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What is the t h e r m a l resistance of a 60 cm thick natural stone w al l (X=2.3 W I m K ) , the inside with a 3 cm thick clay plaster X= 0. 8 W / mK is provided? a) Does it meet the minimum thermal protection requirements? b) What is the inner surface temperature for Oi=20°C and Oa=-10°C? c) How high may the relative humidity in the room be, if the rela• tive air humidity on the surface must not exceed 80%?7

What is the thermal  resistance of a 60 cm thick natural stone
wall(X=2.3 WI mK), the  inside  with a 3 cm thick clay plaster X=
0.8 W/mK  is provided?
a) Does it meet the minimum  thermal protection requirements?
b) What is the inner surface temperature for
Oi=20°C and Oa=-10°C?
c) How high may  the  relative humidity in the room be, if the rela•
tive air humidity  on the surface  must not exceed  80%?7
 
 

Grade:12th pass

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