UNDERFLOOR & RENEWABLES
for conservatories, extensions & single rooms
design innovation expertise service
natural warmth a better kind of warmth
More and more homeowners are Warming from the ﬂoor up is more
appreciating the beneﬁts of modern comfortable – it feels natural because it is
warm water underﬂoor heating. the way you are warmed by the sun.
Heating from the ﬂoor improves comfort, Radiators heat the air by convection,
there is no intrusion on wall or ﬂoor space drawing cold air across the floor and up to
and running costs are kept low. the ceiling. In contrast, underfloor heating
produces mainly radiant warmth. The
Now conservatories, extensions or single
entire floor is heated meaning warmth is
rooms, can all enjoy the quality of a
released evenly causing no stuffiness,
Nu-Heat underﬂoor system, condensed
draughts or cold spots. Feet are gently
into a simple-to-install package – onezone®.
warmed whilst the head is cool – ideal
onezone® integrates seamlessly with any comfort conditions.
existing radiator system. It is designed and
The gentle, even heat and low humidity
produced to exacting standards that have
variations create a kinder environment for
led to Nu-Heat becoming the leading supplier
furniture, antique or modern and the
of warm water underﬂoor heating systems in
circulation of dust and mites is reduced
the UK. Since 1992 we have successfully
making the air cleaner and less allergenic.
designed and supplied over 20,000 homes
with bespoke underﬂoor heating systems.
from Nu-Heat is the leading underfloor
heating solution for:
onezone® can be integrated into any
existing heating system, quickly and easily;
allowing improvement and enhancement of
the home heating system.
onezone® is tailored to each room – it
is not one-size-fits-all. The pack arrives
complete with all controls and with the
correct amount of flexible Fastflo® floor
heating tube and clips for each individual
project. The installation instructions are
comprehensive and fully illustrated.
Installing the Fastflo® tube into the
floor construction is a simple process.
Both screed and floating floors are
the basic principle
Underfloor heating works by pumping
temperature controlled warm water from
a normal central heating boiler, through
jointless plastic tubing embedded in
The floor temperature needs to be raised
only a few degrees above the room
temperature to maintain an effective
The onezone® control unit carefully blends
the water from the existing boiler to the
correct temperature for entry into the floor.
A simple wall-mounted thermostat ensures
complete comfort control.
Nu-Heat applies the same
high quality standards
to onezone as it does to
full house systems
onezone® design features fastflo® floor heating tube performance
warm water control A onezone® pack contains Fastflo® Nu-Heat onezone® can provide heating of
A well designed floor heating system polyethylene floor heating tube with up to 100 Watts per square metre of floor
maintains a comfortable floor temperature oxygen barrier, (PE-Xc). area. This is normally more than sufficient
to provide room temperature without
through accurately controlling the water Fastflo® is fully compliant with all relevant
supplementary heating. However, caution
temperature entering the floor. With Nu-Heat British and European standards and delivers
should be exercised to ensure that the heat
onezone®, water is taken from the existing outstanding heating performance:
output from the flow will meet the heat
heating system, passed through the control
• Smaller diameter – enables shorter coil loss of the structure in extreme weather
unit and then pumped directly to the Fastflo®
lengths and closer spacing so warmth is conditions, especially in highly glazed areas
underfloor heating tube.
spread more evenly, such as conservatories.
Nu-Heat applies the same high quality
• Faster response times – rooms heat Heating response times in screed floors will
standards to onezone® as it does to
quickly and more efficiently, be longer than for radiators but this can
easily be allowed for by appropriate setting
• Quick installation – due to the flexibility
The onezone® control unit arrives complete of the time controls.
of the pipe, thereby reducing installation
with fill and drain points as well as its own
temperature and pressure gauges. Simple
push-fittings enable the system to be quickly
and easily integrated into the existing heating
and control circuits with minimal disruption
and reduced installation cost. Standard
15mm push-fit connections with plastic or
copper pipe can be used.
For independent room heating,
Programmable onezone® connect onezone® where it will
room thermostat control unit not be affected by existing controls
To allow the existing heating to
® control onezone®, connect into
onezone the system where convenient
Existing radiator circuit
room temperature and timing
Nu-Heat onezone® provides two alternative
ways of controlling the times at which
warmth is available in the room.
Plumb from the existing radiator system
and use the existing heating timer as the
master control. The programmable thermostat
supplied with onezone® will be able to call
for heat in the room during the times set
on the main timer, but not at other times.
The room heating will switch off when
the correct temperature is reached within
Bypassing existing system controls to give
independent control over the underfloor
heating system. Ideally, independent Nu-Heat onezone®
control should always be the preferred can be controlled from the
option. However this is dependent on
the location of the room in relation to the
existing heating timer
existing system. or independently
installing onezone® – nu-heat service and support
We believe that our systems should be simple and quick to install regardless of technical
knowledge – they are designed to enable trouble-free first time installation.
