Grant UK Reviews 2,571

Early days with our heat pump but good so far. Pump itself is compact and very quiet. System seems efficient but yet to be tested in colder weather for the adequacy of the temperature. Installatio... See more

We need a new outdoor, wall hung oil boiler and Grant was recommended by both our bolier maintenance and heating engineer. We are extremely pleased with it. It is solidly constructed, feels and looks... See more

We have a Grant Air Source Heat Pump system that was installed about 11 months ago. A few days ago we suddenly had no heating so we contacted Grant, fully expecting them to tell us that there would... See more

New Grant oil boiler installed today by GD Davis. Gary and Jordan worked hard and it was done nearly and well in a day. Nice well made boiler replacing another Grant 16 years old that had smelt of ker... See more

New property with Grant underfloor heating and water system. Experiencing problems with hot water and having to reset the fan multiple times. Engaged plumbers and electrician who installed the system... See more

The true test of the quality of a company is what happens when something goes wrong. Giorgia in the customer service department was fabulous. From the outset and throughout she was responsive, highly... See more

Our engineer James was an absolute legend. His attention to detail is 100%. Something sadly missing in many facets of businesses. So far very happy with the boiler seems to be working efficiently. How... See more

The plumber who came to install the new boiler, recommended the make of boiler. As someone who knows very little about boilers all I can say is it is very quiet, works efficiently. Easy to use, heats... See more

I contacted Grant due to an issue with my parents boiler. Paul the Technical Support manager dealt with my request in a polite and quick timescale. Paul's knowledge allowed him to quickly identity t... See more

The product is working well since it’s been installed but I wanted to write a review on the customer service. There was a small post installation issue and I spoke to the Grant Customer Service team t... See more

Oliver and the team at Grant were extremely helpful and professional when our Grant air source heat pump developed a major fault. Rather than try to repair it, they sup[plied and fitted a brand new un... See more

Old boiler was well past its best, spoke to Craig, our local heating engineer whovrecommendedva Geant boiler as a replacement. Left it to him to supply and fit one, heating is greatly improved.

After a really poor experience with another company we used with a call out for a heat pump we contacted Grant UK and they sent out their engineer Alex. He came out and assessed the issue and advised... See more

Dean and michael were fantastic! They came to fix a recurring problem with my grant oil boiler and assessed the issues thoroughly, ordered replacement parts efficiently, and then performed a comprehen... See more

I recently had a Boiler installed by Swale / Sureserve. The Boiler is short cycling every 3 minutes, for the last 6 weeks I have been trying to get the installers Sureserve to fix the problem... See more

UPDATE: After leaving a negative review Grant UK contacted me within hours. I am extremely happy to say that they made a full refund of the parts we had already purchased without any unpleasantn... See more

Installation has only just been completed so it will remain to be seen how efficient or cost effective it will be - fingers crossed! But, the team working here, the plumbers, the electricians etc have... See more

Mid October, winter approaching and the heating would not come on. I contacted Grant and they commissioned my local heating engineer to come and check the boiler. Spare part sent out immediately and t... See more

Replaced the old oil boiler with a Grants Pro External Condensing Oil Boiler and have to say, what a great inprovement. Quieter, smaller, far more efficient and very easy to use. The ten year warranty... See more

ASHP - something went wrong with the installation with a recommended supplier. The unit makes a loud 200hz drone that penetrates neighbouring properties. The senior technical expert for Grant UK... See more

had an aerona 3 installed which has afault and hasnt worked at all. fault logged with the correct department chased after three days as no contact to arrange visit was told they were busy and that... See more

Have had our boiler less than 2 years and breaks down on average 3 times a year and their customer service is shockingly bad, I am still awaiting it to be looked at by them from breakdown in November... See more

I have a problem with heat pump communication issues and everyday I need to top up the pressure for the tank not yet solved yet, contacted installer and the Grant UK but still the same issues. ..wai... See more

The heat pump was installed in my house which is rented. The tenants tell me that it cannot heat the house any more than 19.5º. The engineer told them that it's because it's a big house - 4 bedrooms... See more

We have had the pleasure of knowing Carl and Ryan for some 10 years now and their work has always been exemplary, this installation was no exception their work was second to none. I would like to... See more

I had a fault with my heat pump. Georgia was so helpful and patient with me and organised a professional called Nial to visit. Nial fixed the problem with calm effiency. He very patiently explained wh... See more

I had excellent customer support from Jamie today, he talked me through exactly what to do in order to get my heat pump working most effectively and answered all my questions. We’re really happy wit... See more

Replacement for an older, but similar, version of the oil fired boiler. It appears to do the job better and more efficiently than the old and fits in the same space.

Boiler installation was 4 years ago. Still working fine but had to replace all 4 brass pump valves. Luckily I'm mechanically skilled or I would dread the call out cost

Very pleased with my new condensing boiler. Installation done in one day and it has additional features compared to with my 20 year old one. Still to see if it proves to be more efficient. Thanks

We had a boiler installed 5 years ago when we moved into our house, then it was revealed to us recently that it had a hole in it. Five years didn’t seem very long for a boiler. One year out of warrant... See more

Brand new Boiler started to be very noisy after a couple of months. 1. Grants engineer- fitters haven’t fitted it correctly. You need a new expansion tank. Fitters fit new on... See more

My husband installed vortex boiler house in May. We had a very old Worcester that had done it's time. Stripped of parts that were new to use with boiler house. Once installed and tuned in, it has been... See more

I'm afraid that this is a repeat of my review of July 2023 as our Grant PCB has just failed for the fourth time since January 2020 - on each occasion leaving us without heating and hot water for up to... See more

Paul from Grant technical diagnosed my issues promptly. Even sent me screen shots of what parts to order so the plumber could fix quickly, saving me money on labour. Excellent at what he does. Thanks... See more

We’ve just had a new Grant oil fired Combi boiler fitted . All I can say is it’s awesome!! lots of lovely hot water,great efficient heating . Saves room in the kitchen as it’s an external model.

Installed a 36kwh oil combi boiler around a month ago. Delighted with performance so far - instant hot water and appears very low oil consumption

So far so good! Had a grant outside boiler installed a few weeks ago - can already notice the difference with the warmth in the house. And having the boiler outside frees up so much space in our utili... See more

IMS were extremely professional throughout both the supply and fitting side of the project. We would highly recommend them both for initial advice and for the fitting of the pump.

Ordered the part over the phone and it was sent out by parcel force next day delivery before 10am. The part arrived 8 days later. Not a problem with Grant but with the company used for distribution. I... See more

I have a grant R290 9kw unit fitted with smart controller and room sensor.. so far it’s been excellent.. high performance, fast response, very effective.

I have rung Grant twice in the past and had brilliant service from their tech department but this morning was a different story the guy was very abrupt everything was a “no” he just couldn’t be bother... See more

Boiler wouldn’t work to start with , despite being brand new, however Grant sent out an engineer & was able to get it up & running

Happy with the boiler - not happy that there are so few approved installers in order to get a competitive quote for the installation. No complaints about the installer, just the lack of competition.

Excellent service very pleased with the new boiler the men talked us through each stage and madevery little mess thet deserve every accolaid

Had a new Grant Vortex Boiler 46/70 kw installed by ATP Heating Services. Good job. Quietly and efficiently done. Boiler working well.