Heating and hot water handy hints

Handy hints
Your heating and
hot water guide.
Reliable heating and hot water are essential to a home. They need to operate
smoothly, run as cost-efficiently as possible and provide the comfort levels
you want, when you want them.
A straightforward guide
As with any other important elements of a home, knowing
how to manage, look after and enhance your system and
what you should pay regular attention to will help ensure
that it always performs at its best.
This guide is designed to help you to keep your heating and hot
water system in optimum working condition. Covering all the key
aspects from boilers to radiators, storage cylinders and controls.
This guide will help you maximise efficiency, reduce running costs
and ensure comfort as well as advise on how to maintain your system.
Making the most of your system.
Controlling your heating and hot water.
Hot water storage cylinders.
Water supply.
Simple ways to protect your heating system.
Keeping your system topped up.
Top tips for saving energy and reducing running costs.
Frequently asked questions.
Which? 2014/2015 Survey
Annual servicing.
Other technologies from Worcester for your home.
Know your system.
“Worcester is the only
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meet our Best Buy
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Worcester, Bosch Group
T/A Bosch Thermotechnology Ltd.
Make sure that areas around your radiators
are always clear. Putting furniture in front or
covering radiators with long curtains will block
the heat, reducing your comfort levels.
Radiators use hot water generated by a boiler to warm the air in a room. Generally,
the hotter the temperature of the radiator, the hotter the room temperature will be.
Radiators are by far the most common form of heating in a home. In
each of the rooms that require heating, there will be one or possibly
more radiators. Radiators must always be free of air and full of
water in order to function well.
Radiator operation
If you notice a cool spot on the radiator, particularly towards the
top, it could mean that air is trapped inside. An air release vent on
the radiator allows you to release the air using a special air vent key.
Releasing air should take place when the radiator is cold.
If you have a sealed heating system (one without tanks in the
loft) then make sure that you know how to check that the water in
the system is at the right pressure and how to top up the levels
if it’s not. Please note that it is most important that your installer
has instructed you on how to do this, or visit our YouTube channel
for guidance.
Radiator performance
More often than not, radiators are sited underneath a window so
that the warm air that they generate heats the colder air coming in
through the window. A radiator will not perform as well as it should
if curtains cover it or if shelves are fitted above. Putting furniture or
tables in front of a radiator will also affect your comfort.
Even heat
Radiators should all heat up at the same even rate. To ensure that
they do, your installer should have ‘balanced’ the system. This
is achieved by adjusting each radiator’s lockshield valve, which
regulates the water flow.
Turning off radiators
In a balanced system, individual room temperatures depend on all
the radiators working at the same time. If you decide to turn off
radiators, for example in spare bedrooms or rooms that you rarely
use, you might find that rooms adjacent to those have a slightly
lower temperature.
Watch advice guides on repressurising a heating system and
bleeding radiators at youtube.com/WorcesterBoschGroup
If your radiators are getting excessively hot and the boiler is rapidly turning on
and off, the temperature of the water going to your radiators may be set too high.
This wastes energy and reduces the boiler’s efficiency. You can usually adjust the
temperature using the central heating control dial or adjustment switches on your
boiler. See page 9 for more information.
Thermostatic radiator valves
The radiators in your home should ideally be fitted with thermostatic radiator
valves (TRVs), which will enable you to control the individual temperature of each
room. They can be adjusted to suit the comfort levels you want and provide a
simple way of reducing running costs. The higher the number shown on the TRV,
the hotter the room should get, up to a maximum of around 22°C.
It is important to make sure that the area around a TRV is kept clear and is
not blocked by furniture or curtains so that it can accurately detect the room
temperature. Don’t be too concerned if the whole of the radiator is not as hot as
an uncontrolled radiator, as it’s likely that the room is up to temperature and the
TRV has temporarily shut the radiator off. Please note a TRV should not be fitted
on a radiator in the same room as a room thermostat.
Maintaining radiator valves
To prevent TRVs and on/off radiator valves from sticking, turn them a little by
hand every 2-3 months. It’s also important to check that the plastic tops on all
valves are always in position and are not cracked or damaged so as to prevent
accidents. Take care not to knock valves and pipework when vacuuming or
cleaning floors to avoid damaging them.
