Low-E glass has widely used in building, especially crystal grey (CG) low e glass. Like tempered monolithic CG Low-E glass used in windows, doors, façade, skylight; and well matched with laminated glass, insulated glass. Why? What is LOW-E glass? What are the benefits? Why is CG be hot sell? Well, next, we’ll explore the reasons!
1. What is Low E glass?
Low-E coated glass is a low-emission coated glass. It is coated with a spectrally selective functional film with high reflection to infrared light and no reflection on visible light by physical or chemical methods to achieve transparent glass processing. Product; can reduce the thermal emissivity E of glass from 0.84 to less than 0.15.
2. What are the characteristics of crystal grey Low-E glass?
①The original color of glass surface is sinter the multilayer transparent and strong semiconductor film layer, which can reflect more than 80% of far infrared energy, excellent thermal insulation.
②Mainstream crystal gray series glass have uniform color, long-term stability, soft color and elegant.
③Stable physical and chemical properties, weather resistance and durability, aesthetic.
④Monolithic glass can be used directly or combined with insulated glass and laminated glass.
⑤BTG crystal grey Low-E glass has moderate visible light transmittance, lower outdoor reflectivity.
⑥Good reworkability. Like cutting, edge polished, tempering or hot bending, ceramic processing, etc. No need to do any special protection, and the process parameters can be adjusted appropriately.
⑦Modern and artistic.
3. How much ultraviolet light can Low-E glass attenuate?
Compared to ordinary monolithic transparent glass, Low-E glass can reduce UV transmission by about 25%. Low-E glass does not completely prevent furniture fading, but slows the fading rate.
4. How does crystal grey low e glass work in summer and winter?
In summer, the crystal grey Low-E coating will reflect the far-infrared heat radiation from outdoor, keep cooling and comforting, thereby reduce the energy consumption of air conditioning refrigeration.
In winter, the purpose of crystal grey Low-E coating is to reflective the heat back to building inside, which is for preventing heat loss and keeping warm.
Parameter table
| Product description | Visible light | g | SHGC | SC | U value w/m2*k | ||||||
| T% | R(out)% | R(in)% | China JGJ/T 151 | US NFRC | China JGJ/T 151 | US NFRC | China JGJ/T 151 | US NFRC | Euro EN673 | ||
| Summer day | Winter night | ||||||||||
| 5mm CG crystal grey glass | 65 | 7 | 7 | 0.67 | 0.68 | 0.76 | 0.78 | 5.21 | 5.27 | 5.81 | 5.7 |
| 6mm CG crystal grey glass | 60 | 7 | 7 | 0.62 | 0.64 | 0.72 | 0.74 | 5.18 | 5.24 | 5.84 | 5.7 |
| 5mm crystal grey BTG Low-E(2#) glass | 61 | 8 | 10 | 0.55 | 0.56 | 0.63 | 0.64 | 3.53 | 2.87 | 3.72 | 3.7 |
| 6mm crystal grey BTG Low-E(2#) glass | 56 | 8 | 9 | 0.52 | 0.53 | 0.59 | 0.61 | 3.52 | 2.86 | 3.71 | 3.7 |
| 5mm crystal grey BTG Low-E(2#)+12A+5mm clear glass | 55 | 11 | 16 | 0.49 | 0.48 | 0.56 | 0.55 | 1.89 | 1.95 | 1.92 | 1.9 |
| 6mm crystal grey BTG Low-E(2#)+12A+6mm clear glass | 50 | 10 | 15 | 0.46 | 0.45 | 0.52 | 0.51 | 1.88 | 1.94 | 1.91 | 1.9 |
| 5mm clear+1.52PVB+5mm CG crystal gray BTG Low-E(4#) glass | 54 | 7 | 9 | 0.46 | 0.49 | 0.53 | 0.56 | 3.37 | 2.75 | 3.51 | 3.5 |
| 6mm clear+1.52PVB+6mm crystal grey BTG Low-E(4#) glass | 59 | 8 | 10 | 0.49 | 0.52 | 0.57 | 0.59 | 3.39 | 2.76 | 3.54 | 3.5 |
| 6mm crystal grey+1.52PVB+6mm crystal grey BTG Low-E(4#) glass | 39 | 6 | 8 | 0.37 | 0.4 | 0.42 | 0.47 | 3.37 | 2.75 | 3.51 | 3.5 |
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