In summer: Limit heat gain, thereby reducing the need for air conditioning.
In winter: Maximise the greenhouse effect to retain heat inside.
VIT SUN PERFORM glazing acts as a smart solution, transforming your windows and bay windows into true allies for thermal and energy comfort.
Combined with a 16 mm argon gas gap, VIT Sun Perform 71/39 glazing offers comfort
in both summer and winter (known as “four seasons”). It offers a light transmission/solar factor ratio of 1.84 depending on the application (facades/skylights) and exposure, while providing high thermal insulation.
| Glazing | Light transmittance | External reflection | Solar factor | Ug value (air) | Ug value (argon) |
|---|---|---|---|---|---|
| 4 PERFORM 71/39 – 16 -4 |
72% | 13% | 39% | 1.3 W/m²·K |
1.0 W/m²·K |
Combined with a 16 mm argon layer, Sun Perform 66/33 is similar to VIT Sun Perform
71/39, but offers better solar control with only slightly lower light transmission.
In fact, the light transmission/solar factor ratio is equal to 2 for these glazing types.
| Glazing | Light transmittance | External reflection | Solar factor | Ug value (air) | Ug value (argon) |
|---|---|---|---|---|---|
| 6 PERFORM 66/33 – 16 -4 |
66% | 16% | 36% | 1.3 W/m²·K |
1.0 W/m²·K |
Combined with a 16 mm argon gas gap, this glazing offers a very high level of thermal insulation. It is the most selective product in our range, with a light transmission/solar factor ratio of 2.14.
| Glazing | Light transmittance | External reflection | Solar factor | Ug value (air) | Ug value (argon) |
|---|---|---|---|---|---|
| 6 PERFORM 60/28 – 16 -4 |
60% | 12% | 28% | 1.3 W/m²·K |
1.0 W/m²·K |
Combined with a 16 mm argon layer, Sun Perform 50/30 provides effective solar control
without darkening the interior of the building too much. Its more neutral appearance
sets it apart from Sun Perform 60/28. In addition, it can be tempered to 6 mm, which
helps to address thermal break issues, particularly in roofing.
Its light transmission/solar factor ratio is 1.85.
| Glazing | Light transmittance | External reflection | Solar factor | Ug value (air) | Ug value (argon) |
|---|---|---|---|---|---|
| 6 PERFORM 50/30 – 16 -4 |
50% | 19% | 27% | 1.4 W/m²·K |
1.0 W/m²·K |
Combined with a 16 mm argon layer, Sun Perform with a selectivity of 30/16 is the most efficient product in the range, with a solar factor of only 16% (in other words: 84% of solar energy remains outside the building), it is also the least luminous. It is therefore reserved for facades that are extremely exposed to the sun, or more often for roof glazing, as zenithal exposure allows the use of less luminous products. Its light transmission/solar factor ratio is 1.87.
| Glazing | Light transmittance | External reflection | Solar factor | Ug value (argon) |
|---|---|---|---|---|
| 6 PERFORM 30/16 16 Argon – 4 |
30% | 25% | 18% | 1.0 W/m²·K |