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Combi vs Conventional

  • New Boilers
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  • New Boilers
    • Boiler Finance
    • 10 Year Warranty
    • Why Worcester?
  • Systems Explained
  • Magnetic Filters
  • Combi vs Conventional
  • Smart Heating Controls
  • 10 Year Warranty
  • Systems Explained
  • Plumbing Services
  • Gas Safety

Gary and his colleague were excellent and Gary is a very good communicator and kept us informed over a period of days while he had the difficult job of sourcing a not easy to obtain flue. It is rare to find people who communicate so well and we appreciated this. The job was very well done and at a competitive price. We are very grateful that Gary and his colleague were able to fix our boiler. Many thanks.

Customer in Esher

So you’ve decided to go for a new boiler, but what is the right system for you, Combi or Coventional?

The answer is simple – there is no right or wrong answer to weather you should keep a conventional boiler or swap to the combi boiler. There are however a few key factors, which dependant on the answers will help you to make the correct decisions.

System_Features

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.

So what’s the downside?

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.

So in a nutshell the more flow you have coming in from your cold water supply the better the performance. Water flow from the mains can vary from 12-22 litres per minute.

Key questions to determine weather a combi 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 ?

Our heating advisor will ask all of these questions and help to make the right choice suited to your needs!

  Combi Conventional
Pros
  • Unlimited hot water
  • Low maintenance costs
  • Frees up space
  • Easy to install
  • Keep airing cupboard
  • Immersion as back up
  • Can add shower pumps
  • Not reliant on mains pressure
Cons
  • Poor performance if low mains pressure
  • No back up if boiler fails
  • Can’t add shower pumps to system
  • Limited hot water
  • High maintenance on system
  • Takes up a lot of space
Please give us a call on 020 3752 7583 or contact us for more details and free quotation.
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Complete Heating & Gas Ltd, 32 Elmcroft Drive, Chessington, Surrey, KT9 1DU

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