Can't decide which system is right for you? Getting confused? Hopefully this page will help you to decide. Combi or Conventional?

The answer might not be as simple as it sounds. You have to bear in mind that with the combi boiler the hot water is being heated instantly on demand. If you have a large property and the most used areas of the house (in terms of hot water usage of course) are far from each other and the location of the boiler is also far from them than probably it is not a good idea to install a combi boiler. There are a lot more factors to be taken under consideration when thinking about installing a combi boiler. Read on…

comi vs conventional

 

How do combination boilers work?

Combination boilers work by delivering hot water directly from your mains water. The mains water enters the boiler and is heated up by a heat exchanger instantly, which then delivers hot water to your taps.

 

Whats the catch?

The one downside of combination boilers is they are dependant on the water pressure. You need minimum 12 litres per minute of flow coming from the mains water supply. They are generally referred to as 1-2 tap operational systems. So if you have 12 litres per minute coming out your tap as soon as you open a second tap that flow will be halved, so both taps will have 6 litres per minute instead of one having the full 12 litres.

The more flow you have coming in from your cold water supply the better the performance. Water flow from the mains can vary from 9-18 litres per minute in Cambridge.

Key questions to determine weather a combi boiler is for you or not:

  • How many bathrooms do you have?
  • How many people live in the house?
  • What are the chances or two people showering at the same time / daily routines?
  • Do you plan to extend your home ?
  • What is my mains pressure and flow rate?
  • What is the proposed location of the new combi boiler relative to the hot water outlets?

You should always contact a professional to all the above measurements in order to help yo decide which system you are going to be using.

 

Combi vs conventional chart

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FAQ for Central Heating Systems Cambridge

How much should a boiler installation cost?
A new boiler costs £600 – £2,500, depending on the model and type of system. A new combi boiler costs £500 – £900 for a budget model, £900 – £1,200 for a mid-range model and £1,000 – £2,000 for a premium model depending on the size of the boiler.23 Jun 2021

Which Worcester boiler is best?
The Greenstar 30i is Worcester’s best seller and over a million of them are in homes throughout the UK. If choosing between the two, then do consider opting for the Greenstar 30i over the Greenstar 25i as they are known to be much more reliable and often don’t have too much disparity in price.13 Jul 2021

Is a Worcester boiler worth it?
Advice from an experienced engineer However, in my experience, if you want a boiler that’s going to last you in the long term, a Worcester Bosch is always worth the price tag. The brand has proven itself time and time again to be reliable, long-lasting and efficient.10 Nov 2017

How much does it cost to service a Worcester Bosch boiler?
How much does a Worcester boiler service cost? Assuming your Worcester or Worcester Bosch boiler is working normally, without any known faults, a standard service should set you back around £100 including VAT. However, some companies may charge a little less, and some (for instance, national companies) a little more.5 Feb 2019

Which Worcester boiler is best?
The Greenstar 30i is Worcester’s best seller and over a million of them are in homes throughout the UK. If choosing between the two, then do consider opting for the Greenstar 30i over the Greenstar 25i as they are known to be much more reliable and often don’t have too much disparity in price.13 Jul 2021

Are British Gas expensive for boiler installation?
In our experience, British Gas is one of the more costly boiler installation companies. Those looking for a system boiler can expect to pay between £2,000 and £3,000 for a smaller home. In larger homes, expect to pay at least £2,500.

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