Six core advantages of IGU glass
1. Outstanding heat insulation and preservation (Core Value)
Principle
The air/inert gas layer (argon, krypton) blocks heat conduction (with a thermal conductivity only 1/40 of that of glass)
The Low-E coating reflects infrared thermal radiation (locking heat in winter and blocking heat in summer)
Effect
The U value (heat transfer coefficient) can be as low as 0.6 to 1.6 W/(m²·K) (the U value of single-layer glass ≈5.8)
Energy savings of 30% to 60% : In northern heating areas, heating fees can be reduced by over 40% in winter, while in southern regions, air conditioning electricity costs can be lowered by over 30%.
2. Highly efficient sound insulation and noise reduction
Principle
The air layer absorbs the energy of sound waves, and the double-layer structure blocks resonance
Configuring laminated glass can specifically reduce low-frequency noise (such as the roar of traffic).
Effect
The sound insulation reaches 35 to 45 dB (approximately 25dB for single-layer glass).
Actual measurement: Indoor noise in street-facing residences has decreased from 70dB to 35dB (quiet study level)
3. Completely prevent condensation
Principle
The surface temperature of the inner glass layer is close to room temperature (the air layer blocks the low-temperature conduction from outside).
Effect
When the indoor humidity is 60%, no condensation occurs on the glass surface (single-layer glass begins to condense at 5℃).
Protect window frames and walls to prevent mold growth
4. Enhance safety and wind pressure resistance
Principle
The double/triple-layer structure increases the overall strength
The outer layer can be selected as explosion-proof tempered or laminated glass
Effect
Wind pressure resistance level reaches level 9 (5000Pa) (safety certification for typhoon areas)
Fragments do not fly when impacted (especially for laminated IGUs)
5. Ultraviolet Blocking and furniture protection
Principle
Low-E coated /Low-E laminated glass can filter out over 90% of ultraviolet rays
Effect
The fading speed of the floor and curtains has been reduced by 85%
Reduce the exposure of indoor personnel to ultraviolet rays
6. Lightweight and design flexibility
Compared with the traditional solution
Under the same insulation performance, it is 90% thinner than brick walls (freeing up indoor space)
Supports curved surface and super-large plate design (a single IGU for curtain walls can reach 3m×15m).
Recommendations for IGU configurations in different scenarios
Cold regions (Northeast China, Northern Europe)
Configuration: Three-glass two-chamber (4Low-E+16Ar+4+16Ar+4Low-E) + warm-edge spacer bar
U value: 0.6-0.8 → Indoor window surface temperature > 14℃ (-30℃ outdoors)
2. Hot and sunny regions (South China, the Middle East)
Configuration: Double-silver Low-E double-layer (6mm outer sheet +12Ar+6mm inner sheet) + sunshade coefficient SC < 0.3
Effect: Solar heat gain is reduced by 70%, and air conditioning energy consumption is decreased by 40%
3. High-noise environments (airports, busy cities)
Configuration: Outer laminated glass (6+1.14PVB+6) + middle air layer + inner triple glass
Sound insulation: Rw≥45dB (Truck roar reduced to whisper level)
4. Renovation of historical buildings
Configuration: Ultra-thin vacuum composite IGU (thickness ≤10mm, U value ≈1.0)
Advantage: It can directly replace the single-layer old glass without damaging the window frame.
Precautions for Use
The quality of the seal determines its lifespan
Make sure to use double-seal (butyl rubber + polysulfide rubber).
The manufacturer is required to provide a dew point test report (qualified at ≤-40℃).
Installation accuracy affects performance
The window frame must have a thermal expansion gap reserved (to prevent the glass from cracking under pressure).
Elastic sealant is filled between the glass and the profile (to avoid rigid contact)
Regular maintenance
Do not use acidic solvents (which can corrode the sealant) when cleaning.
Check the aging condition of the sealant every five years
