Pipe in Floor System Planning
As there is a large amount of latitude in the positioning of the pipes,
the measurements of the rooms need not be exact, however accurate measurement
is suggested to enable correct provision of the insulation material and
pipe support grids.
The following procedure is recommended:
1. Determine the best position of the manifold to allow the most
direct runs to the heating circuits.
2. Allow sufficient room for the flow and return pipes to the heated
area.
Remember that the pipe spacing should be similar to the spacing required
for the area that it is running through. Too close a spacing may generate
over-heated areas! If an area has to have a large number of pipes closer
together than is desirable, then some pipes may require covering with
insulation tubing.
3. Divide the heating circuits according to individual rooms or
zones
4. From the calculation tables find out the pipe spacing and length
of pipe, add to the
pipe length the distance from the manifold to the heated room or zone,
this will give the total amount of pipe required for the heating circuit.
To find total heat output multiply the area by the Watts/m2 and add 5
watts for every metre of connecting pipe.
Manifold Connection Area
Pipes connecting with the heating circuit manifold will of necessity be
placed very close together. These connecting pipes also produce heat!
Should these pipes produce a heat output or surface temperature which
is in excess of the requirements for the particular room, the appropriate
sections of piping should be covered using tubular insulating material.
Avz5 mesh grid may be used in front of the manifold if desired to reduce
the pipe spacing.
Note on calculations:
The calculafion method given above is very basic, the full calculations
and material
quantity calculations would normally be carried out by us to suit each
heating project, the details given here are for information only.
Heatloss calculations and room temperature specifications are as laid
down in the C.I.B.S guide and the Velta calculations are carried out using
the Velta Pipe in floor calculation computer program which may be inspected
if required.
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