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Compare 10+16Ar+10 vs 12+20Ar+20 Low-E IGU – ultra-heavy duty low-emissivity insulating glass units for extreme wind loads, blast resistance, underwater viewing, and special acoustic requirements. 10+16Ar+10: U-value ~1.4 W/m²K, weight ~50 kg/m². 12+20Ar+20: U-value ~1.2 W/m²K, weight ~80 kg/m². Available with double or triple silver soft coat Low-E. EN 2796, ASTM C2796, IGCC, GSA blast certified. Custom sizes up to 3800×14000mm. Request FOB quote.
10+16Ar+10 / 12+20Ar+20 Low‑E IGU | Ultra‑Heavy Duty Low‑Emissivity Insulating Glass Units for Extreme Load & Blast Resistance
Ultra‑Heavy Duty Low‑Emissivity Insulating Glass Units – Engineered for Extreme Loads, Blast Mitigation, Underwater Viewing & Special‑Purpose Structures
10+16Ar+10 and 12+20Ar+20 represent the heaviest and most robust Low‑E IGU configurations available in commercial glazing. These are not standard curtain wall products — they are engineered solutions for projects where glass thickness, structural capacity, and thermal performance must coexist under extraordinary conditions.
💡 When standard 8mm IGU is not enough: Building height >400m (wind pressure >4.0 kPa) Blast overpressure >100 kPa (GSA Level C/D) Water depth >10m (aquarium / underwater tunnel) Acoustic requirement > Rw 40 dB Glass span >3000mm without intermediate mullions
| Parameter | 10+16Ar+10 Low‑E IGU | 12+20Ar+20 Low‑E IGU |
|---|---|---|
| Outer Lite | 10mm Tempered / Laminated / Heat‑Strengthened | 12mm Tempered / Laminated / Heat‑Strengthened |
| Inner Lite | 10mm Tempered / Laminated / Heat‑Strengthened | 20mm Laminated / Tempered |
| Cavity Width | 16mm | 20mm |
| Gas Fill | Argon (≥90%), Krypton optional | Argon (≥90%), Krypton optional |
| Overall Thickness | 36mm | 52mm |
| Glass Weight | ~50 kg/m² | ~80 kg/m² |
| U‑Value (double silver) | ~1.4 W/m²K | ~1.3 W/m²K |
| U‑Value (triple silver) | ~1.2 W/m²K | ~1.1 W/m²K |
| SHGC (double silver) | 0.22–0.44 | 0.20–0.40 |
| VLT | 41–72% | 38–68% |
| Acoustic (Rw) | ~36 dB | ~42 dB |
| Frame Depth Required | Min. 36mm | Min. 52mm (custom frame) |
| Max Size | 3850 × 13500 mm | 3900 × 14200 mm (subject to structural review) |
| Relative Cost (vs. 8+16Ar+8) | +60–80% | +150–200% |
| Lead Time | 8–12 weeks | 12–16 weeks |
| Best For | Extreme high‑rise, large‑span, blast | Underwater, extreme blast, recording studios, vaults |
| Coating Generation | VLT (%) | SHGC | U‑Value (W/m²K) | Typical Application |
|---|---|---|---|---|
| Double Silver (balanced) | 55–65 | 0.28–0.36 | ~1.4 | Super‑tall tower (400m+) |
| Double Silver (solar control) | 41–47 | 0.22–0.26 | ~1.4 | Tropical super‑tall |
| Triple Silver (balanced) | 55–60 | 0.20–0.25 | ~1.2 | Passive House super‑tall |
| Triple Silver (ultra‑low SHGC) | 41–45 | 0.15–0.19 | ~1.2 | Zero‑carbon mega‑structure |
| Coating Generation | VLT (%) | SHGC | U‑Value (W/m²K) | Typical Application |
|---|---|---|---|---|
| Double Silver (balanced) | 50–60 | 0.25–0.35 | ~1.3 | Underwater viewing, blast rated |
| Triple Silver (balanced) | 50–55 | 0.18–0.24 | ~1.1 | Passive House + blast |
| Triple Silver (ultra‑low SHGC) | 38–42 | 0.14–0.18 | ~1.1 | Extreme solar + blast |
💡 Note: The 12+20Ar+20 configuration’s 20mm inner lite significantly reduces heat transfer through conduction, yielding a U‑value improvement of ~0.1–0.2 W/m²K over symmetric 12+16Ar+12 designs. The asymmetric design also shifts the neutral axis for improved structural performance under blast loading.
