Danfoss Basic Heating Systems Compendium

MAKING MODERN LIVING POSSIBLE

Basic™ Heating Systems

DANFOSS HEATING SOLUTIONS Handbook

Handbook Basic™ Heating Systems

2

VGCTB202 © Danfoss 10/2009

Handbook Basic™ Heating Systems

Index

Page

Underfloor heating with heated screed as liquid or cement screed . . . . . . . . . . . . . . . . . . . . . 4

Basic heating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Relevant standards for underfloor heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Minimum thermal resistance of insulation

under floor heating systems from EN 1264, Part 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

BasicRail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

BasicClip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

BasicGrip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Basic insulation overlap panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Floor constructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Basic perimeter insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Tanking for liquid screed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

BasicRail - types of installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Application sheet - BasicRail, Room with floor meeting window. . . . . . . . . . . . . . . . . . . . . . . 9

BasicClip and BasicGrip - types of installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Application sheet - BasicClip, Conservatory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Application sheet - BasicGrip, Conservatory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Advice on installing BasicGrip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Too ls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Installation times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Heated screed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Danfoss screed additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Screed joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Movement gap strips for BasicRail and BasicClip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Important! Before and after installation of screed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16+Heating up screed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Active load and height of screed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Categories of loaded areas, in accordance with EN 1991 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Minimum nominal thickness in mm for active loads in heated screed with Basic heating systems. . 17

After installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Information for finished floors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Thermal resistance R

of different finishes fully bonded to the floor . . . . . . . . . . . . . . . . 18

finished flo or

Output tables, BasicRail heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Output tables, BasicClip and BasicGrip heating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

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Handbook Basic™ Heating Systems

Underfloor heating with
heated screed as liquid
or cement screed

Basic heating systems

Advantages

Underfloor heating, with its low supply tempera­ture, has many advantages. It runs maintenance­free, is energy saving and ensures comfortable
room temperatures.
Rooms with underfloor heating allow greater
freedom for interior design. The Danfoss FH pipes
enclosed in cement or liquid screed give off

The Danfoss underfloor heating systems with
heated screed - Basic heating systems - are low
temperature underfloor heating systems suitable
for all new buildings. They can be installed in all
rooms and floors of blocks of flats or in business
premises.
The grey Danfoss composite pipes are installed,
according to worked out distances, using
BasicClip, BasicGrip or BasicRail on insulation
panels giving the pipe lay-out. The water flowing
though the composite or PE-RT pipes gently
warms the screed which works as heating
element. It is possible to lay all common floor

• Low energy saving temperature

• Cost eective, no additional costs

• 100% impervious to air, no heat exchanger

necessary

• Comfortable, clean and healthy air

• Greater freedom of interior design, more living

space for whole family

• Maintenance-free

comfortable warmth without any drafts, - creating
a dustfree, hygenic environment.

coverings on top of Danfoss underfloor heating,
except perhaps heavy exotic carpets or special
engineered wood flooring which would need
extra calculations when planning the system.
Since low water temperatures are required to
achieve the required room temperatures, Danfoss
underfloor heating systems are ideal for use with
boilers, solar energy and heat pumps. This means
that producers of energy saving heat will find an
ideal partner in underfloor heating.

Relevant standards for
underfloor heating

The following regulations and EN Standards
should be observed when planning and installing
floor heating:

EN 1991 Action on structures

EN 1264 Underfloor Heating, Systems and

Components

DIN 4109 Sound Insulation in the Building
Industry

ISO EN 140-8 Measurement of sound insulation
in buildings and building elements

EN 13813 Screed Material and Floor Screeds

Local building regulations.

Professional information on interface co-ordination
when planning heated underfloor construction
(ref: BVF).

For underfloor heating the EN 1264, part 4
standards are applicable.
Three Danfoss basic constructions are possible:
A, B and C.
They meet the minimum insulation requirements
in relation to use and position in the house.

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Handbook Basic™ Heating Systems

Minimum thermal
resistance of insulation
under floor heating
systems from EN 1264,
part4

BasicRail

Construction A B C

Heated room

below

Thermal
resistance
(m K/W)

* When groundwater table is < 5 m this value should be raised!

The composite pipes are clipped onto the BasicRail
self-adhesive clip rails at regular distances.

The maximum of 2 m between the clip rails should
only be applied when using cement screed.
When using liquid screed a maximum distance of
1m should be observed. Because of the fluid
consistency of liquid screed it could run under
the pipes and can push them upwards.

