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Fired Earth, Twyford Mill, Oxford Road, Adderbury, OX17 3SX
Tel: 01295 812088 Fax: 01295 810832 www.firedearth.com
© Aga Consumer Products Limited trading as Fired Earth. December 2007
www.firedearth.com
Underfloor Heating
Installation Guide
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Contents
Electrical Underfloor Heating 4
Fired Earth Underfloor Heating 4
Recommendations and Technical 7
Installing Your System 8
Specifications 9
Glossary 10
Underfloor heating was invented by the Romans. They
realised it was the most efficient and effective form of
heating, this is as true today as it was then.
The Fired Earth range of electric systems take the Roman
genius into the modern era, enabling underfloor heating to
be laid simply and efficiently in new and existing buildings.
Fired Earth have systems that can be used as the sole
source of heating or simply just to warm an otherwise cold
floor. They are suitable for use with all Fired Earth floor tiles.
Underfloor Heating
Installation Guide
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Fired Earth Underfloor Heating
There are three types of underfloor heating
available. The descriptions below will help
you choose the most suitable type for your
particular installation.
Floor Warming mat – setting the standard
in underfloor heating. Provides comfortable
warmth in all Fired Earth tiled floors.
Sole Source heating – a system powerful
enough to be the sole form of heating even
in a conservatory.
Bathroom Mat – an earth braided system
for use in all bathrooms including
‘wet’ areas.
Floor Warming Mat
160 watts/m
2
This mat makes a warm floor underfoot an
affordable luxury, making any tiled surface
in any room a joy to walk on.
It is widely accepted that heating mats are
superior to loose cable systems, as
they are much quicker to install and
have regulated cable widths, so you
always get a good even heat spread
with no hot or cold spots.
• Fabric backing for better
installation
• Powerful 160 watts/m
2
output to
warm even the thickest tile
• Only one connection cable for
easy installation
• Adds only 5mm to the floor depth
• Surpasses international safety standards
• 10 year guarantee
• No electro magnetic field
The Floor Warming mat has a fabric
backing allowing adhesives to be fully
absorbed, thereby allowing a perfect bond
between the tiles and subfloor.
Technical Data
Floor Warming mat
Operating voltage: 230/240v
Output: 160 watts/m
2
Width: 500mm
Size: 2-10m
2
Guarantee: 10 years
Sole Source Heating
200 watts/m
2
The Sole Source mat has been designed for
sole source of heating in conservatories,
extensions and other areas. At 200 watts/m
2
this mat system is one of the most
powerful on the market. The system:
• Is ultra thin, adding only 5mm to the
floor depth
• Is available in 500mm width
• Can be installed either directly beneath
the tiles or in the screed for off peak
electricity use.
If using underfloor heating for sole source
heating, it is very important to have
insulation either under the screed or
directly below the heating.
To make sure the heat output is sufficient
we offer a free planning service, whereby
we can calculate both the heat requirement
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There are many benefits to our electric
underfloor heating system:
• All our cables are double insulated with
an internal earth sheathing. The systems
have been tested and comply with
worldwide standards and regulations.
• They are very thin usually adding only
5mm in total to the depth of the floor.
• They are 100% efficient.
• They free up valuable wall space.
• They are fully controllable with
rapid response times when installed
with suitable thermal boards and are
run independently of your central
heating system.
• Radiant heat reduces drafts and is more
effective than convective heating.
• They are simple and quick to install
With an extensive range of sizes and
systems you can install electric underfloor
heating in any size room or location.
Electric underfloor heating is an
affordable luxury
Buying and installing underfloor heating is
easy, all you need is the correct size heating
mat, a programmable Thermostat and an
RCD (this is not required if you already
have one on your main electricity board).
All installations should be surveyed by a
suitably qualified electrician to check for
the availability of sufficient supply and
that the installation will meet current
IEE regulations.
Electrical Underfloor Heating
For your convenience, a full estimating
and installation service is available.
Simply give drawings to your local
store. The Fired Earth range is designed
for use under tiled floors only.
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Bathroom Mat
160 watts/m
2
Although any of our underfloor heating
products are suitable for use in bathrooms
we have developed a system which is
specifically designed for wet bathrooms.
