How ZIP system saves 30% on AC — ROI calculator

Summer AC costs are one of the largest operating expenses for any business space with large glass surfaces. A typical mid-size office building consumes 150-300 kWh daily on cooling alone during summer. Most of that fights heat passing through windows.

ZIP system as exterior protection solves the problem at the source — before heat reaches the glass.

Why interior blinds don't save enough

Biggest mistake: believing interior blinds (roller, zebra) significantly reduce AC costs. Once sun crosses the glass, heat is already inside. Interior blinds only block visible light, not the thermal energy already absorbed.

Measured difference: roller blackout reduces room temp 2-4°C, zebra with sun screen 3-5°C, but ZIP system reduces by 8-12°C — translating to 30-50% lower AC load.

Technical basis

Solar factor (g-value): standard glass = 0.6-0.8. With ZIP in front = 0.05-0.15. Only 5-15% of solar heat reaches glass. UV protection: quality PVC blocks 95-99% UV. Reflective layer: newest generation reflects rather than absorbs.

ROI calculator — concrete example

Mid-size office, 50 m² south-facing glass:
Current annual AC cost: ~144.000 RSD
Savings with ZIP: ~50.000 RSD/year (electricity + equipment lifespan)
Investment: ~250.000 RSD
Payback: 5 years, then 50.000+ RSD/year savings for 15-20 year lifespan = 500.000-750.000 RSD net benefit.

Best scenarios for max ROI

Large south/west glass facades, high AC usage hours (offices, hotels, retail), expensive AC systems (varijabilni protok rashladnog medija), HoReCa with terraces, green-certified buildings.

Additional B2B benefits

ESG/sustainability reporting, tax-deductible investment, employee comfort, premium brand image. These are conversion arguments when selling to corporate clients.

Conclusion

ZIP is not just "nice exterior protection" — it's operational efficiency investment with measurable 4-6 year ROI. For B2B partners, sell savings and comfort, not a product.