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8/18/2019 Types of Boilers Explained _ Worcester, Bosch Group
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Boilers ExplainedHome (/) / Products (/products) / Boilers (/products/boilers) / Explained
Learn about boilersDeciding which boiler will make an ecient and practical !t with "our home and li#est"le can be con#using$ %he
images below show the main s"stem t"pes& how the" work& their ad'antages and what kind o# homes the" work
best in$
%"pes o# boiler
ombi Boilers
ccept (https*//www$worcester+bosch$co$uk/cookie+polic"+accept)
,e use cookies to create the most secure and e##ecti'e website possible$ B" continuing to use our website "ou are agreeing to
our use o# cookies$
-ore in#ormation (http*//www$worcester+bosch$co$uk/cookies)
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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.iew our combi boilers (https*//www$worcester+bosch$co$uk/products/boilers/director"boiler%"pe0combi)
combination or 1combi2 boiler is both a high ecienc" water heater and a central heating boiler in a single
compact unit$ ombi boilers heat water directl" #rom the mains when "ou turn on a tap& so "ou won2t need a hot
water storage c"linder or a cold water storage tank in the roo# space$
%he" are also 'er" cost+e##ecti'e and energ"+ecient as water is heated instantl" rather than being heated and
then stored in a c"linder$ n added bene!t is that hot water is deli'ered at mains pressure& which means that
"ou could get a power#ul shower without the need #or a separate pump$
ompact si3es make combi boilers per#ect #or smaller properties
4deal where there is little or no lo#t space
5o need #or a hot water c"linder allows increased li'ing space
5o cold water storage tank #rees up a lo#t #or con'ersion
5o risk o# lo#t pipework #ree3ing
Less pipework in the home makes installation t"picall" cheaper
6"stem Boilers
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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.iew our regular boilers (https*//www$worcester+bosch$co$uk/products/boilers/director"boiler%"pe0regular)
9egular Boilers
9egular boilers (sometimes known as traditional& con'entional or heat onl" boilers) are ideall" suited to homes
that alread" ha'e a traditional heating and hot water s"stem which is linked to a separate hot water c"linder$
%hese boilers also need a cold water storage tank in the lo#t to #eed the hot water c"linder as well as a tank that
maintains the water le'el o# the central heating s"stem$
regular boiler ma" be the best option #or replacing an existing boiler i# the propert" has an older radiator
s"stem& as it might not be able to cope with the higher water pressure that is deli'ered b" s"stem or combi
boilers$
Per#ect #or homes where a lot o# hot water is used at the same time
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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4deal where there are two or more bathrooms
good option in areas where water pressure is low
ompatible with solar water heating s"stems #or a lower carbon #ootprint and lower energ" costs
4mportant terms and de#initions
Term Definition
ondensing %echnolog"
ondensate
hanges to go'ernment legislation and technolog" ad'ances in boiler
design has dri'en boiler designs to condense to ensure as much heat as
possible is con'erted into use#ul heat #or "our home$ B" condensing& "our
boiler will ensure at least :;p in e'er"
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Term Definition
ErP 9ating %he ErP 9ating is a new re7uirement set b" the European >nion which is
designed to dri'e impro'ements in the ecienc" and per#ormance o#
heating and hot water products$ %he ErP rating introduces new ecienc"
classes #rom ?? to @ which are displa"ed on a labels which come with the
boiler$ ErP labels are alread" a common sight on washing machines&tele'isions and other appliances within electrical retailers$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
Alue %he ue is the part o# the boiler which allows exhaust gases to exit the boiler$
%he ue is t"picall" situated directl" behind the boiler enabling waste gases
to exit sa#el" straight out o# the external wall o# "our home$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
Alow 9ate Cuoted #or ombi boilers& a ow rate represents how man" litres o# hot
water comes out o# the tap in a minute$ our ow rate is determined b" the
amount (and pressure) o# water that is entering "our propert" #rom the
water main and the abilit" o# the boiler to heat that water to the temperature
"ou ha'e set$ %he more power#ul a boiler is (represented in k,)& the #asterthe boiler will be able to heat the water coming into "our home$
Howe'er it is important to recognise a high k, output will not alwa"s
increase "our ow rate$ 4# "ou ha'e =; litres per minute coming into "our
propert"& "ou will onl" be able to recei'e =; litres per min o# hot water$ Aor
example ha'ing a boiler that has a maximum ow rate o# = litres per min
