Well if you have a combi
boiler that keeps firing up randomly, then you need to think about it. But
before that you need to know about combi boilers and how they work.
What are combi boilers?
Combination boiler or combi
boilers come being one of the most common types of boilers used in UK for a
reason. Unlike the system and conventional units, the combination boilers are
designed to be an all in one unit which produces hot water for taps and central
heating in order to cut down the use of storage tanks or cylinders, thus
occupying the least space required to house the boiler. Additionally on a
comparison, the installations are much easier and faster than any other boiler
The combi boilers
operates by using the water from the main supply that results in stronger water
pressure and ensures that you would never be lacking on hot water again. The modern
highly efficient units come, being a stainless steel condensing boiler with an
inbuilt heat exchanger that operates in order to serve the customers with hot
There are two main
reasons behind the combi boilers great and powerful efficiency i.e. these units
have high operating efficiency and low internal water volume. This means when
in summer days you don’t need space heating you are only paying to heat water
which is domestically required.
Now that you are clear
about what a combi boiler is, you need to learn about how it works.
How combi boiler works?
Combi boilers are
designed to be manufactured with two independent heat exchangers, one of which
carries a pipe to the radiators while the other one carries a pipe to the hot
water supply. As soon as you turn the hot tap on, your boiler fires up to heat
water and a valve gets opened to let the water flow through the network of
A combi boiler will
usually require to pause from heating the central heating water for your
radiators while it’s heating the hot water for your tap, because they are often
not build to supply enough heat to both the points at the same time. For this
reason, you might hear your boiler switching on and off when you run a hot
water tap even if they’re already lit to power the central heating.
You might be wondering
as to why does your combi boiler fires up randomly. Here is a simple answer to
Many boiler controls
system keep the boiler unit hot at all times and that does have the logical
effect that the burner fires on a regular basis regardless of an actual cause
for heat due to standby losses.