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For the decision which kind of heater and the required heatcapacity the kind and size of the room that needs to be heatedare decisive.The following general rules give you guides for theoften required quick decisions - in case you have a heat requirementcalculation from an architect at hand this one should bepreferred.
For buildings and halls a general rule assumes a max. temperaturerise (difference between the lowest anticipated outdoor temperatureand the highest inside temperature) of 30 K (30°C).For other temperature rises you have to reduce or increase theheat capacity by 17 % for every 5 K (5°C)
Not redeveloped rooms in old buildings or shells before installation of insulation
Oil- or gas heaters:
Volume (m³) x Factor 0,058 = Req. heat capacity (kW)
Electric heaters:
Volume (m³) x Factor 0,041 = Req. heat capacity (kW)
Old buildings with average insulation
Oil- or gas heaters:
Volume (m³) x Factor 0,040 = Req. heat capacity (kW)
Electric heaters:
Volume (m³) x Factor 0,030 = Req. heat capacity (kW)
New buildings with insulation
Oil- or gas heaters:
Volume (m³) x Factor 0.025 = Req. heat capacity (kW)
Electric heaters:
Volume (m³) x Factor 0,020 = Req. heat capacity (kW)
Green houses and tents
For the calculation of the required heat capacity of green housesand tents different to buildings and halls not the room volume butthe entire outer surface should serve as base for the calculation.
This simply because the heat loss of suchconstructions reactsproportional to the outer surfaces.
Green houses and tents without insulation
Oil- or gas heaters:
Outer surface (m²) x Factor 0,0064 x Temp. rise = Req. heat capacity (kW)
Green houses with double glassing and thermo tents
Oil- or gas heaters:
Outer surface (m²) x Factor 0,0037 x Temp. rise = Req.heat capacity (kW)