This system is easy to install, extremely
robust and available in 300mm widths
giving a better floor coverage around
bathroom furniture. It is ultra thin, adding
only 5mm to the depth of the floor and is
rated at a powerful 160 watts/m
2
. This
system has been designed with a
completely unique external earth braid and
grid system to comply with all forthcoming
European and International guidelines and
directives. This is the safest underfloor
heating system in the world.
• Ideal for bathrooms as they quickly dry
wet floors.
• Fitted with unique external earth braid
for additional safety even in shower areas.
• 300mm wide for better coverage and
easier installation.
• Fabric backing for better installation.
Technical Data
Bathroom Mat
Operating Voltage: 230/240v
Output: 160 watts/m
2
Width: 0.3m
Size: 0.9-3.6m
2
Guarantee: 10 years
The Bathroom range has been tested
and emits a magnetic field that is lower
than international safety limits.
Recommendations and Technical
What else do I need to install an
underfloor heating system?
All you need is the correct heating system,
a control (timer/thermostat), an RCD and
the adhesives/leveller to stick the system
onto the sub-floor.
What size heating system do I need?
It is important to make sure that you have
the correct size heating system. Underfloor
heating is not laid under permanent
furniture (kitchen cabinets and sanitary
ware), just in the free floor space. For
example, the bathroom in the diagram on
the left is 4.5m
2
of floor area, but the actual
amount of underfloor heating required is
only 1.5m2.
What controls do I need?
We recommend installing a
timer/thermostat; this will allow you total
control of your heating whilst ensuring
maximum efficiency.
Our thermostats are
covered by a one year
guarantee.
What electrical/subfloor preparations
do I need to make?
We recommend a qualified electrician carry
out all electrical work. The electrician will
need to provide the correct size spur and
deep single back boxes for the control and
Residual Current Device (RCD). An RCD is a
safety device (circuit breaker) which is
essential for the validation of the guarantee
and to comply with IEE guidelines. Prepare
the sub-floor ready for the final floor finish.
An RCD is only required if you do not
already have one on the mains. The wiring
to the thermostat should be channelled into
the wall and protected by plastic trunking
or conduit.
Free Planning Service
We can calculate for you, both the
heat requirement of the area and
the amount of heating mat that
needs to be installed.
Please ask instore for information
about our free planning service.
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of the area and the amount of heating mat
that needs to be installed. In rare cases it
may be that additional heating is required.
Technical Data
Sole Source Heating
Operating Voltage: 230/240v
Output: 200 watts/m
2
Width: 500mm
Size: 2-8m
2
Guarantee: 10 years
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Code Dimensions
Mat
Size
Total
Watts
Fitting
Tape
Dual
Lead
Single
Lead
Floor Warming Mats - 160 watts/m
2
UFHFW2
0.5x4.0 2m
2
320
UFHFW3
0.5x6.0 3m
2
480
UFHFW4
0.5x8.0 4m
2
640
UFHFW5 0.5x10.0 5m
2
800
UFHFW6 0.5x12.0 6m
2
960
UFHFW7 0.5x14.0 7m
2
1120
UFHFW8 0.5x16.0 8m
2
1280
UFHFW10 0.5x20.0 10m
2
1600
Sole Source Heating - 200 watts/m
2
UFHS2 0.5x4.0 2m
2
400
UFHS3 0.5x6.0 3m
2
600
UFHS4 0.5x8.0 4m
2
800
UFHS5 0.5x10.0 5m
2
1000
UFHS6 0.5x12.0 6m
2
1200
UFHS7 0.5x14.0 7m
2
1400
UFHS8 0.5x16.0 8m
2
1600
Bathroom Mats - 160 watts/m
2
UFHB0.9 0.3x3.0 0.9m
2
144
UFHB1.2 0.3x4.0 1.2m
2
192
UFHB1.8 0.3x6.0 1.8m
2
288
UFHB2.4 0.3x8.0 2.4m
2
384
UFHB3.6 0.3x12.0 3.6m
2
576
RCD13AMP Residual current device 13amp - maximum 3.1kw
RCD25AMP Residual current device 25amp - maximum 6kw
UFHTHERMOSTAT Thermostat and timer (for floor warming or bathroom use)
UFHTHERMOSOLE Thermostat and timer (sole source)
Installing your system
We offer a full installation service if
required. A comprehensive installation
guide is provided with our mats. Copies
are available on request.
