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Climate Zones

The decision for the glazing is based on the orientation of the window and the climate zone your project is planned in. In hot climates it is more important to improve the cooling and in cold climates it is more important to improve the heating. The glass options together with Miglas’ energy efficient frame offers the right solution.

WERS divides Australia into 3 climate zones. Compared to other window manufactures the major advantage of the Miglas range is that all options perform well on both ends of the scale — regardless of the climate zone.
The energy efficient frame provides the base for all year round comfort that can cater for the weather extremes. High performance glass options enhance the performance depending on the climate zone.

With Miglas you are prepared for the hot and the cold days, regardless of the climate zone.
Summer or Winter. We will help you.

Zones - Characteristics & Applications

In cold climates it is important to retain heat in the home and maximise free solar energy gain (high SHGC) and improve other insulation to minimise the heat loss (low U-Value).

  • Low U-Value
  • Low Conductive Frame
  • Low Air Infiltration
  • High SHGC

In cold regions the window schedule should consider that large west-facing windows may contribute to short-term overheating in summer. Glazing with a high solar heat gain coefficient must be used with caution on ńorth facing windows. The penalty of summer overheating could offset the winter advantage when shading is not provided.

Passive Design could mean that clear double glazing allows heat gain combined with thermal mass, i.e. concrete slab, to use the winter sun but shading must be provided in summer.

Typical areas are VIC (Melbourne, regional Victoria), ACT, TAS (all), parts of SA (e.g.Adelaide) & New Zealand.

The priority in a mixed climate is to keep heat out of the home, except during a relatively mild winter season, when 'free' solar heat gain and retention of warmth in the house become important.

  • Low air infiltration
  • Low U-Value
  • Low conductive frame
  • SGHC mix depending on elevation

In mixed regions the window schedule obtains the best results from windows that insulate well (low U-value), admit free solar energy (high SGHC) on the north during cooler months, but limit solar heat gain from the east & west (low SGHC).

This means you should consider different glazing solutions for each elevation & low conductive frames on all windows.

Typical regions with this climates are VIC (Northern Parts), NSW (Sydney), WA (Perth, Southern regions), SA (north & west)

The priority in hot climates ([sub]- tropical or hot arid) is to keep unwanted heat out of the home.

  • Low SHGC
  • Low conductive frame
  • Low U-Value
  • Low Air Infiltration

The window schedule should consider that the best results are obtained from windows that limit solar heat gain on all elevations (low SHGC).

Although tropical and subtropical are frequently humid while arid climates are hot and dry, they can all cause the risk of an overheated building at any time of the year. Good insulation (a low U-value) is beneficial, especially if the home is air-conditioned.

NT, WA (north), QUE, NSW (regional)