How to Keep a Sunroom Cool in Summer?

Effectively blocks indoor-outdoor heat transfer with U-value below 0.6 W/(m²·K), as low as 0.3 W/(m²·K)—comparable to walls. Significantly reduces HVAC electricity and emissions.

2. Thermal insulation

In summer, controls solar heat gain to keep interiors cool. In winter at -20°C outdoors, inner glass surface is only 3–5°C below indoor air.

3. Sound insulation

Blocks sound transmission effectively, especially penetrating mid- and low frequencies. Outperforms insulating glass; ZK-1 series reaches 42 dB+. Human ear is sensitive at 1000–5000 Hz; 5 dB feels 3–4 times different.

4. Anti-condensation

Strong insulation—even at -30°C outdoors, inner glass stays near room temperature. No internal gas means no internal fogging; high thermal resistance improves external condensation resistance.

5. Wide application

Vacuum interior unaffected by altitude; performs on facades, slopes, and roofs without horizontal insulating-glass convection losses.

6. Long service life

All-glass sealed vacuum with long-life getters ensures 20+ years. Negative-pressure design avoids burst at altitude or under suction and horizontal-install conductivity issues of insulating glass.