MSC Quarterly: Choosing Energy-Efficient Windows: Glaziers in Focus

The thermal performance of windows and choosing the right glazier are critical factors in achieving a 7-Star Energy Rating.

High-performance glazing can greatly enhance energy efficiency, lower heating and cooling costs, and contribute to a more comfortable living environment.

When selecting a glazier, make sure they offer a range of high-performance glass options that meet your Energy Rating requirements. In this blog, we compare the thermal performance of some leading Australian window manufacturers, focusing on the specific needs of Victorian climate zones.

As a guide, the table below highlights key Victorian glaziers and the performance range for some of their glazing options. The different series and glass/tint combinations result in varying U-values.

Comparative Overview

Brand	Series	Glass	U-Value range (Uv / SHGC)
			3.8 - 3.0	2.8 - 2.0	1.8
A&L	Standard	Double Glazed (Clear)	3.5/.54
		L/B		2.8/.42
		Double Glazed (Low-e)		2.5/.39
		Best Double Glazing		2.5/.41
		TB Sash			1.8/.40
AWS	516	Double Glazed (Clear)	3.6/.50
	516	L/B	3.5/.43
	516	i89 Dbl	3.2/.41	2.6/.34
	755 (Emb)	i89		2.1/.43
Bradnams		Double Glazed (Clear)	3.7/.43
		L/B	3.3/.42
		i89 Dbl	3.2/.40	2.0/.39
Dowell	Elite	Double Glazed (Clear)	3.9/.58
		L/B	3.0/.45
		Dbl H/C			1.8/.46
Southern Star	100	Double Glazed (Clear)	3.8/.58
	100	L/B (ET)	3.1/.50
	150	LB		2.5/.46
	150	i89 Dbl		2.5/.46
	350	i89 Dbl		2.5/.46
Stegbar	Residential	Double Glazed (Clear)
		L/B	3.1/.45
		Double Glazed (Low-e)	3.0/.41
		Best Double Glazing	3.0/.43	2.0/.40
Trend	Synergy	Double Glazed (Clear)
		L/B	3.3/.45
		Double Glazed (Low-e)	3.0/.41
		Best Double Glazing	3.0/.44	2.0/.40