Gas Heating Engineers & Plumber

North London



CALL 07951 521 281

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Thermostat Wars

Jeremy Vine Interview
BBC2 Radio with
David Butler


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Save up to 20% on the labour charge

Plumbing Services

Burst Pipes
Unblock Drains
Showers Installation
Toilet / Bathroom Repairs
Replacement Waste Disposal Units

Capitalboilers – your North London based Gas Safe Registered Heating and Boiler Engineers. We operate a 24-Hour Response to Boiler Breakdowns and Plumbing Emergencies – Trusted Heating Specialist – 1 Year Guarantee on our Work Call 07951 521 281


Gas Safe Reg No: 139826

All Capital Boilers Engineers are Gas Safe registered and carry ID Cards.

Do You Smell Gas?

Do You Suspect a Gas Leak?

Free: 0800 111 999


Free: 0800 371 787


  • Put out naked gas flames
  • Turn off the meter at the control valve
  • Open doors and windows
  • Keep people away from the affected area
  • Get medical help if you are feeling unwell


  • Smoke or strike matches
  • Turn electrical switches on or off

Switch Off Your Gas

Gas Valve on offFind the Isolation Valve at your meter. To turn off the valve simply pull or push the valve into a horizontal position, 90 Degrees to the valve

Services: Heating & Plumbing

Code of Practice: Turn up on Time - Work Professionally Codes of Building Practice - Customer Satisfaction

Gas Heating and Boiler Services

Heating Services

  • Fitting, Repair & Replacement of all Types of Boilers
  • Radiators and Thermostatic Radiator Valves
  • Pumps, all Valves and Central Heating Controls
  • Thermostats and Carbon Monoxide Controls
  • Tanks and Cylinders Replacements
  • Immersion Heater Fit/Replacements
  • Heat Exchangers
  • System Descaling, Cleaning and Power Flushing
  • Domestic Water Heaters, Gas Fires, Gas Cookers/Hobs
  • Gas Safety Inspection / Certificates

Boiler Types

  • High Efficiency Boiler (e.g. Condensing System Boiler)
  • High Performance Combi (e.g. Storage Combi Boiler)
  • Combination Boiler
  • System Boiler
  • Cast Iron Boiler
  • Floor Standing Boiler
  • Back Boiler
  • Forefront Boiler

Boiler Makes

Glow-worm Saurier Duval Ravenheat Valiant Viesmann Baxi Chaffoteaux & Maury Biasi Alpha Ferroli Vokera Potterton Main Ideal Halstead Valor Broag-Remeha Myson Worchester Ariston

Power-Flushing your Heating System Saves Money

Over time, sludge, rust and other corrosion build up up in your central heating system, clogging your radiators, pipes and boiler and causing noise, reduced efficiency and potentially boiler failure. By pumping cleansing agents around your entire central heating system, we can flush out ALL the corrosion and sludge – not just in the radiators and boiler, but in the pipework too, even in those impossible-to-reach places under the floorboards! – giving you lower heating bills, extending the life of your boiler and the rest of your system, and saving you money!

 Plumbing Services

  • Burst Pipes and Unblock Drains
  • Installation of all Types of Showers
  • Toilet/Bath/Sinks Repair/Replacement
  • Dripping Taps
  • Replacing taps (sink, basin or bath)
  • Replacing Ball Valves
  • Installation of Washing Machines
  • Waste Disposal Units
  • Installation of Dishwashers
  • Toilet Repairs and Overflows
  • Replacing Taps
  • Replacing a Bathroom Suite

Save up to £305 per Year by Upgrading your Boiler!

According to the Energy Savings Trust a new boilers have A-rated efficiencies of 90% or more meaning that they use less fuel, resulting in lower running costs and CO2 emissions. As boilers account for around 55 per cent of what you spend in a year on energy bills, upgrading from G-rated with no controls, to A-rated high-efficiency condensing boiler and full set of heating controls will significantly cut your home's CO2 emissions - AND could save you as much as £305 a year.

“Modern boilers are more efficient for several reasons, but their main advantage is that they are all condensing boilers. All well-maintained boilers burn their fuel very efficiently, but they inevitably loose some heat in the hot gases that escape up the flue. A Condensing Boiler has a bigger heat exchanger, so it recovers more heat, sends cooler gases up the flue and is more efficient.
Sometimes the flue gases get so cool that the water vapour in the gas condenses out (hence the name). When this happens, even more energy is recovered from the condensing vapour, and the efficiency gets higher still.” (Energy Savings Trust)

Gas Safety

Gas Safety | CO2 - Carbon Monoxide | What To Do

What is Carbon Monoxide?

“Carbon monoxide (CO) is a colourless, odourless, tasteless, poisonous gas produced by incomplete burning of carbon-based fuels, including gas, oil, wood and coal. Carbon-based fuels are safe to use. It is only when the fuel does not burn properly that excess CO is produced, which is poisonous. When CO enters the body, it prevents the blood from bringing oxygen to cells, tissues, and organs. “

What are the symptoms of Carbon Monoxide Poisoning ?

Early symptoms of carbon monoxide (CO) poisoning can mimic many common ailments and may easily be confused with food poisoning, viral infections, flu or simple tiredness. Symptoms to look out for include: – headaches or dizziness – breathlessness and tiredness – nausea and loss of consciousness – pains in the chest or stomach – erratic behaviour and/or visual problems

Gas Safety Checks - It's the Law

Home Owners - Landlords - Estate Agents - Property Managers Keep your properties Gas Safety Records up-to-date with attractive discounts from Capital Boilers. A Gas Safety Record (also known as Certificate) is a record, that is required by law to be held for all rental accommodation in the UK where there are gas appliances present. Gas Safety Regulations 1998 require all gas appliances in a rented property to be checked annually, complete a gas safety record and a copy provided to tenants.