Nu-Heat installation manuals are clear, concise and praised for their clear approach.
Telephone and email support from the experienced Nu-Heat technical support staff is
1. Place edge insulation around the sides 2. Lay insulation over the concrete base 3. Fix cliptrack across the floor
of the room
4. Lay the Fastflo® floor heating tube 5. Fit the onezone® control unit in a 6. Screed the floor
suitable place, connect the Fastflo® tubing
and pressure test
The majority of new-build extensions and
conservatories have screed floors ideal for
underfloor heating as screed gives efficient
heat transfer. New flooring can be laid on
top of the screed as normal.
Sand & cement screed
Polythene protection layer
Fastflo® in screed with Cliptrack™
This floor construction is popular for
extensions and will be found in many
renovation projects. Nu-Heat supplies
a heat diffuser plate attached to a thin
polystyrene layer which can be laid on
top of the standard insulation layer. The
plates are fitted across the room and the
Fastflo® tubing is pushed into them.
The chipboard or final timber floor deck
is laid directly on top of the panels making
installation very straightforward.
EHD polystyrene with heat
(Concrete or timber deck)
Fastflo® with diffuser panels in floating floor
The purpose of insulation in the floor of
any building is to prevent downward heat
losses, whether it has underfloor heating
The insulation level specified within current
Building Regulations is perfectly suitable
for Nu-Heat underfloor heating, therefore
no additional cost is incurred.
In renovation and refurbishment projects
with no insulation at all, the floor insulation
will have to be increased broadly in line
with modern standards. It is Nu-Heat policy
not to recommend any underfloor heating
scheme over an existing floor unless
sufficient insulation can be provided to
prevent wasteful downward heat losses.
In screed floors the insulation layer should
be on top of the concrete base slab or
beam and block subfloor, not beneath it.
The Fastflo® floor heating tube is secured
directly to the insulation layer with cliptrack.
The screed, normally of 65mm depth, is
laid and levelled over that.
As part of the onezone® package Nu-Heat
supplies edge insulation to allow for the
thermal expansion of the screed. Additional
edge insulation may be required to prevent
location of the components
The control unit can be fitted directly into
the room to be heated or in a convenient
place elsewhere in the building, for example
an airing cupboard or utility room.
The room temperature thermostat can be
conveniently ﬁtted by the light switch.
The insulation level specified within current
building regulations is perfectly suitable
for nu-heat underfloor heating, therefore
no additional cost is incurred
A wide range of ﬂoor coverings may be used.
For optimum performance hard surfaces
such as ceramic tiles, slate, stone and marble
are recommended as they provide the best
transfer of heat.
The low surface temperature of underﬂoor
heating presents no problem with timber
ﬂoors provided that the timber is well
seasoned or kiln-dried and sensible
procedures are followed to prevent timber
from absorbing moisture from the building.
Although all carpets resist heat transfer
more than other coverings, if simple
guidelines are followed the efﬁciency of
underﬂoor heating will not be affected.
Very thick carpet with a high tog value
and felt underlays should be avoided.
The combined value of carpet and underlays
should not exceed 2.5 tog.
As part of our ongoing dedication to 100%
customer satisfaction, Nu-Heat will be
happy to advise on any aspect of ﬂoor
a wide range
can be used
The Nu-Heat onezone® price includes the following:
1. A control unit consisting of: ﬂoor heating pump, temperature gauge, zone actuator,
water temperature control valve, manual bypass valve, pipe manifold connectors,
drain-offs, hose connectors, leak-proof caps, distributor assemblies. Fastﬂo® ﬂoor
heating tube, cliptrack (or heat diffuser plates if appropriate), programmable room
thermostat and onezone® wiring centre.
2. Installation manual with full instructions, schematics, wiring diagrams, ﬂoor constructions
and system settings.
3. Telephone installation and technical support.
4. Delivery by carrier.
The only components needed to complete the installation are electrical cable and pipework
from the onezone® control unit to the heating circuit.
The Nu-Heat onezone® package can be supplied direct to you within just a few days.
This can be obtained in a number of ways:
• On-line ordering at www.nu-heat.co.uk/onezone. 5% preferential discounts apply
when ordering via the internet using the discount code OZ5%.
• Telephone to discuss your project on Freephone 0800 731 1976.
• By Freepost, complete the enclosed order form and return to Nu-Heat.
by ordering online
UNDERFLOOR & RENEWABLES
Heathpark House, Devonshire Road,
Honiton, Devon ex14 1sd
Tel: 01404 549770
Fax: 01404 549771