EcoDan Installation Manual Version 1.0 (26/01/09) Ice Energy Heat Pumps Ltd © 2008
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ESTIMATING THE VOLUME OF WATER SYSTEMS
Useful conversion factors:
1kW :
3,412
BTU's
1m3 :
1000
litres
4.546 litres
:
1 gallon
The following guide to estimating system volumes has been developed from field
experience over many years. Multiply the boiler output rating in kWs by the figure given
below for the relevant type of system to give an estimate of the total system volume.
Commercial systems (pressurised):
Systems comprising of perimeter heating,
convectors, etc.
: 6
litres/kW
Ventilation systems (air handling units, fan
coils, etc.)
: 8
litres/kW
Steel panel radiators
:
11 litres/kW
Cast iron radiators
:
14 litres/kW
'Distant' heating systems in large sprawling
buildings
: 20
litres/kW
Underfloor heating
:
23 litres/kW
Domestic systems:
All small & microbore domestic
installations
: 6
litres/kW
Allow an additional 10% (multiply by 1.1) for open vented systems of all types.
