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I The value of the seasonal space heating energy efficiency of the preferential space heater, expressed in %.
II The factor for weighting the heat output of preferential and supplementary heaters of a package as set out in the
following table.
III The value of the mathematical expression: 294/(11xPrated), whereby Prated is related to the preferential space
heater.
IV The value of the mathematical expression 115/(11 Prated), whereby Prated is related to the preferential space
heater.
Psup / (Prated + Psup)
(1)(2)
II, package without hot water storage tank II, package with hot water storage tank
00 0
0,1 0,30 0,37
0,2 0,55 0,70
0,3 0,75 0,85
0,4 0,85 0,94
0,5 0,95 0,98
0,6 0,98 1,00
> 0,7 1,00 1,00
(1) The intermediate values are calculated by linear interpolation betw een the tw o adjacent values.
(2) Prated is related to the preferential space heater or combination heater.
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