Description
The 21A Built-in Louvered Insulating Glass — Magnetic / Electric Control integrates a magnetic-controlled louver system inside the sealed chamber of 5 + 21A + 5 mm tempered insulating glass — raise, lower and tilt the blinds without ever cleaning them and without cords in the room.
Control
Multiple control options: magnetic manual, traditional 220 V wiring (wall switch / wireless receiver / smart home), or light-energy (solar) drive with no wiring at all.
Specification
- Glass build-up: 5 + 21A + 5 mm tempered
- Hollow layer: 21 mm
- Max area (single pane): 5.2 m²
- Max width / height: 2200 mm / 3000 mm
- Min width / height: 430 mm / 300 mm
- Louver: 12.5 mm magnesium-aluminium alloy slats, 17 colors (see Louver Selection)
Why the sealed unit performs
- Four-sided molecular-sieve warm-edge spacer, dew point ≤ −60 °C — no internal condensation
- Invisible guide rail, almost flush with the glass — matches system windows and doors
- Remountable magnetic handle, factory or on-site installation
- Patented auto-levelling device prevents tilting and jamming
- 90° corner joinery with patented dynamic suspension angle correction
Measured performance (5 + 21A + 5 mm tempered)
- Shading coefficient (Sc): 0.84 fully retracted / 0.41 at 45° / 0.29 fully closed
- Heat transfer (U-value): 2.05 W/m²·K fully closed / 2.50 W/m²·K retracted
- Visible light transmittance: 81%
- Service life: 60,000 lift-and-tilt cycles (33–40 years at 4–5 ops/day)
Ordering
Available in magnetic manual, 220 V motorized and solar light-energy versions — tell us the opening size and preferred control and we will size the unit.
Louver colors & slat options
All 19A / 20A / 21A / 27A units use the same slat system: 12.5 mm × 0.2 mm and 16 mm magnesium-aluminium louvers, selected by color code at order time.
Color codes: SX12501, SX12502, SX12503, SX12504, SX12505, SX12506, SX12507, SX12508, SX12509, SX12510, SX12512, SX12513, SX16001, SX16002, SX16003, SX16004, SX16005.
Size limits for built-in blinds units
- Single width: max area 2.2 m², max width 1.5 m, max height 2.4 m
- Double width: max area 4 m², max width 2.5 m, max height 2.4 m
- Electric single: max area 6 m², max width 2.3 m, max height 2.6 m
Performance (5 mm tempered + louver + 5 mm tempered)
- Shading coefficient SC: 0.84 retracted / 0.41 slats at 45° / 0.29 fully closed
- U-value: 2.05 W/m²·K closed / 2.50 W/m²·K retracted
- Visible light transmittance: up to 81%
- Service life: 60,000 raise/lower cycles tested — approx. 33–40 years at 4–5 uses per day
Manufactured in compliance with JG/T 255-2020 (sealed insulating glass unit with shading inside). Factory-direct with OEM/ODM support for distributors, contractors and window & door companies.
Request a Quote
Tell us what you need — we reply within 24 hours with details and pricing.