Mobile App

Get your Android or iPhone App | Scan the QR Code

 Customers using the Capital Boilers App SAVE Money!*

First Job: 5% OFF Labour

Second Job: 10% OFF Labour

Third Job: 20% OFF Labour







Scan QR Code

*Note: The customer must be able to show the engineer the app installed on their phone for discount to be applied.


Trusted Gas Safe Heating Specialist All North London Postcodes | 07951 521 281

No Call-Out Fee Free Estimates You only pay for the work we do 1 Year Guarantee

We are

Capital Boilers is a Heating and Plumbing Service based in Turnpike Lane, North London. We pride ourselves in being a family-run business and offer a prompt, reliable, professional and friendly service. All our engineers are fully trained and qualified and we are Gas Safe registered (No: 139826).

We Do

Although we specialise in Heating Systems we also appreciate your call for the smaller plumbing jobs. We carry 80% of parts on our vans. But if we don’t have the part, we can get it within 24 hours – so you, the customer, do not have to wait in the cold.

Capitalboilers :  On Video and Radio


"Thermostat Wars" Jeremy Vine interviews David Butler

Jeremy Vine Show on BBC2 Radio 01/03/18 | CLICK TO LISTEN

Frequently Asked Questions

If we have not answered your question, call us on 07951 521 281

Do you have a call-out charge?

Quotations on new boilers and radiators usually (with few exceptions) do not carry a call-out charge and a price for the whole project is given to the customer. For repairs we charge a Diagnostics Charge of £75 which is credited back to the customer as the first hours labour when the repair is carried out (most repairs can be carried out within that first hour).

I need a new boiler. Do you charge me a call out to give me a quote on a new boiler?

No. If you need a new boiler fitted we are happy to come to you home and give you a FREE quote

I want a radiator fitted in my home. Will you charge me to have a look ?

No. We at Capital Boilers are happy to come to your home to give you a price on fitting only or supply and fit you new radiator for you.

Do you take the old boiler/radiators away or do I pay for that extra?

We always take your old boiler away for recycling at no extra cost and make good of any mess at the end of a job. However we do not box-in pipework unless specified at the the time of the quote.

If you repair my boiler and a month later it breaks down again will you charge me again?

No, there is no charge. Any work carried out by Capital Boilers is guarantee for 1 year which includes any parts fitted that were supplied by us.

If I call out Capital Boilers to come to my home to repair my boiler how are the charges broken down?

Capital Boilers always aim to repair your boiler as quickly as possible and our engineer will diagnose your fault as soon as he can and will charge £75 as well as tell you the cost of repair and if any parts are needed.

If Capital Boilers fitted my new boiler and after 3 months it brakes down do I call the manufacture or Capital Boilers?

We always recommend to call us first because it is quicker for you and we can get there the same day or the next. Once we have seen your new boiler our engineer will know if it is a manufacture repair or not and take the appropriate action.

What is an annual service and why do I need it done?

It is very important that you get your boiler serviced each year. All manufacturers and Gas Safe register advises that it should be done. A service ensures that your gas boiler is safe and working correctly. You may also find that your Home Insurance Company insists on a boiler service for your yearly cover – check your policy for details.

Can I buy the part myself and you fit it for me ?

Yes. You can buy your own parts, but we CAN NOT guarantee it for you and should you supply us with the wrong part a fitting payment will still be required.

I have been told my fan in the boiler is broken. Do I have to get the fan for you to fix it for me?

No. Please, don’t buy anything until an engineer has diagnosed why the fan is not working. Should it need a replacement fan we will supply it for you, with a 1 Year Guarantee.

Do you only fix/install boilers?

No. For a full listing of all our Heating and Plumbing Services please go to the menu and click on ‘Services’

My landlord asked me to call Capital Boilers to repair my boiler. Do you invoice him?

If your landlord is an account customer with us or we have been instructed by him to await your call, we will usually ask you for the payment and give you a receipt.

I smelled gas and called out Tranco (National Grid) who turn my gas off. They told me I MUST use a qualified gas engineer to repair the leak. Is this something Capital Boilers can do?

Yes. All our engineer are fully qualified and registered with Gas Safe to do this work for you. We will find the gas leak in your home and repair it safely. We also fit gas hobs, gas firers, gas cookers, gas water heaters and gas boilers.

Why is my hot water not as hot as it used to be?

You may find that you have a small problem with your boiler. There are a some tests that our engineer can carry out to identify any faults. If a fault is diagnosed he will tell you the cost and of course you will get a one year guarantee on the work.

Can you carry out testing and provide Landlords Gas Safety Certificates?

Yes, we can and discounts are available for 5 and 10 bookings for the same day. All you need to do is call us us on 07951 521 281 to book an engineer.

We are moving home to a new house. Can your company come and disconnect our cooker, washing machine and dishwasher as well as reinstall them in our new house?

Yes, we can. As we are in your new home we can also check your boiler for you and tell you how to use it safely.

I called out a plumber to fix my boiler and he told me that he doesn't do that job. I thought ALL plumbers fix boilers?

No, not all plumbers repair boilers. 90 % of plumbers only deal with the water side of plumbing (e.g toilet, sink, bath etc) and are often not ‘Gas Safe’ (previously Corgi) registered. Heating engineers like Capital Boilers can do the heating and the water side of any plumbing job.

Contact Us

24-Hour Contact


07951 521 281

Capital Boilers

10 Alfoxton Avenue

Turnpike Lane