Radiator removal for decorating
When decorating a room it can be more convenient to remove the radiator from
its brackets allowing you to paper or paint behind it more thoroughly. Usually
this means isolating the two valves either side of the radiator and opening the
union nut connection which will allow the water in the radiator to be drained into
a container. The radiator can then be removed. Replacing the radiator after the
work has been completed requires tightening the union nuts back to the radiator
valves and then turning the valves back to where they were previously set.
If the boiler is a combi and is run on a sealed system, the system will need
re-pressurising. See our YouTube channel for guidance.
Underfloor heating
In a modern, well-insulated property, underfloor heating can act as the primary
heating source and, in most cases, no other space heating method is required.
Underfloor heating operates with lower water temperatures than traditional
radiator systems. This makes it the perfect complement for ground source and air
to water heat pumps.
The low return water temperature of underfloor heating also makes it suitable
for use with condensing boilers, ensuring they remain at their optimum efficiency,
with significant energy savings.
Controlling your heating and hot water.
Boiler controls make a big difference to your comfort and energy usage. You can decide
when you want your heating, and in some cases hot water, to come on and go off and
how warm you want your home to be. They ensure a comfortable temperature whilst
reducing your energy use, so that you only pay for what you need when you need it.
Built-in boiler controls
Your boiler is likely to have two control dials or push buttons
on the front. These are a hot water temperature control and
a central heating temperature control.
The hot water temperature control dial is for setting
the temperature of the hot water coming out of your taps
and shower.
The central heating temperature control dial is for
controlling the temperature of the water that goes from the
boiler into your radiators – not the room temperature. If the
setting is too high, the boiler will use more energy than it
should as well as wasting it.
You may also find that the radiators will get very hot and
reach the programmed room temperature very quickly,
which will turn the boiler off and then back on again when
the temperature dips down. This constant on-off action
uses more energy. A high setting will also affect the boiler’s
ability to condense (capture and re-use the heat that would
otherwise escape), which means that energy will be wasted.
It’s also important not to set the dial too low either
as the radiators will take longer to heat the rooms to the
temperature you want.
Central heating
temperature control
Hot water
temperature control
Central heating
temperature control
Hot water
temperature control
Optional controls.
Timers and programmers
A boiler timer is a basic device that allows you
to set specific times for your central heating
system to come on and turn off, with the same
times repeated every day.
A boiler programmer allows you to set your
heating and sometimes hot water to switch on
and off at different times on different days of
the week to suit your lifestyle.
Most modern programmers also
automatically adjust for British Summertime.
Plug-in mechanical timer.
Plug-in programmer.
Room thermostat
A room thermostat monitors the air temperature and enables you
to set the level you want. If the room temperature drops below this
level, the thermostat switches your boiler on.
It is very important to select the correct position
for the room thermostat. Avoid placing it close
to a window, door or in the corner of a room.
Normal locations are the hall or landing.
Room thermostat.
Find out more about the range and features of Worcester controls at worcester-bosch.co.uk/controls
Programmable room thermostat
A programmable room thermostat is both a boiler
programmer and a room thermostat, and allows
you to set different room temperatures for different
times of the day and night. When programmed
correctly, it prevents the system from having to
heat your home from a cold start. The boiler simply
‘tops up’ the temperature, which saves energy and
improves comfort.
Smart control
The Wave, Worcester’s smart control for central heating and hot
water, can be operated from a compatible smart device using a
wireless internet connection. Simple to use, it includes a host of
clever features, including automatic adjustment of your boiler to
ensure your heating and hot water preferences are met.
The control can be adjusted through a built-in touch screen or via
the downloadable Wave app. The app also provides usage information
and identifies where you could potentially make energy savings. To
check if your boiler is compatible with the Worcester Wave please visit:
Greater energy efficiency
Controls with ‘load compensation’ and ‘weather compensation’
features improve energy efficiency even more.
Load compensation means that the temperature of the hot
water going to your radiators is adjusted in keeping with the room
temperature. With this feature, when a room is cold the temperature
of the hot water going to the radiator is high, but as the room warms
up the temperature is lowered so that comfort is maintained whilst
energy use is reduced.
Weather compensation means that the temperature of the hot
water going to your radiators is adjusted in keeping with the outside
temperature. With this feature, radiators run hotter if temperatures
outside drop, but on milder days they automatically run at a lower
temperature, boosting energy efficiency and lowering your bills.
Programmable room thermostat.
Worcester Wave ‘smart’ control.
Watch easy step-by-step guides to controls at youtube.com/WorcesterBoschGroup
The thicker the insulation level on a cylinder,
the better it is at retaining heat. Most new
cylinder insulation ranges from 55-65mm.