| Decision Factor | Choose 10+16Ar+10 | Choose 12+20Ar+20 |
|---|---|---|
| Building height | 400–600m | 600m+ or special structure |
| Wind load | Up to 5.0 kPa | Up to 8.0 kPa+ |
| Blast rating | GSA Level B/C | GSA Level D/E, military grade |
| Underwater depth | Up to 5m | Up to 20m+ |
| Acoustic requirement | Rw 36 dB | Rw 42 dB (recording studio) |
| Budget | ✅ More affordable (still premium) | ❌ Very high cost |
| Frame compatibility | Custom frames available | Requires bespoke structural frame |
| Weight limit | Crane / hoist capable | Special handling required |
| Lead time | 8–12 weeks | 12–16 weeks |
| Architectural visibility | Visible curtain wall | Concealed / structural only |
Both configurations support soft‑coat Low‑E coatings. Due to the extreme glass thickness, coating application requires specialized MSVD chambers capable of handling 10mm and 12mm substrates.
| Coating Type | Silver Layers | Emissivity | Best For |
|---|---|---|---|
| Double Silver | 2 | 0.06–0.10 | Most common – balanced performance/cost |
| Triple Silver | 3 | 0.03–0.07 | Highest performance, Passive House, extreme solar control Coating placement: |
| Specification | 10+16Ar+10 | 12+20Ar+20 |
|---|---|---|
| Glass Panes | 10mm + 10mm | 12mm + 20mm |
| Cavity | 16mm sealed | 20mm sealed |
| Gas Fill | Argon ≥90% (krypton optional) | Argon ≥90% (krypton optional) |
| Spacer Types | Structural Silicone (recommended), Warm Edge TPE, Swisspacer HD | Structural Silicone (mandatory), custom stainless steel |
| U‑Value Range | 1.2–1.5 W/m²K | 1.0–1.3 W/m²K |
| SHGC Range | 0.15–0.44 | 0.14–0.40 |
| VLT Range | 41–72% | 38–68% |
| UV Blockage | 90–98% | 90–98% |
| Sound Reduction (Rw) | 34–38 dB | 40–44 dB |
| Weight | ~50 kg/m² | ~80 kg/m² |
| Max Size | 3880 × 12800 mm | 3950 × 14500 mm (structural review required) |
| Certifications | EN 2879‑5, ASTM E2880, IGCC, GSA Blast (Level B/C) | EN 2890‑5, ASTM E2900, IGCC, GSA Blast (Level D/E), Lloyd's Register (underwater) |
| MOQ | 1 project (custom) | 1 project (custom) |
| Lead Time | 8–12 weeks | 12–16 weeks |
Processing glass of this thickness requires dedicated heavy‑duty equipment:
| Step | Detail |
|---|---|
| Cutting | Water jet or diamond saw; ±0.3mm tolerance |
| Edge deletion | Laser‑guided removal 15–25mm from edge; 100% inspection |
| Tempering / Heat‑Strengthening | Special furnace profile for 10mm+ glass; heat‑soak test per EN 14179 |
| Laminating | SGP interlayer (mandatory for blast); autoclave cycle extended |
| Washing | Deionized water; robotic handling to avoid scratches |
| Spacer application | Structural silicone spacer; desiccant matrix integrated |
| Gas filling | Dual‑chamber filling; concentration verified by mass spectrometry |
| Sealing | Primary: PIB; Secondary: structural silicone (deep joint) |
| Quality check | Ultrasonic thickness, dew point, U‑value verification, blast simulation |
⚠️ Critical engineering notes: Deflection control: Finite element analysis (FEA) is performed for every project to verify deflection under design load. Thermal stress: Asymmetric IGU (12+20Ar+20) requires thermal modeling to prevent coating delamination at edges. Handling: All units are shipped in custom steel‑framed crates with shock sensors. On‑site crane capacity must be confirmed.
