Heating Services Certas Energy Avis 

I have no problem with the engineer but they seriously overcharge for parts . They have charged me 104.38 before vat for a transformer which is available from reputable dealers for 35.93 before vat

This is the fist time we have had 'Certas Energy' service and repair our boiler, as apposed to just the supplied oil.
The service engineer - Jake Winter, came to service and repair, our 'Firebird" boiler! Jake was punctual, courteous and very professional.
I will be asking for him again, may the need arise.
Thank you 'Certas Energy' for helping us out, and please pass the warm sentiments onto to Jake, as he is a credit to your Company!!

Mark Armstrong arrived on time, did an excellent job servicing our boiler, including giving the cupboard a good Hoover. He was informative, friendly and very respectful of our home.

Great service. Nice chap. All we want.

Riki Urquhart arrived punctually and carried out a thorough service on our oil boiler, explaining many aspects along the way in a friendly manner.

Engineer Mark Armstrong arrived on time. He was already familiar with our boiler and immediately identified the issue and had spare parts to hand to effect a repair. Mark was diligent, friendly and obviously experienced with our type of boiler. I would not hesitate to ask Certas and Mark to attend to any future issues. Hopefully this will not now be the case.

Jake Winter from Certas has been servicing our boiler for years and has done so again Jan 6th 2026. Jake is time reliable, polite & courteous, informative and does a highly capable job, keeping our show on the road. We’ll see you next year, Jake 👏👏🙏🙏

I’ve been using Certas Energy for around three years now. The engineers I’ve had have been brilliant and very knowledgeable on the boilers

The prices are on the higher side, which is a shame, especially as my understanding is that this doesn’t reflect the engineers’ pay, which appears to be lower compared to other companies.

I will continue using them as long as my usual engineer remains with the company.

Mark A has been servicing our boiler since 2016. He is a highly experienced, competent, reliable and trustworthy engineer. Recommend him 100%

Gareth has serviced my boiler before. Always a pleasure. He’s affable, reliable, and gets the job done efficiently & promptly. Thank you.

Being in a disabled household we need a reliable boiler and only use certified engineers , that is why when we received an offer from Certas we decided to give them a chance as we use them for oil ,
Everything seemed ok at first with the exception that the Engineer who attended only took 30 mins to do a full service ,we then Received there Invoice and discovered they are charging a 500% mark up on a part fitted a Danfoss Burner Nozzle Which costs £6.50 we were charged £31, I have contacted Certas regarding this and even wrote to there Director Steve Little who unfortunately could not take the time to respond back to me , There response was that there pricing is part cost + a REASONABLE MARGIN so a 500% Markup is reasonable to Certas the £6.50 part i quoted as the cost price was a grey or unbranded part and it costs them more to store these parts ,maybe they tuck them in at night , But just to be crystal clear its the same genuine Danfoss nozzle that only costs £6.50 or less.
A markup of 500% is not reasonable.
The Company we were going to use before stupidly trying Certas were charging £12 for the same part .

There are plenty of heating engineers out there that charge a reasonable Markup on parts .

just a quick update I received a reply from Certas asking me to contact Dave at Customer care , this is a generated response to make it look like they care I have already contacted Dave the bot previously with no response , Certas have all the details required to contact me .

Our engineer Riki Urquhart is brilliant. Been to the home a number times. He's extremely knowledgeable, sits in the cold with the boilers and never complains. Would recommend certas energy 95 percent of the time.

Excellent service from skilled and friendly professional.

Mark has been servicing our aging boiler for many years and it has been completely trouble free. He is a highly capable and experienced engineer whom I would strongly recommend. In fact I would not like anyone else near my boiler!

Engineer Ronnie Brown very good and neat and tidy.

However the service was for my 88 year old mother who needed me to be with her at the service. She had left instructions for the engineer to call me before getting to her but this did not happen and she was very anxious when she called me to say the engineer had arrived. My details had not been updated to his PDA. I feel this needs to be addressed and the reason for the 4 stars. Ronnie himself was excellent.

Riki Urquhart did a great job. Professional and tidy. Certas has serviced my boiler for many years and their engineers are great

Mark strong, was super cheerful, helpful and efficient. 10/10 from me

Mark the engineer was very informative, professional and tidy.
His mannerisms with his apprentice was very good and he was explaining everything to him.
We would recommend Mark to any person requiring a boiler service.
Excellent service throughout.
Thank you very much. Allan Rudd

Thorough service by a knowledgeable engineer (Mark). Very pleasant and informative manner.

Very professional service, that gave me confidence that Mark did a good job