Worcester Greenstore solar compatible
unvented cylinder.
Hot water storage cylinders.
Hot water cylinders are either open vented (fed from a cold water storage tank in your roof) or unvented
(also known as mains pressure) which are connected directly to the water mains.
Unvented cylinders
Unvented or mains pressure cylinders are the perfect complement for system or regular boilers. Hot water is
supplied at mains pressure for powerful showers and fast bath filling, and multiple taps can be used at the
same time. Even if your mains water pressure is low, you can still benefit from high performance, fast re-heat
times and energy savings.
Unvented solar cylinders
Solar-compatible unvented cylinders are specifically designed to work with solar water heating systems.
With all the same benefits as standard unvented cylinders, they enable you to add solar water heating to your
system at a later date with no need to replace the cylinder. They will provide highly efficient storage for both
boiler and solar-heated hot water.
Preventing heat loss
To prevent heat loss from pipes and old cylinders, ensure an adequate level of insulation or ‘lagging’ is fitted.
Modern cylinders have insulation integrated into the casing and therefore do not need external insulation.
Calcium carbonate
100 – 200mg/l
To find out if you live in a hard or soft water area visit: ecowater.co.uk/post-code-checker
Please note: This map is still only a generalisation. Hardness does often vary from postcode to postcode, so please contact your water supply
company for information on the specific level of hardness in your water.
Water supply.
Hard and soft water
Rainwater absorbs naturally hard minerals from the ground on its way from the
surface to the waterways. Whether somewhere is a ‘hard’ or ‘soft’ water area is
determined by the amount of hard minerals such as chalk, lime and calcium it
contains. Areas in the north of the UK tend to have softer water whilst areas
in the south experience higher levels of hardness.
Areas of hard water
Hard water leaves limescale deposits on things like pipes, hot water systems,
kettles, electric irons and domestic appliances. Over time in areas with very hard
water, limescale may build up in the boiler’s heat exchanger, which can reduce
efficiency and possibly the flow rate, which in turn can effect your comfort.
If the water hardness count in your area is over 200 parts per million (you can
check this with your local water company), this build up can be prevented by
fitting a scale prevention device or water softener to the incoming mains.
Cloudy water
In certain areas of the country, at certain times of the day, heated domestic
water might occasionally have a cloudy or milky appearance. This is completely
harmless and is caused by the millions of air bubbles (carbon dioxide) that are
created when the water is heated. Just like the cloudy water that you might get
when you fill a glass from a tap, this will settle and clear.
Combi boilers and water meters
When a hot water tap is turned on and then turned off, a small amount of the
water expands, which is allowed to travel back into the water mains under water
regulations. Water meters prevent water from flowing back into the mains
so if one has been fitted, in some cases there may be a build up of pressure
between the turned off hot water tap and the meter. This could cause taps or
showers to drip.
If you have a combi boiler and a water meter was already in place when it was
installed, your installer may have needed to fit an expansion vessel to the mains
water pipework. This absorbs all of the expansion water. If you had a water meter
fitted after your boiler was installed, you may benefit from having an expansion
vessel added. In both cases, ask your installer for advice.
Hard water deposits can block pipe work and
damage internal boiler components.
Simple ways to protect your
heating system.
System flushing and cleansing
If you’ve had a boiler installed in the last year or two then
it is likely that your installer flushed and cleaned the
heating system.
If your boiler is older and is making a noise or your
radiators are hot at the bottom and cold at the top,
your system water may be contaminated. This can
be remedied by flushing the system with a chemical
cleanser and then adding corrosion inhibitor. Your
installer will be able to advise you about this.
Keeping your system clean
Even if you’ve had your heating system flushed, over time
the water in it can accumulate harmful dirt and debris
from mains water limescale deposits and from fragments
shed by older radiators and boilers. This can reduce
efficiency and cause damage to the boiler.
There are a number of different types of filtering
products available that can prevent heating system
contamination, one of which is the Worcester Greenstar
System Filter, which captures contaminants before
they reach the boiler. This safeguards the boiler against
damage, prevents radiator blockages and protects
the efficiency of the system.
A Greenstar System Filter
reduces and removes debris that
builds up in the heating system.
Learn about how to keep your heating system clean at youtube.com/WorcesterBoschGroup
Keeping your system topped up.