Will it help to have insulation below the
heating mat?
Insulation will make the property more
thermally efficient and the heating more
effective. Tile backer insulation boards are
available in thicknesses of as little as 10mm,
which are ideal for floor insulation.
What are the running costs?
Basically, a kilowatt of electricity (1000
watts) costs about 7p per hour at peak
rate (consult your electricity board for
accurate prices).
Our underfloor heating mats are rated
between 160 watts and 200 watts per
square metre. Detailed below are
calculations based on the worst case
scenario, the floor having a concrete
subfloor without insulation (with insulation
or tile backer boards running costs can be
cut by as much as 50%).
•1m2of 160w costs approx. 1.12
pence/hour
•1m2of 200w costs approx. 1.40
pence/hour
The programmable thermostat allows you
to set the temperature of the floor for
comfort and economy. The heating can also
be programmed to switch on or off so the
floor is warm just when you need it!
What happens if the system goes wrong?
Once the underfloor heating is installed
and the floor covering is laid on top, the
heating mat will not malfunction and is
covered by our 10 year guarantee. If the
fault is diagnosed once the floor is down,
it can be traced down to beneath 1 or 2
tiles. We have never had to take up a
complete floor.
Specifications
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Step 1 -
Plan where to
install your heating mat.
Step 2 - Cut the fabric
backing and bend the
heating mat to fit the
room.
Step 3 - Stick your mat
to the prepared subfloor
and apply a thin layer of
adhesive over the mats.
Always use flexible
adhesive and grout.
Step 4 - Apply the tile
adhesive and tile. To allow the
adhesive to dry naturally, the
heating systems cannot be
turned on for two weeks after
installation of the floor tiles.
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Ancillary Products
A full range of high quality fixing and
sealing products, researched and developed
to meet Fired Earth standards, are available
for both professional and DIY use.
Website- www.firedearth.com
All our installation guides are available
to download from our website.
Useful Numbers
UK Sales 0845 366 0400
Export Sales +44 (0)1295 814316
Installations 01295 814310
Technical 01295 814271
Home Deliveries 01295 814313
Other Guides Available
Wall Tiling, Floor Tiling,
Wood Flooring and Waterproofing
Showers and Bathrooms.
Disclaimer
The specifications and technical information given
in this publication are intended for guidance and
although they are to the best of our knowledge correct,
they are given without warranty.
We cannot accept any responsibility for reliance placed
upon the advice contained herein since practical
expertise and site conditions are outside of our control.
Neither do we accept liability for the performance of
the product arising from such use. This does not affect
your statutory rights.
Fired Earth is a trading name of Aga
Consumer Products Limited. Registered
in England and Wales under Registered
Number 3872754. Registered Office
Address - 4 Arleston Way, Shirley,
Solihull B90 4LH.
Glossary
BTU’s - (British Thermal Units) the
measurement used to calculate the required
heat for a particular room to reach the
recommended temperature. The heat
source/s within a room must provide this
amount of heat as a minimum.
Guarantee – 10 years for the mats provided
installed correctly and not physically
damaged 1 year for any electronic
controls/switches etc
IEE – Institute of Electrical engineers
Insulation – a product which prevents
heat loss, but which must be sufficiently
rigid for tiling
Programmable Thermostat – reading the
temperature of the air or the floor
depending on the chosen system, the
thermostat can be programmed to switch
the system on and off by time and also
by temperature.
RCD – residual current device –shuts of the
supply when a fault is detected reducing
the risk form electric shock
Sole source heating – it is not always
possible to sufficiently warm all rooms at
all times of the year with this type of
heating. Various specifications of the
room/s to be heated will be required to
confirm the required BTU’s and therefore if
sufficient quantities of the mats can be
installed to produce the heat required.
Watts – measurement of energy, 1000
watts is equivalent to 1kw.
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