Analysis of Window Components Affecting U-Value Using Thermal Transmittance Test Results and Multiple Linear Regression Analysis

Table 1

Examples of U-value test results and window components.

Specimen number	Frame material	Window opening type	Single or double window	Frame width (mm)	Glazing detail (material and thickness (mm))	Spacer material	U-value (W/m^2K)	Test date (yy.mm.dd)
1	Stainless steel and aluminum	Swing	Double	100	Low E 6 mm-argon gas 16 mm-clear 6 mm	PVC	1.794	2015.03.25–03.26
					Low E 6 mm-argon gas 12 mm-clear 6 mm
2	Aluminum	Swing	Single	150	Clear 6 mm-air 12 mm-low E 6 mm	PVC	2.688	2015.01.30–01.31
∼532	Aluminum	Fixed	Single	180	Low E 6 mm-argon gas 14 mm-clear 5 mm-argon gas 12 mm-low E 5 mm	PVC	0.9165	2016.04.22–04.22