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O'Neil Gas Services Limited

Na h-Eileanan Siar

MCS Certified
MCS
Certified Installer
32
Counties Covered
2
Technologies
4.5
Google (290 reviews)

MCS certificate IAA-10162 · Verify on MCS

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Technologies

Solar PVHeat Pumps

Reviews

4.5(290 Google reviews)

What customers say on

5/5

This morning we had the pleasure of having our boiler serviced by O'Neil Gas and Heating, they sent an engineer who arrived on time and introduced himself as Alistair. All I can say is it was a pleasure to have him here completing a service and installing a Hive Thermostat. Alistair is a great representative of your business cannot praise him enough.

Steve Search16 Jan 2026
5/5

Boiler was fitted efficiently and well, and looks neat and powers the warm water and heating well. Gas engineer was friendly and the check up phone call a week later was appreciated. Thank you.

Nicole17 Jan 2026
5/5

We recently had our gas boiler replaced by O’Neil Gas and Plumbing Services (Ayr), we received a great service and assistance delivering and installing our new boiler. Their installation Engineer Matthew was first class, he was very helpful and knowledgable completing the removal and installation in one day. regards R.Kerr (Ayr)

Rodger Kerr11 Dec 2025
5/5

This is to say “thank you, John” for being so friendly and helpful and patient and professional when helping us to get to know our new boiler and its hive and ensuring that our central heating system works efficiently. A really good experience!

Kupfer14 Jan 2026
5/5

We are an elderly couple . Our boiler needed parts and was dealt with efficiently and quickly so that we were not without heating and hot water any longer than need be while they got the parts . Staff on the phone are polite and very helpful . Been with this company for a few years now and would recommend them.

janice osborne24 Oct 2025

What customers say on Trustpilot

5/5

Recently moved into a new house

Recently moved into a new house. I chose O’Neils from two personal recommendations. They came out for a radiator leak which they were unable to fix due to the age of the radiator. The Engineer made sure the radiator was drained and off to allow me to still use my heating. The quote to supply and fit was reasonable. I also got them to put in a new boiler. The engineer who attended for the leak also provided the quote. He was really clear and discussed the boiler options with me which I found really good as sometimes being a female I have been talked down to at times. The installing Engineer (Glen) did both the radiator and boiler. He was efficient, tidy and helpful. He made sure any questions I had were answered in full before he left but made it clear I could phone if I had any questions he also set up my Hive thermostat system ensuring it was working properly and that I was connected via the app. The old boiler was taken away before he left the house and the place was left near and tidy. The office staff (Tammie) was really helpful and I received a follow up call after the work had been done to make sure all was ok. I have been in the office and all the ladies are really nice and friendly and helpful. The engineer attended really quickly for the leak and the new boiler/radiator fitting was booked on the Monday for the Thursday of the same week. (Unlike the previous time I had a boiler fitted which took six weeks to be done!)

Mairhi Mowbray26 Feb 2026
5/5

First Class from start to finish

We have been a customer for years and between Christmas and New Year our gas boiler gave up on us, thankfully the whole episode was made so easy by the staff of O’Neil’s and a new boiler was ordered and fitted as soon as it was possible. Tammie in the office was so understanding and helpful and Glen the engineer had the work all done and cleaned up in the same day. A credit to the company and with the brilliant attitude and professionalism we were shown. I thank everyone concerned and would recommend the company, although I hope it will be a while until I need to call again. Many thanks once again.

Gary McLaughlin11 Jan 2026
5/5

Excellent service boiler fitted…

Excellent service boiler fitted standard of work exceptional. Fitter respectful and very efficient

Helen21 Aug 2025
1/5

Left for months with no heating or hot…

Left for months with no heating or hot water. Initial repair booked, took over a week for the needed part to arrive and then the repair failed, had to chase for the promised refund. Agreed to a complete replacement, took a further 2 weeks for someone to come out and survey for the quote. Then I chased the quote over 4 weeks, kept getting pawned off about someone waiting to hear back from a manager. I stopped chasing eventually and just never heard back from them again. Complete waste of time and money.

Gary Kane29 Apr 2025
1/5

Three weeks of no heat or hot water, and no refund after failing to fix boiler

When our Worcester boiler failed we contacted O’Neil’s. Someone came out quickly and diagnosed a failed gas valve. That was on a Wednesday. I chased up on Friday to find out what the score was, and it was arranged for fitting on the following Tuesday. I took time off work, only for the fitter to arrive with the wrong valve. Then a subsequent visit and another wrong valve. The fourth guy came out with the correct valve, but found that the wiring harness was failed. The fifth guy came out with the wrong harness. By this point I’d arranged with a different Gas Fitter to supply and fit a new boiler. O’Neil left us with no heating or hot water for three weeks during the cold snap in November’24. They have you pay in advance, but then when they fail to fix the job refuse to refund you claiming that you’ve paid to replace a valve, and that’s what they’ve done. Avoid at all costs!

Anthony King2 Apr 2025
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FAQs About O'Neil Gas Services Limited

Is O'Neil Gas Services Limited MCS certified?

Yes. O'Neil Gas Services Limited is registered under the Microgeneration Certification Scheme (MCS) (certificate number IAA-10162). MCS certification is required for your installation to qualify for the Smart Export Guarantee (SEG) and confirms the work meets recognised UK standards for safety and quality.

What areas does O'Neil Gas Services Limited cover?

O'Neil Gas Services Limited serves Na h-Eileanan Siar and 31 other counties across the UK. You can see the full list of counties covered on this profile.

What does O'Neil Gas Services Limited install?

O'Neil Gas Services Limited installs Solar PV, Heat Pumps. Every project should include a free survey, a detailed written quote, and installation by MCS-certified engineers.

How is O'Neil Gas Services Limited rated?

O'Neil Gas Services Limited holds a Google rating of 4.5 out of 5 from 290 reviews. You can read reviews and compare against other installers in Na h-Eileanan Siar on this page.

How much do solar panels cost in Na h-Eileanan Siar?

A typical 4kW domestic solar PV system in the UK costs around £6,600 to £8,500 installed, with a payback period of roughly 11 to 13 years. Your exact price depends on system size, roof type, and whether you add battery storage. Compare quotes from installers covering Na h-Eileanan Siar to get accurate figures for your home.

Does O'Neil Gas Services Limited install heat pumps?

Yes. O'Neil Gas Services Limited installs air source heat pumps in Na h-Eileanan Siar. A typical air source heat pump installation costs around £8,000 to £14,000 before any grant. In England and Wales the Boiler Upgrade Scheme offers a £7,500 grant towards the cost, which an MCS-certified installer can apply on your behalf.

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