April Lutheran
Glazing U-Factor (W/m2-k)
| Description | Lower | Upper |
|
Single Glazing - including frame |
4.00 | 6 |
| Standard Double Glazing - including frame and sash |
3.01 | 4.01 |
|
Performance Double Glazing - including frame and sash |
2.01 | 3 |
|
Triple Glazing - including frame |
1 | 2 |
|
Triple Glazing (argon filled cavity) - including frame and sash |
0.4 | 1 |
Glazing SHGC
| Description | Lower | Upper |
| Clear Single Glazing | 0.71 | 0.9 |
| Clear Double Glazing | 0.41 | 0.7 |
| Reflective Coated Glazing | 0.21 | 0.4 |
| Glazing with Internal Blinds | 0.1 | 0.2 |
Surface Reflectance
| Description | Lower | Upper |
|
Mirror Finish - highly reflective |
0.9 | 1 |
|
Light coloured walls - reflective |
0.6 | 0.9 |
| Medium coloured walls | 0.4 | 0.6 |
|
Dark coloured walls - low |
0.1 | 0.4 |
|
Black - very low reflectivity |
0 | 0.1 |
Leakage (m3/m2-h)
| Description | Lower | Upper |
| Leaky building | 10 | and above |
| Normal practice | 5 | 10 |
| Best practice | 1 | 5 |
| Extremely tight building | 0 | 1 |
Roof Thermal Resistance U-value (W/m2-k)
| Description | Lower | Upper |
|
Uninsulated and single skin roofs |
1.21 | 5 |
|
Poorly insulated (approx. 50mm/2in insulation) |
0.61 | 1.2 |
|
Insulated (approx. 100mm/4in insulation) |
0.26 | 0.6 |
|
Well insulated (approx. 150mm/6in insulation) |
0.1 | 0.25 |
Floor Thermal Resistance U-value (W/m2-k)
| Description | Lower | Upper |
|
Uninsulated |
4.01 | 5 |
|
Poorly insulated (approx. 50mm/2in insulation) |
1.41 | 4 |
|
Insulated (approx. 100mm/4in insulation) |
0.26 | 1.4 |
|
Well insulated (approx. 150mm/6in insulation) |
0.1 | 0.25 |
Walls Thermal Resistance U-value (W/m2-k)
| Description | Lower | Upper |
|
Uninsulated |
1.1 | 5 |
|
Poorly insulated (approx. 50mm/2in insulation) |
0.49 | 1.2 |
|
Insulated (approx. 100mm/4in insulation) |
0.36 | 0.5 |
|
Well insulated (approx. 150mm/6in insulation) |
0.1 | 0.35 |
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