The answer is in the STARS
This page explains the General WERS Ratings charts that follow on the next pages
Five stars for top performers, one star for lowest.... the WERS star system provides a simple, accurate measure of the efficiency rating of the windows you select.
The stars are not intended to give an exact measure but rather accurate indication within given bands of performance. Often a half star will appear.
The calculations are made using software developed by BRANZ, the Building Research Association of New Zealand.
The stars rate the glass and glazing options used, the different types of frame and the various combinations of both.
FRAMES INCLUDE:
- ALUMINIUM
- THERMALLY BROKEN ALUMINIUM
- COMPOSITE TIMBER AND ALUMINIUM
- TIMBER
- PVC
GLAZING INCLUDES:
- CLEAR GLASS
- TINTED GLASS
- LAMINATED GLASS
- DOUBLE GLAZING OPTIONS
- LOW EMISSIVITY DOUBLE GLAZING
WERS Star Charts
Please select the geographic area for the chart you require:
WERS Star Chart for Zones 1 & 2
WERS Star Chart for Zone 3
WERS STAR RATINGS - All Zones
Condensation
|
Glazing |
Framing |
Condensation Stars |
|
GANZ single grey standard tint |
Aluminium frame |
* |
|
Single Advanced tint |
Aluminium frame |
* |
|
Double grey reflective / clear |
Aluminium frame |
* * |
|
Single clear |
Aluminium frame |
* |
|
Double bronze tint / clear |
Aluminium frame |
* * |
|
Double advanced tint / clear |
Aluminium frame |
* * |
|
Double grey tint / clear |
Aluminium frame |
* * |
|
Double clear laminated / clear |
Aluminium frame |
* * |
|
Double tint / low emissivity |
Aluminium frame |
* * |
|
Double clear |
Aluminium frame |
* * |
|
Double clear / low-e clear |
Aluminium frame |
* * |
|
Double clear / low-e clear + Argon |
Aluminium frame |
* * |
|
|
|
|
|
Single advanced tint |
Composite frame |
* |
|
Single clear |
Composite frame |
* |
|
Double advanced tint / clear |
Composite frame |
* * ½ |
|
Double tint / low-e |
Composite frame |
* * ½ |
|
Double clear |
Composite frame |
* * ½ |
|
Double clear / low-e clear |
Composite frame |
* * ½ |
|
Double clear / low-e clear + Argon |
Composite frame |
* * ½ |
|
|
|
|
|
Single advanced tint |
Thermally broken Aluminium frame |
* |
|
Single clear |
Thermally broken Aluminium frame |
* |
|
Double advanced tint / clear |
Thermally broken Aluminium frame |
* * * |
|
Double tint / low-e |
Thermally broken Aluminium frame |
* * * |
|
Double clear |
Thermally broken Aluminium frame |
* * * |
|
Double clear / low-e clear |
Thermally broken Aluminium frame |
* * * |
|
Double clear / low-e + Argon |
Thermally broken Aluminium frame |
* * * |
|
|
|
|
|
Single advanced tint |
PVC/Timber frame |
* |
|
Single clear |
PVC/Timber frame |
* |
|
Double advanced tint / clear |
PVC/Timber frame |
* * * * |
|
Double tint / low-e |
PVC/Timber frame |
* * * * * |
|
Double grey tint laminated / low-e |
PVC/Timber frame |
* * * * * |
|
Double clear |
PVC/Timber frame |
* * * * |
|
Double clear / low e clear |
PVC/Timber frame |
* * * * * |
|
Double clear / low-e + Argon |
PVC/Timber frame |
* * * * * |