Union Plumbing through the Gas Safe Register. I had a boiler service and gas safety certificate. Mitchell was very professional and the prices were very reasonable. I would definitely recommend and use again.

Rebecca Hughes
Mitch was very helpful when fitting my new boiler – he was very fair about price and I couldn’t recommend Mitch enough. Thanks Mitch!
Reece Hussain


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