0.75 1.2 5 1.2 5 1.5 2

Unheated or
occasionally

heated room

below or
room on

ground floor*

Outside air temperature below construction

Design

outside

temperature

Td > 0° C

In accordance with EN 1264 Danfoss FH pipes
should be laid more than

• 50 mm away from vertical construction, such as

walls

• 200 mm from chimneys and open re places,

open and walled-up shafts, as well as lift shafts

Design

outside

temperature

0° C > Td ≥ -5° C

Design

outside

temperature

-5° C > Td ≥ -15° C

BasicClip

BasicGrip

The BasicClip System is a tacker system where the
pipes are tacked onto the insulation with u-shaped
tacker pins. The insulation overlap panels are
supplied as 2 x 1 m pre-folded panels. The foil
clad panels give a perfect grip for the barbs in
the EPS and under the foil.

The grid pattern on the panel foil is 50 mm which
allows the different laying distances to be kept :
100 and 150 mm for Edge Zones, and 200, 250
and 300 mm for Comfort Zones.

Any additional insulation should be laid under
the BasicClip overlap panels.

The BasicGrip panel system consists of deeply
drawn foil with studs that allow perfect laying of
pipes.

With their size of 1 x 1 m, the panels are easy to
lay and can be installed by just one person.

The panels can be cut with the usual cutter knife.
The studded panels facilitate correct pipe
distances. Laying the pipes diagonally is possible
without additional grips. It is safe to walk on the
strong foam studded panels.

When using the BasicGrip panel without thermal
insulation the deeply drawn foil is correspondingly
thicker.

The laying distance is calculated in multiples of
50 mm, so that possible pipe distances in the
Edge Zone are 100 and 150 mm and in the
Comfort Zone 200, 250 and 300 mm are achieved.

Any additional insulation should be laid under
the BasicGrip panels.

BasicClip insulation overlap panels are available
in 2 variations:

• with 35 mm thermal and impact sound

insulation EPS

• with 20 mm thermal and impact sound

insulation EPS

For optimum installation of the system an
expansion profile is available to overcome
expansion gaps and door thresholds.

The system is suitable for liquid (CAF) and
cement screeds (CT).

BasicGrip panels are available in 3 variations:

• with 35 mm thermal and impact sound

insulation EPS

• with 11 mm thermal insulation EPS

• without insulation

For optimum installation of the system, the
following additional products are on offer:

• An expansion prole to overcome expansion

gaps and door thresholds

• Door and manifold panels with varying

insulation thickness

• PE –String to seal perimeter insulation when

using liquid screed

The system is suitable for liquid (CAF) and
cement screeds (CT).

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Handbook Basic™ Heating Systems

Basic insulation overlap
panels

Floor constructions

The individual components of the overlap
insulation panels are bonded and consist of the

Continuous sound impact insulation also has to
be installed.

following layers:

• Bonded multi-layer foil with 5 cm grids to

facilitate exact pipe laying

• A thermal and impact sound insulation layer

made of polystyrene

What type of insulation is used, depends on the
type of floor and the building. If the concrete is
even and free of other installations, a single layer

of insulation is sucient. In 90% of all new

buildings heating, sanitation and electrical
services are installed which require double layer
insulation.

For height adjustment, thermal insulation, e.g.
EPS 035 DEO 20 mm is laid between the pipe
channels and gaps around the pipes are filled
with Danfoss Dry Levelling Compound.

Finally, the Basic insulation overlap panels are
installed. The surface of these 2 m2 (1 + 1 m2
foldable) insulation panels are very strong, safe
to walk on, and form a very good surface for
BasicClip and BasicRail heating systems.
The strong foil is a technically perfect base for
cement and liquid screeds.

A: Floor construction above rooms of equal use/ temperature; Minimum thermal resistance

R

= 0.75 m2K/W

min

Construction with insulation panels 20/35 mm plus additional insulation:

Insulation panels 20/35 mm
R = 0.44 m2K/W; R = 0.77 m2K/W

20 20 20 20 35 35 35 35 mm

+ + + + + + + +

EPS DEO λ =0.040 W/mK 20 - mm

EPS DEO λ=0.035 W/mK 20 - mm

PUR λ=0.030 W/mK 20 - mm

PUR λ =0.025 W/mK 20 - mm

Total thermal resistance R 0.94 1.01 1. 11 1.27 0.77 0.77 0.77 0.77 m K/W

Total insulation thickness 40 40 40 40 35 35 35 35 mm

B: Floor construction above occasionally or permanently unheated rooms, cellars or ground-

floor (ground water table > 5 m); minimum thermal resistance R

= 1.25 m2 K/W

min

Construction with insulation panels 20/35 mm plus additional insulation :