There are three ways to top up your system, which will depend on the type of boiler
you have. Ask your installer if you are not sure which method applies to your boiler.
Alternatively, see the ‘Homeowner’ section of our website at worcester-bosch.co.uk/faqs. With all three methods you should turn off
the power to the boiler before you start, and stop the process when the pressure gauge reaches 1 bar.
1. An external filling hose
This needs to be connected manually
between the filling link and mains
water connection.
2. Worcester internal filling key
3. Worcester keyless filling link
This is normally located under the boiler
and needs to be inserted into the filling link,
enabling you to increase the pressure of
your system.
This is the quickest and easiest method.
It is permanently fitted to certain wallmounted Worcester combi boilers and has
a lever underneath. To top up the system,
simply pull the lever down until the correct
pressure is achieved then release.
Watch how to top up your system at youtube.com/WorcesterBoschGroup
Top tips for saving energy
and reducing running costs.
Around 30% of the heat loss from your home is through the
roof. You can reduce this considerably by insulating the roof
space. You may be able to get a grant towards this.
Keeping a bath warm
If your bath is made of cast iron or pressed steel, the water
is likely to cool quicker. Putting insulation underneath and
around the bath will keep the water warmer and save energy.
Window frames
Single glazed windows, particularly those with steel frames,
can lose a great deal of heat so you could consider replacing
them with PVCu, wooden framed double glazed units, or
more affordable secondary glazing solutions.
Room thermostats
Lowering the setting of your room thermostat by 1°C
can reduce fuel consumption by up to 10%.
Lined or heavier fabric full-length curtains can provide
excellent insulation. However always ensure that they
don’t cover your radiators.
Use a suitable draught excluder to cut out heat loss from
areas such as doors, windows, letterboxes and keyholes.
Thermostatic taps and showers
It’s advisable to have thermostatic taps and showers,
particularly if you have young children, as water straight
from a tap can be very hot.
Bath filling
Your bath will fill quicker if you run hot water only into the
bath then add cold water after. But always take care around
small children.
If radiators are fitted to an outside wall, fix reflective foil on
the wall behind them to reduce heat loss through the wall.
New controls
Upgrade to the latest available heating controls. You’ll need
a programmer, linked room thermostat and thermostatic
radiator valves as a minimum. Controls with load and weather
compensation features boost energy efficiency even more.
Solar panels
Adding solar water heating panels to your system will give
you up to 60%* of your hot water free and from a green
energy source.
After bathing
Once you have used your bath there is still a lot of useful heat
in the water, heat that can contribute to heating your home. If
condensation isn’t an issue you could leave the water within
the bath until it has gone cold.
Watch how to save energy around the home at youtube.com/WorcesterBoschGroup
* Source: Energy Saving Trust.
Frequently asked questions.
Q. Why does so much white steam come from my flue?
A. If you have had a boiler installed since April 2005, it will be a
high efficiency condensing type. Condensing boilers operate more
efficiently than non-condensing ones as they extract more heat
from the flue gases. In certain weather conditions, particularly
when it’s cold, the temperature of the flue gases may drop,
and you may see a plume – a misty vapour – coming out of the
flue. This plume is perfectly normal and means that the boiler is
operating efficiently.
Q. What sort of shower should be run off a combi boiler?
A. Because combi boilers produce hot water at mains pressure
they are compatible with either a mains pressure balanced or
thermostatically controlled shower.
In contrast, when a regular boiler and cylinder has been replaced
with a combi boiler, any existing shower should be examined
for suitability. This might be a pump assisted power shower, for
example, which is designed for low-pressure systems and it may
need adjusting or replacing.
Q. Should I have a water softener fitted to my boiler?
A. Water softeners are now commonly used, especially in hard
water areas around the UK.
With a condensing boiler, if you intend to use a softener unit you
must remember that due to the change in the pH level, it would be
unwise to fill your central heating system with such water as this
could reduce the life of your central heating and pipe work.
It is wise when adding water using the filling loop to your
condensing boiler, that this is fitted prior to the softener unit.
It is acceptable for water supplied into the boiler for hot water
from taps to be softened water. This will have no negative effects.
A build-up of limescale in hard water areas can affect efficiency and
damage components.
Q. What happens if I suffer a power cut?
A. In the event of a power cut, a digital programmer will normally
retain its settings for a set period depending on the model. A
mechanical analogue timer with a clock face will stop when the
power goes off, so when the power is restored you will need to
reset it to the correct time. Once the timer has been reset, the
boiler will operate as normal.
