Grant UK レビュー 

We had a Grant Vortex installed in August 2005 which, with minor repairs, served us well until it started leaking last year. It seemed prudent to replace it with the same model. I was a little disappointed that the size had changed slightly and that the pressure gauge was now buried in a position difficult for an elderly person to see ( the old one was on the panel and obvious).

When it was installed I remarked that the water was rather hot but was told it was because the boiler was new. Over the winter we had very hot radiators and the exhaust smelt oily, unlike the old boiler.

When the boiler cut out on a cold day in early April we called in the plumber who had installed it. I mentioned the hot running again and suggested something must be wrong with the thermostat. He reset the overheat and proposed we call Grants.

Grant's engineer came very quickly and seemed most competent. He told me that the boiler pump had been running in reverse and adjusted it, also replacing the thermostat for good measure.

It seems to me that either it was wrongly set from the factory, wrongly installed or wrongly commissioned. We had an overwarm house this winter, used extra oil and I don't suppose the boiler was unaffected by this.

All now seems to be OK.

I did report all this to Grant (20MAY26) but have not heard back from them. Overall an unsatisfactory experience.

New unit is extremely quiet and efficient

A very efficient and reliable piece of equipment.

Very happy with what appears to be a sound, efficient boiler product.

After having a third party install of the Aeronator3 we had a couple of small issues. Grant came out and sorted at their expense and time. Recently had first service, exceptional professionalism and quality of work. Huge thanks to Paul for sorting initially and to Tony for the amazing service. Will always use and would recommend without hesitation.

All good.
Product competitively priced, delivered punctually, & installed efficiently by an excellent installer, courteous & pleasant to deal with.

Installed a Grant boiler which developed a leak from the bottom left side after roughly a year. Disappointed with the warranty/support response as I felt the issue wasn’t handled properly. Boiler performed fine initially, but aftercare and customer support let the experience down

Experience is more with the plumber rather thsn your boiler

We were having issues from the Company that installed our original air source heat pump. So I contacted Grant UK. Their engineer came out and he was extremely polite and very helpful. Also whenever calling Grant they are brilliant to speak to with none of the irritating automated answering services. The engineer was due to arrive today qto fit a new air source heat pump. The appointments that were made with me were at times that suited me. The information that Grant gave me was amazing. They kept me well informed and did exactly as they said they would. Overall Grant UK are extremely reliable and very professional. I couldn’t have asked for a better customer experience. I found Grant UK to be an excellent Company who are caring and passionate about their customers. I have no hesitation in recommending them along with their products. First class service from a first class Company 10/10

Excellent company with one of the best & most reliable products available

The vortex external boiler is SO complicated to programme. I have read and reread the instructions over 100 times and I am still unable to programme it to my satisfaction. The CP4 booklet should be rewritten in SIMPLE sep by step instructions.

The boiler was an exact replacement for our original unit that had failed (after 13 years faithful service). The installation was, therefore, straightforward and timely.

I haven’t had the boiler very long so can’t evaluate reliability etc.
However, I am very pleased with the performance so far. It appears very efficient and quickly brings up the water temperature. Oil usage appears significantly better than my previous boiler.

Grant boiler working very well, we should have replaced old one years ago. Grant recommended installer was excellent. Home Heating did the install very efficiently.

The boiler is working well.

I had a new Grant Vortex condensing combi boiler installed by a Grant G1 registered engineer. After just 14 months, the base of the boiler filled with water.

The installer immediately pushed it to Grant as a warranty issue. Grant sent an engineer, who blamed the UK weather and suggested the condensate soakaway was saturated, despite the fact we live on sandy, free‑draining soil and have never had this issue with previous oil boilers.

I was then billed £150 for the visit.

I chose Grant and paid extra for a G1 installer specifically for the 10‑year warranty and peace of mind. Being told that normal UK weather caused the fault feels like a design flaw, not a customer responsibility. Very disappointing experience.

I asked for a boiler and heatpump service in November'25 and was told that I could not be given a date but to expect an engineer visit within about 3 months. The wait was explained that Grant Engineers were giving priority to repairs. I called today (19/3/26) to ask when to expect an engineer and was told that the earliest date they could give me was 10/6/26. Grant UK had my November inquiry but now as then they say their priority is still on repair work. In November, I did ask to change my inquiry to a repair to be told that this would make no difference! A service is different and would need a separate engineer visit.

We had a Grant heat pump system installed by a third party supplier November/December 2024. We have since October been trying to get a service plan in place to ensure our system remains within their warrranty. Despite several emails, each answered by telling us there is a 10-12 week lead time for servicing. We are still waiting. Not convinced our install is all it should be and the service by the manufacturers would be invaluble as it could clear up any problems we may have with the original install or our understanding of best practice. However, Grant UK are woeful at response or communication. We are now seriously regretting getting a Grant heat pump and boiler system.

A superb service from the customer care to the high quality product and on time delivery. Making the whole process of purchasing a new eco friendly boiler very pleasurable.

My Mother's had one fitted nearly 12 months ago with a Government grant but sorry to say the back up service is terrible by smart energy who fitted it,the running costs are very high compared to the old gas boiler.