Insulation 20/35 mm
R = 0.44 m2K/W; R = 0.77 m2K/W

20 20 20 20 35 35 35 35 mm

+ + + + + + + +

EPS DEO λ = 0.040 W/mK 40 20 mm

EPS DEO λ = 0.035 W/mK 30 20 mm

PUR λ = 0 .030 W/mK 30 20 mm

PUR λ = 0.025 W/mK 30 20 mm

Total thermal resistance R 1.4 4 1. 30 1.44 1.6 4 1.27 1.34 1.43 1.57 m K/W

Total insulation thickness 60 50 50 50 55 55 55 55 mm

C: Construction for floors against outside air; minimum thermal resistance R

= 2.0 m2 K/W

min

Construction with insulation panels 20/35 mm plus additional insulation:

Insulation 20/35 mm
R = 0.44 m2K/W; R = 0.77 m2K/W

20 20 20 20 35 35 35 35 mm

+ + + + + + + +

EPS DEO λ = 0.040 W/mK 70 50 mm

EPS DEO λ = 0.035 W/mK 60 50 mm

PUR λ = 0 .030 W/mK 50 40 mm

PUR λ = 0.025 W/mK 40 40 mm

Total thermal resistance R 2 .19 2 .16 2 .11 2.04 2.02 2.2 2.1 2.37 m K/W

Total insulation thickness 90 80 70 60 85 85 75 75 mm

λ = Thermal conductivity in W/mK.

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Handbook Basic™ Heating Systems

Thermal resistance

R

Insulation

Insulation thickness in (mm)

Thermal resistance in (W/mK)

[

d

=

λ

Other combinations are possible to achieve
certain built-up heights. The following table
indicates the thermal resistance of the different
insulations, dependent on their thickness.

EPS 045 DES EPS 040 DEO EPS 035 DEO PUR λ = 0.03

Thickness

[mm]

10 0.22 10 0.25 10 0.29 10 0.33 10 0.40

]