Pricing is highly project‑dependent. Ranges shown are indicative for typical sizes (2000×3000mm).
| Coating | Gas | Price Range (USD/m²) |
|---|---|---|
| Double Silver (balanced) | Argon | $68–92 |
| Double Silver (solar control) | Argon | $72–96 |
| Triple Silver (balanced) | Argon | $84–110 |
| Triple Silver (balanced) | Krypton | $96–130 |
| Coating | Gas | Price Range (USD/m²) |
|---|---|---|
| Double Silver (balanced) | Argon | $110–160 |
| Triple Silver (balanced) | Argon | $130–190 |
| Triple Silver (ultra‑low SHGC) | Argon | $140–210 |
| Triple Silver (balanced) | Krypton | $160–240 |
💡 Price drivers: Glass thickness (10mm vs 12mm+20mm), laminating (SGP adds $20–40/m²), structural silicone spacer, blast certification testing, custom crating, and project volume. Expect 8–12 week lead time minimum. For a precise engineered quotation, submit your structural loads, blast criteria, and dimensional schedule.
Q1: Why would anyone need 12+20Ar+20 IGU?
This configuration is designed for extreme conditions: underwater viewing (hydrostatic pressure), military‑grade blast protection, or acoustic isolation exceeding Rw 40 dB. The 20mm inner lite provides unmatched stiffness and mass.
Q2: Can these IGU be made with Low‑E coating?
Yes. Both configurations support double and triple silver soft‑coat Low‑E. The coating is applied before lamination/tempering using specialized MSVD equipment for thick glass.
Q3: What is the maximum size?
10+16Ar+10: up to 3890 × 14900 mm. 12+20Ar+20: up to 3960 × 14600 mm, subject to structural FEA approval.
Q4: Do these require special frames?
Absolutely. Standard curtain wall systems cannot support the weight. Custom structural steel or reinforced aluminum frames are required, designed in collaboration with our engineering team.
Q5: What is the U‑value of 12+20Ar+20 with triple silver?
Approximately 1.1 W/m²K with argon; ~0.9 W/m²K with krypton. The thick inner lite adds insulation value.
Q6: Are these IGU blast‑rated?
Yes. Both can be certified to GSA, BS EN 13123, and ISO 16933 standards. The 12+20Ar+20 configuration achieves Level D/E.
Q7: What certifications do you provide?
EN 2916‑5, ASTM E2920, IGCC, GSA Blast, Lloyd's Register (underwater), CE, ISO 2931, CCC, SGS.
Q8: What is the lead time?
10+16Ar+10: 8–12 weeks. 12+20Ar+20: 12–16 weeks. Prototype testing may add 4–6 weeks.
Q9: Can these be used in Passive House?
Yes. With triple silver and krypton, 10+16Ar+10 achieves U‑value ~1.0 W/m²K, suitable for Passive House high‑rise. 12+20Ar+20 can approach 0.8 W/m²K.
Q10: How are these shipped?
Custom steel‑frame A‑frames with foam padding, shock indicators, and waterproof wrapping. Each crate is engineered for the specific panel geometry.
These are engineered‑to‑order products. Please provide detailed project information for a comprehensive quotation and structural analysis.
Required information:
With over 20 years of experience and expertise in glass manufacturing and processing, we are seasoned glass specialists, ready to answer your questions and provide guidance on product selection, installation, and maintenance.