Q. What happens if I run out of gas or oil?
A. With a natural gas-fired boiler you are connected to the mains gas
supply line, so unless the gas line is interrupted for some reason it’s
unlikely that you will ever run out of gas. If you have an LPG or oilfired boiler, you will need to order LPG or oil as and when required.
Keep an eye on the level of fuel in your storage tank and make sure
that you order supplies well in advance of it running out. If you
completely run out of LPG or oil, air will need to be removed from
the fuel supply line that runs from the tank to the boiler. It is always
recommended that you ask your installer or service engineer to do
this before you use your boiler again.
Q. How do I fill my system?
A. If you have a combi or system boiler, which are both sealed
systems, there is likely to be a water pressure gauge on the front.
This should be at a setting of around 1 bar whilst the heating is off.
When the boiler is operating, the gauge will usually rise to 1.5 bar
or more and when the system cools down again it should return to
around 1 bar.
If the gauge has dropped below the 1 bar level, there is likely to
be a small leak in the system and the water pressure will need to be
topped up with mains cold water. You will only need to do this if you
have a sealed system boiler.
If you have a question that isn’t answered here then please visit: worcester-bosch.co.uk/faqs
where you will find a range of frequently asked questions and answers from our experts.
Q. Why do some boilers stop working in freezing weather?
A. Condensate is water vapour gathered from the boiler’s flue and is
a natural feature of all condensing boilers. It is discharged via a pipe
into a property’s drainage system. However, if the outside temperature
is below freezing for a prolonged period, external discharge pipes or
those in a cold area, such as a garage, can freeze. This prevents the
condensate from draining away and causes the boiler to stop working.
There are a number of ways in which the risk of frozen
condensate can be eliminated, one of which is the Worcester
CondenseSure. This helps prevent external condensate pipes
from freezing even in the harshest winter conditions and has been
independently tested at a continuous temperature of -15°C for a
period of 48 hours. It works with all new and existing condensing
boilers, is simple for your installer to fit and, unlike some other
products, doesn’t use any electricity.
Q. What does the ‘SE’ code mean on my Greenstar CDi boiler?
A. This is a feature of certain Worcester Greenstar CDi boilers and
is a reminder that the boiler requires its annual service. The code is
activated after 2,324 burner hours, which is the estimated average
burner run time over a 12 month period.
You should contact your installer to arrange for a service visit,
but in the meantime you can clear the code by following the
instructions in your boiler user manual. If you have lost your manual,
you can download a new one from our website.
Watch how to thaw and prevent frozen condensate pipes at youtube.com/WorcesterBoschGroup
Even if your boiler is working perfectly,
having it serviced every year is essential.
The best time to have this done is in the
summer or early autumn so that your
boiler is in top condition and ready to
keep your home reliably warm through
the winter months.
Annual servicing.
It’s very important to have your boiler serviced every year. Just like a car,
it needs to be well maintained in order to keep it operating at its best. An
annual service makes sure that your boiler continues to function safely
and efficiently and prevents minor faults from becoming major problems.
Gas-fired boilers should be always be serviced by a registered Gas Safe
engineer and oil-fired boilers by a registered OFTEC engineer.
Keeping your boiler clean
The boiler should ideally be kept in a dust-free environment. To clean the
front of the cabinet and side panels, use a cloth dampened with plain
water or a very mild solution of washing up liquid.
To book a boiler service please visit out website to find an installer near you who offers servicing.
Alternatively, you can book a Worcester service engineer by calling 0300 123 9339,
or emailing: service-appointments@uk.bosch.com
Other technologies from Worcester
for your home.
Greenskies solar thermal panels.
Greenskies solar hot water heating panels absorb solar energy and convert it to heat.
Effective even on a cloudy day, they can provide up to 60%* of your home’s hot water
requirements from a clean, renewable source.
They can be installed on or in a sloping roof, on a flat roof or even on a wall or floor,
and come with a range of optional controls to enhance efficiency.
Greenstore ground source heat pumps.
Ground source heat pumps work by drawing renewable energy from the ground and converting it
into low cost, low carbon heating and hot water all year round.
For every single kilowatt of electricity used to power high efficiency Greenstore ground source
heat pumps, the system can generate four kilowatts of energy for the home, which can
mean significant savings on your energy bills.
Available in a range of capacities, they are designed to be the sole source of heat generation.
They are suitable for well-insulated homes of all types and ages.