15 0.33 15 0.38 15 0.43 15 0.50 15 0.60

20 0.44 20 0.50 20 0. 57 20 0.67 20 0.80

25 0.56 25 0.63 25 0.71 25 0.83 25 1. 00

30 0. 67 30 0.75 30 0.86 30 1.00 30 1. 20

35 0.78 35 0.88 35 1.0 0 35 1.17 35 1. 40

40 0.89 40 1. 00 40 1 .14 40 1. 33 40 1. 60

45 1. 00 45 1.13 45 1. 29 45 1. 50 45 1. 80

50 1 .11 50 1. 25 50 1.43 50 1.67 50 2.00

55 1.2 2 55 1. 38 55 1. 57 55 1.8 3 55 2.20

60 1. 33 60 1. 50 60 1.7 1 60 2.00 60 2.40

65 1. 44 65 1. 63 65 1. 86 65 2 .17 65 2.60

70 1. 56 70 1.75 70 2.00 70 2.33 70 2.80

75 1.67 75 1. 88 75 2 .14 75 2.50 75 3.00

80 1.78 80 2.00 80 2.29 80 2.67 80 3.20

85 1. 89 85 2.13 85 2.43 85 2.83 85 3.40

90 2.00 90 2.25 90 2.57 90 3.00 90 3.60

95 2 .11 95 2.38 95 2.71 95 3 .17 95 3.80

100 2.22 100 2.50 100 2.86 100 3.33 10 0 4.00

105 2.33 105 2.63 105 3.00 105 3.50 10 5 4.20

110 2.44 11 0 2.75 11 0 3.14 110 3.67 11 0 4.40

115 2.56 115 2.88 115 3.29 115 3.83 115 4.60

120 2.67 120 3.00 120 3.43 120 4.00 120 4.80

125 2.78 125 3.13 125 3.57 125 4.17 125 5.00

130 2.89 130 3.25 130 3 .71 13 0 4. 33 130 5.20

135 3.00 135 3.38 135 3.86 135 4.50 135 5.40

140 3. 11 140 3.50 14 0 4.00 14 0 4.67 140 5.60

145 3.22 145 3.63 145 4 .14 145 4.83 145 5.80

150 3. 33 150 3.75 150 4.29 15 0 5.00 15 0 6.00

155 3.44 155 3.88 155 4.43 155 5 .17 155 6.20

160 3.56 16 0 4.00 16 0 4.57 16 0 5.33 160 6.40

165 3.67 165 4.13 165 4.71 165 5.50 165 6.60

170 3.78 170 4.25 170 4.86 17 0 5.67 17 0 6.80

175 3.89 17 5 4.38 17 5 5.00 175 5.83 175 7. 00

180 4.00 18 0 4.50 18 0 5.14 180 6.00 180 7. 2 0

185 4. 11 18 5 4.63 185 5.29 185 6 .17 18 5 7. 4 0

190 4.22 190 4.75 190 5.43 190 6. 33 190 7. 6 0

195 4.33 195 4.88 19 5 5.57 195 6.50 19 5 7. 80

200 4.44 200 5.00 200 5.71 200 6.67 200 8.00

R

insulation

[m K/W ]

Thickness

[mm]

R

[m K/W ]

insulation

Thickness

[mm]

The final layer should always be the Basic
insulation overlap panels 20/35 mm to guarantee
a stable base for further installation.

W/mK PUR λ = 0.025 W/mK

R

[m K/W ]

insulation

Thickness

[mm]

R

insulation

[m K/W ]

Thickness

[mm]

R

insulation

[m K/W ]

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Handbook Basic™ Heating Systems

Basic perimeter
insulation

Tanking for
liquid screed

BasicRail

- types of installation

The Basic Perimeter insulation 150 mm consists of
8 mm PE-Foam. The double-sided adhesive tape
on the back allows it to be easily attached to the
wall. The adhesive tape on the room side of the
foil attaches the perimeter insulation to the
insulation panels.
In accordance with EN 1264 the perimeter
insulation can be compressed by 5 mm and thus,

When using liquid screed the insulation joints
should be taped over to accept screed with a
very thin consistency.

The heating circuits are laid in meander form,
which is an advantage when first installing the
pipes in the edge zones of the room (Edge Zone)
and then taking them to the centre of the room
(Comfort Zone): the warmer temperatures of the
heating circuit arrive at the outer zones (higher
floor temperature), and the cooled down water
heats the central zone (lower floor temperature).

together with the insulation panels, forms the
required tank for the screed as well as thermal
and sound bridges.
When using a double layer of insulation, the
additional insulation should be laid first. Should
their thickness exceed 5 cm, the perimeter
insulation is installed on top of the additional
insulation.

To achieve higher output around the edges or in
front of windows, you can lay the pipes in double
pattern.
Please see recommended layout patterns in
Danfoss application sheets.

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Handbook Basic™ Heating Systems

Legend

FH Composite pipe
CC CZ 2 = 250 mm

Flow

BasicRail
Distances bet ween rails:
Liquid screed 1.00 m
Cement screed 1.50 - 2.0 0 m

FH Composite pipe
CC EZ 1 = 88 mm

Return

Perimeter insulation

Application Sheet

BasicRail
Room with floor meeting window

Danfoss HES VA.CT.H1.02 © Danfoss 11/2008 1

Heating circuit 1

Heating circuit 2

Application sheet

BasicClip and BasicGrip

- types of installation

The Danfoss wet systems BasicGrip and BasicClip
are laid in spiral form.
The Danfoss composite pipe is laid in spiral form
starting from the edge, leading to the centre of
the room. The pipe distance is twice that of the
calculated pipe spacing. The pipe is then led out
of the centre between the installed pipes.
The advantage is that pipes of higher tempera­ture are next to those of lower temperature, thus

VGCTB202 © Danfoss 10/2009

producing an even surface temperature (higher
output).

Edge Zone: if a higher heat output is required,
the pipes in the Edge Zone (up to 1 m from wall)
can be laid closer, thus producing a higher
surface temperature.

9

Handbook Basic™ Heating Systems

Legend

Pipe layout EZ 100
CC = 100 mm

Supply BasicClip clip,

2 clips per meter

Return

Pipe layout CZ 200
CC = 200 mm

Perimeter insulation

Application Sheet

BasicClip
Conservatory

Danfoss HES VA.EK.B1.02 © Dan foss 11/2008 1

Heating circuit 1

Heating circuit 2

Application sheet

10

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Handbook Basic™ Heating Systems

Legend

Pipe layout EZ 100
CC = 100 mm

Supply BasicGrip panel

Size: 1 x 1 m

Return

Pipe layout CZ 200
CC = 200 mm

Perimeter insulation

Application Sheet

BasicGrip
Conservatory

Danfoss HES VA.EL. A1.02 © Danfoss 11/2008 1

Heating circuit 1

Heating circuit 2

Application sheet

VGCTB202 © Danfoss 10/2009

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