Heat output tables
The tables below shows typical performance data for the
various Polypipe under floor heating systems.
Solid Floor
Suspended and Floating Floor
Overlay™ and Overlay™ Lite
MHP System
48
49
General system information
Many of the components within Polypipe under floor heating
systems are drawn from our well established Polyplumb system
of pipes and plumbing fittings. Polyplumb is suitable for use
in hot and cold water supply and both radiator and under floor
heating systems. Polypipe polybutylene pipe provides flexibility
and freedom when designing pipe layouts, whilst Polyplumb
push fit fittings are fast to install and secure in use.
Strength
The Polyplumb system is suitable for use in working applications
up to 12 bar / 20°C (6 bar / 90°C). Pipes are suitable for bending
to a radius of 12 x diameter when unsupported or 8 x diameter
when supported.
Connections and fittings are tested to BS 7291: Class S for
thermal cycling test, long term pressure tests, rapid pressure
test and pull-out strength.
System malfunction
temperature
Polyplumb pipes and fittings are tested to BS 7291: Parts 1 and 2,
which incorporates a pressurised thermal cycling test and a test
regime at temperatures of 114°C and 3.5 bar pressure for 1,000
cycles at a duration of 30 minutes per cycle. See British Standards
website for further details.
Gases
The Polyplumb pipe system is not suitable for the transportation
of gases.
Standard Polypipe polybutylene pipe is oxygen permeable and
is only suitable for all domestic water and heating installations.
Polypipe recommends that corrosion inhibitors are introduced to,
and maintained in, all heating systems, whether they use standard
or barrier pipe. Due to the long pipe runs used in under floor
heating systems, we recommend barrier pipe is used throughout
to minimise the potential for oxygen ingress into the system.
Light
Polyplumb pipe and fittings should be protected from UV light.
Standard decorating paints form adequate protection. Polyplumb
pipe insulation forms adequate protection for external use. All Polypipe
polybutylene pipe is delivered in light-protective packaging.
Thermal
The co-efficient of thermal expansion of Polypipe polybutylene
pipe is 1.3 x 10
-4
m/mºC. It accommodates expansion by its
modulus of elasticity.
Maintenance
Polypipe systems require no maintenance, other than checks
on the inhibitor level in heating systems.
Water
The polybutylene material used in Polyplumb pipes and fittings
is WRC / WRAS approved. It is resistant to the build-up of scale.
Short term chlorination for disinfection of supply pipe work and
normal levels of chlorine in UK domestic water supplies will not
have an adverse effect on the integrity of the pipe. Polypipe pipe
is not suitable, however, for systems that carry a high concentration
of chlorine, for example supplies to swimming pools.
Acoustic
The flexibility of Polypipe polybutylene pipe provides better
acoustic performance than rigid pipe systems in terms of low
noise transmission and low water hammer effect.
Electrical
As Polypipe polybutylene pipe does not conduct electricity,
installations generally require less equipotential bonding than
metal systems. Both the IEE and the IoP give guidance on the
earth bonding requirements of plastic pipe systems.
Where Polypipe polybutylene pipe breaks the continuity
of existing metal pipe, which may be used for earthing
or bonding, this continuity should be reinstated by affixing
permanent earth clips and a section of earth cable between
the ends of the copper pipe.
Side-effects
Polypipe believes there to be no side-effects from handling or
using its pipes and fittings.
Compatibility
Polypipe polybutylene pipe connects to rigid pipe systems and
is compatible with all recommended inhibitors.
For details of compatibility with specific building materials, such
as filler foam and wood worm treatments, please consult the
Polypipe Technical Hotline on
01709 770000
.
Polypipe pipes and fittings can be painted using emulsion
or undercoat and gloss. Cellulose based paints, strippers or
thinners must not be used.
Durability
Polypipe floor heating products, excluding manifolds and
control products, are
guaranteed for 50 years
against defects
in materials or manufacture from the date of purchase
(exclusions apply). Visit
www.ufch.com
to a view a full copy
of our current guarantee(s).
TECHNICAL DATA
TECHNICAL DATA
40
100
60.9
25.7
45
100
76.2
27.0
50
100
91.6
28.3
55
100
95.0
28.6
40
200
50.8
24.9
45
200
63.6
26.0
50
200
76.3
27.0
55
200
77.0
27.2
40
300*
42.8
24.2
45
300*
53.6
25.1
50
300*
64.3
26.0
55
300*
66.7
26.9
Mean water
Pipe
Output
Surface floor
temperature °C
spacing mm
W/m
2
temperature °C
40
150
61.0
25.8
45
150
68.0
26.3
50
150
79.0
28.1
55
150
101.0
30.1
60
150
124.0
32.0
Mean water
Pipe
Output
Surface floor
temperature °C
spacing mm
W/m
2
temperature °C
40
90
52.0
25.0
45
90
64.0
26.0
50
90
76.0
27.0
55
90
100.0
29.0
60
90
124.0
31.0
Mean water
Pipe
Output
Surface floor
temperature °C
spacing mm
W/m
2
temperature °C
40
225/300
31.7
23.1
45
225/300
40.2
23.9
50
225/300
49.2
24.7
55
225/300
50.0
24.8
60
225/300
52.3
25.0
Mean water
Pipe
Output
Surface floor
temperature °C
spacing mm
W/m
2
temperature °C