will not increase the amount o# hot water "ou recei'e& i# "ou onl" ha'e =;
litres per min coming into "our boiler$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
@as 6a#e ccreditation
@reenstar
@as 6a#e ccreditation is the hallmark #or gas sa#et" in the >F$ n installer
must be on the @as 6a#e 9egister to be legall" allowed to work on "our boiler
or an" other gas appliances in "our home$ www$gassa#eregister$co$uk
(http*//www$gassa#eregister$co$uk/)
@reenstar is the name gi'en to all o# the ,orcester @as !red boiler range&
and signi!es high energ" ecienc"& reliabilit" and com#ort$ %here are more
than G million @reenstar ombi boilers !tted in >F homes$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
A%E ccreditation A%E is a trade association that takes a lead role in setting industr"
standards o# oil+!red boilers$ A%E manages a competent person
registration scheme& enabling "ou to !nd installers who install& commission
and ser'ice oil+!red products$ ,e alwa"s recommend that "ou choose a
7uali!ed A%E installer #or "our installation$ www$o#tec$org(http*//www$o#tec$org)
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
pen .ent
6EDB>F 9ating
%his is a term which is also used to describe a 9egular boiler t"pe$ pen
'ent s"stem will ha'e a Ipen .entJ and tanks within the lo#t space$ %his t"pe
o# heating s"stem is t"picall" common in older propert"2s$
6EDB>F stands #or 6easonal Ecienc" o# Domestic Boilers >F$ 4t pro'ides a
rating structure which pro'ides both a percentage ecienc" score as well as
to @ rating enabling an eas" comparison o# boilers$ 6EDB>F has been
integrated to the recent ErP labelling directi'e$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
6tandard Ecienc" (@ 9ated) ld I6tandard Ecienc"J boilers waste large amounts o# heat as the" don2t
ondense and rec"cle the heat be#ore it lea'es "our boiler 'ia the ue$ 4n the
current 6EDB>F rating structure a 6tandard Ecienc" boiler would be
deemed @+rated and is likel" to be K; less ecientM than a new ,orcester
+rated boiler$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
6"stem Ailter
6"stem Alushing
s"stem !lter is a speci!call" designed unit which aims to remo'e and !lter
magnetic and non+magnetic contaminants #rom "our central heating s"stem
be#ore the" reach "our boiler$ Building 9egulations alwa"s recommends a
s"stem !lter be !tted to "our heating s"stem pipes prior "our boiler to
pre'ent an" damage to ke" components$
'er time ox"gen in the heating s"stem can react with the metals and
components o# a heating s"stem such as radiators to produce magnetite
(rust) particles& which becomes suspended in "our s"stem water$ %his
process and the build+up o# other chemicals (such as lime scale) can 7uickl"
cause blockages and damage ke" components within the boiler and s"stem$
%o pre'ent this a process o# thorough s"stem ushing should take place
when !tting a new boiler onto an old heating s"stem$ %his process in'ol'es
#orcing old s"stem water out o# the heating s"stem& whilst simultaneousl"
!ltering the s"stem until all o# the old water and contaminants are remo'ed$
Ainall" inhibitor and a s"stem !lter is added to pre'ent an" #uture sludge and
contaminants #rom building up$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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Term Definition
%9.
,eather ompensation
%hermostatic 9adiator .al'es (%9.2s) enable "ou to control the indi'idual
temperature o# each room in "our home& and can be ad8usted to the
com#ort le'els "ou want$ %he higher the number selected on the %9.& the
hotter the radiator and warmer the room$ Please note a %9. should not be
!tted on a radiator in the same room as a room thermostat$
,eather ompensation is a #eature which is programmed into selected
boiler controls and @reenstar 4 ombi boilers$ Designed to impro'e com#ort&
the #eature automaticall" ad8usts the temperature o# "our s"stem to
compensate #or the weather outside$ E$g$ i# the temperature outside drops&
"our radiators will run hotter& whilst i# the temperature increases the boiler
produce less heat& reducing "our running costs$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained
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@et #ree 7uotes and ad'ice
Aind a local installer
Each heating s"stem needs custom designing$ B" using the search #eature& "ou can !nd and contact a ,orcester
ccredited 4nstaller (https*//www$worcester+bosch$co$uk/how+to+bu") in "our area to book a home 'isit$
#ter calculating the best s"stem #or "our home& "our installer (https*//www$worcester+bosch$co$uk/how+to+bu") wil
then come and 'isit "ou at home to assess "our heating and hot water needs and gi'e "ou a #ree estimate$
6earch
ontact one o# our installers and be in with a chance to win
8/18/2019 Types of Boilers Explained _ Worcester, Bosch Group
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team on ;KK; =GK :KK:$
es of Boilers Explained | Worcester, Bosch Group https://www.worcester-bosch.co.uk/products/boilers/explained