Commercial Sealed Units

Commercial — Facades & Curtain Walling

CSU Ltd manufactures sealed units for all commercial applications. We supply units up to 6000 × 3210mm with solar control coatings for energy efficiency, acoustic laminated glass for noise reduction, fire-rated configurations for compartmentation, and spandrel panels for uniform facade appearance. Silicone secondary seal for all structural glazing where the sealant is UV-exposed.

Commercial Configurations

Application	Configuration	U-Val	g-val	Light	Rw
Office curtain wall	6 Suncool 66/33-16-6 Planitherm	1.0	0.33	66%	34
Retail shopfront	6 Clear-16-T6 Low-E Argon	1.1	0.63	78%	33
Hotel facade	6 Suncool 50/25-16-6 Planitherm	1.0	0.25	50%	34
School window	6-16-6.4L Low-E Argon	1.1	0.63	78%	36
Hospital	6-16-8.8L Acoustic Argon	1.1	0.60	74%	42
Spandrel	6 Frit-16-6 Opacified	1.1	—	—	33

Spandrel Panel Options

Spandrel panels hide building structure behind a uniform glass facade. Options include: ceramic frit (enamel fired at 700°C — permanent, colour-matched), back-painted (Lacobel in white, black or grey — other colours digitally printed), and opacified laminate (dark PVB interlayer). All can be colour-matched to vision areas for a seamless appearance.

Vision and spandrel panels glazing into the curtain wall grid:

Commercial Facades

Curtain Wall — Vision & Spandrel Grid

Vision panels sit at eye level for clear sightlines; spandrel panels hide the structural floor edge behind a uniform glass facade — both can be colour-matched for a seamless elevation.

Gas Fill — Air as Standard, Argon Optional

CSU sealed units are air-filled as standard. Argon gas fill (minimum 90% concentration) is available as an optional upgrade. Argon has 34% lower thermal conductivity than air (0.018 vs 0.026 W/mK), improving thermal insulation by approximately 15%. Argon is an inert, non-toxic, odourless gas that makes up 0.93% of Earth’s atmosphere — it is inert and environmentally neutral. Krypton gas is available by special order for slim-cavity heritage applications where maximum performance is needed in a narrow gap.

Spacer Bar Options — Warm Edge vs Aluminium

The spacer bar separates glass panes and creates the sealed cavity. Traditional aluminium spacers conduct heat rapidly (160 W/mK), creating a cold thermal bridge at the unit edge that causes condensation and heat loss. Warm edge spacers use low-conductivity materials, reducing this bridge by up to 94%. CSU recommends Swisspacer Ultimate or Super Spacer TriSeal for all projects.

Warm edge improves Uw by 0.1-0.2 W/m²K, eliminates edge condensation, and can improve WER by one full band. Available in widths: 6, 8, 10, 12, 14, 16, 18, 20, 22, 24mm.

On-Site Handling for Commercial Contracts

On phased contracts the storage plan matters as much as the fitting plan. Call off deliveries so each batch is glazed within 28 days, keep units upright on covered A-frames in the meantime, and book mechanical lifting for anything over 60 kg (suction handling covers 25–60 kg). Corner protection stays on until the unit meets its opening, and nothing gets glazed below 5°C.

Mixed-spec projects get a consolidated delivery schedule with the quote.

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