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Boilers supplied and installed by a Gas Safe Engineer.

What is a Combi Boiler?

Combi (or combination) boilers are the UK’s most popular type of boiler for gas central heating and domestic hot water. They are easy to install, simple to use and economical to run.

A combi boiler only heats water when a hot tap or shower is turned on, ensuring maximum efficiency. There is no need to find space for a water storage cylinder or have a tank in the loft. Hot water is delivered to your taps at mains pressure, so you can enjoy a powerful shower without the need for a pump.

Frequently asked questions about combi boilers

What are combi boilers?

A combi boiler provides central heating and hot water. It heats water instantaneously when a hot tap or shower is turned on.

Will I still need a separate hot water cylinder?

No, because a combi boiler provides heat for central heating and heats water for your taps on demand, there is no need for tanks in the loft or a hot water storage cylinder.

Do combi boilers provide good water pressure?

The water is fed from the mains so the water pressure is generally good. However, depending on heat output, the flow can be limited if other taps are running at the same time. If you have more than one bathroom, a system boiler might be a better option.

How can I prevent the hot water supply from my combi boiler from fluctuating?

Turning on more than one tap will reduce the flow of hot water. If the water is not hot enough you may need to turn the tap down in order to reduce the flow and increase the temperature.

Do all types of shower work with a combination boiler?

Most standard shower fittings are compatible with a combi boiler, but if you have a modern multi-jet shower the water demand may exceed that provided. Pump assisted power showers can only be installed with tank fed systems.

Are combi boilers economical to run?

Yes, because they only produce hot water when it is needed. Wide modulation ranges ensure smooth operation, fewer ignitions, greater reliability and lower fuel bills.

What sizes do gas combi boilers come in?

Baxi combi boilers are available in a range of outputs of 24-40 kW so they can meet hot water requirements for different property sizes. Your Gas Safe registered installer can determine the output you need by doing a site survey.

Can I get a combination boiler if I have LPG?

Yes, both the Baxi Neta-tec Combi GA and the Baxi Duo-tec Combi GA work with natural gas and LPG.

Can combi boilers be made even more efficient?

Linking a new Baxi combi boiler to a Multifit GasSaver will further increase fuel savings as it recovers the heat from the flue gases which would otherwise be wasted. This reduces annual consumption of gas used to heat hot water by up to 37%* compared to a standard SEDBUK 2005 90% A rated high efficiency boiler.

* Test conducted by independent scientific test house, TNO. Calculation based on an average householder’s consumption of 100 litres of hot water per day.

How much does a combi boiler cost?

Every installation is different so we recommend you obtain a quote from several Gas Safe registered installers when thinking about replacing your boiler.

Who can install a new combi boiler?

All gas work carried out in your home should be done by a Gas Safe registered engineer. The Gas Safe Register is the official list of gas engineers who are registered to work safely and legally on boilers, cookers, fires and all other gas appliances.
Gas work includes:

  • installing, repairing or servicing a gas boiler
  • installing or repairing a gas fire, gas cooker or hob

Your boiler should be serviced annually by a Gas Safe registered installer in order to check that it is operating safely and at peak efficiency. An annual service is also a requirement of your boiler’s warranty.

IDOGAS can provide servicing and support for all of our heating products, whether the product is in or out of warranty.

Here at ShelRhia [IDoGas] we only use the best products from leading manufacturers making sure you get the best boilers That’s why we use the three main Combi Boilers ‘Baxi’ Worcester Greenstar’ and Ideal Logic’ to help our customers benefit from energy efficient central heating solutions. With a long-established reputation for delivering high quality and reliable products, ShelRhia Ltd is a market leader in the North East, Supplying and installing Combi Boilers.

Designed to extract more heat from the fuel they use, our condensing boilers offer a superior level of efficiency. For example, Worcester’s Greenstar condensing boiler is more than 90%* efficient – in other words, it converts 90% of the fuel it consumes into heat. You will reduce your household’s energy consumption and therefore lower the cost of your heating bills.

For quality assurance and added peace of mind, all of our boiler installers are Gas Safe accredited. In addition, the heating systems we supply are all A-rated for their efficiency and have warranties of up to seven years.

We are committed to delivering the best possible service for our customers, and our team of skilled technicians have been professionally trained to ensure a quick, clean and convenient installation process.

We understand that every home is different and has its own unique needs when it comes to central heating systems, which is why we will work with you to find a solution that meets your particular requirements and budget. If you think that your home could benefit from a new boiler, why not contact our expert team today? Our installers work across Tyne and Wear, so you shouldn’t struggle to find a qualified technician operating in your local area

Do you have an Emergency? Call us now 0191 583 0073
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