Greensource air source heat pumps.
Designed for optimum efficiency, air to air heat pumps can generate up to five kilowatts of heat from
every one kilowatt of electricity used to power them.
In addition to generating hot air for distribution around the home, Greensource air to air heat
pumps can also act as an air cooler during the summer and feature advanced air purification
technology, which is particularly beneficial to allergy sufferers.
* Source: Energy Saving Trust.
Know your system.
There are a number of different boiler systems, so knowing which one you have is an
important first step for maintaining and benefiting from the efficiencies it offers.
The three main boiler types are combi, system and regular. To help you identify the system that you have, the following
illustrations show how they are typically set up in a home, and what elements they typically contain.
Typical combination boiler heating system.
A combination or ‘combi’ boiler is both a high efficiency water heater and a central
heating boiler in a single compact unit.
Combi boilers heat water directly from the mains when you turn on a tap,
so you won’t need a hot water storage cylinder or a cold water storage tank in
the roof space. They are also very cost-effective and energy-efficient as water is
heated instantly rather than being heated and then stored in a cylinder.
An added benefit is that hot water is delivered at mains pressure, which means
that you could get a powerful shower without the need for a separate pump.
Cold mains feed
System images for guidance only.
Typical system boiler heating system.
System boilers require a cylinder for storing hot water, however the major heating and
hot water system components are built into the boiler itself, making it quicker and
easier to install.
In addition, there is no need for a tank in the loft, so it can be an option in a
home with little or no loft space or where the space is earmarked for a conversion.
These boilers are also compatible with solar water heating systems, which deliver
environmental benefits as well as lower energy bills.
hot water
Cold mains feed
System images for guidance only.
Getting to know which boiler system
you have will help you make the most
of it and look after it the right way.
Typical regular boiler heating system.
Regular boilers (sometimes known as traditional, conventional or heat only boilers)
are ideally suited to homes that already have a traditional heating and hot water
system which is linked to a separate hot water cylinder. These boilers also need a
cold water storage tank in the loft to feed the hot water cylinder as well as a tank
that maintains the water level of the central heating system. A regular boiler may be
the best option for replacing an existing boiler if the property has an older radiator
system, as it might not be able to cope with the higher water pressure that is
delivered by system or combi boilers.
heating Hot water
feed tank feed tank
Vented hot
water cylinder
Cold mains feed
System images for guidance only.
Solar thermal panels
Typical system or regular boiler heating system
with solar thermal hot water.
System and regular boilers are perfect partners for Worcester Greenskies solar hot
water systems (also known as solar thermal). In a solar thermal system, the panels
harness heat from the sun, which is used to heat the water stored in a solar compatible
hot water cylinder. The boiler is linked to the system and automatically starts up if the
water in the cylinder falls below the required temperature, ensuring you have all the hot
water you need all year round.
Solar pump
Solar compatible
ho water
unvented hot
Cold mains feed
System images for guidance only.
Useful numbers
Consumer Technical Helpline
(Pre & Post Sales)
Tel: 0330 123 3366
Fax: 01905 752741
Email: technical-advice@uk.bosch.com
Renewables Technical Helpline
Email: renewable-advice@uk.bosch.com
or telephone 0330 123 9229
Email: brochure-request@uk.bosch.com
or download instantly from our website
or telephone 0330 123 9119
Customer Service
Service Enquiries
Email: service-enquiries@uk.bosch.com
or telephone 0330 123 9559
Engineer Appointments
Email: service-appointment@uk.bosch.com
or telephone 0330 123 9339
Guarantee Registration
To register your Worcester guarantee,
please visit our website
or telephone 0330 123 2552
Calls to 03 numbers cost no more than a national rate call to an 01 or 02 number and must count towards any inclusive minutes in
the same way as 01 and 02 calls. These rules apply to calls from any type of line, including mobile, BT, other fixed phone line or payphone.
Calls from mobiles and some other networks may vary. Calls to and from Bosch Thermotechnology Ltd may be recorded for training and
quality assurance purposes.
Worcester, Bosch Group is a brand name of Bosch Thermotechnology Ltd.
This brochure is accurate at the date of printing, but may be superseded and should be disregarded if specification and/or appearances
are changed in the interest of continued improvement. The statutory rights of the consumer are not affected.
8 716 104 727 E 05/15
Worcester, Bosch Group,
Cotswold Way, Warndon,
Worcester, WR4 9SW
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