Experimental Comparison Between Three Types of Opaque Ventilated Facades

Table 3: Thermal parameters of the ventilated walls.

Thermal Properties	Wall Typology
Thermal Properties	L	IM	EM
Thermal Trasmittance U* (W/(m²K))	0.207 (0.22)*	0.19 (0.20)	0.19 (0.22)
Decrement Factor f	0.07 (0.08)	0.02 (0.04)	0.03 (0.08)
Time Lag Δt (h)	9.7 (8.4)	15.8 (13.9)	14.9 (8.4)
Periodic Thermal Trasmittance Y₁₂ (W/(m²K))	0.014 (0.017)	0.003 (0.07)	0.006 (0.017)
External Areal Heat Capacity k₂(kJ/(m²K))	28 (16)	40 (60)	60 (16)
*thermal parameters between brackets are calculated according to EN ISO 6946:2008 and EN ISO 13786:2008 for well ventilated facades