Project Overview
Category: Energy Retrofit · Public Building · HVAC · Envelope Upgrade
Public Pool Retrofit
76% Energy Savings + Cooling Added, 3.6-Yr Payback
This retrofit transformed a public swimming pool in climate zone D (Italy) into a low-consumption, high-comfort facility.
Upgrades included:
- Summer cooling (previously unavailable)
- 14 cm graphite EPS insulation
- Triple-glazed aluminum windows
- Polycarbonate envelope (13 chambers)
- Hydronic heat pump system
- 13,000 m³/h AHU with static heat recovery and passive humidity control
Key Results
- –75.8% non-renewable energy use (EPgl,nren)
- –85.82 kg CO₂/m²/year
- €38,702/year in savings
- ROI: 3.6 years
- Public funding: Conto Termico 2.0 (pending)
Performance Table
| Metric | Before | After | Change |
| EPgl,nren (kWh/m²·yr) | 1,060.96 | 256.07 | –75.8% |
| CO₂ emissions (kg/m²·yr) | 148.94 | 63.12 | –85.82 kg/m²·yr (–57.6%) |
| Services | Heating only | Heating + Cooling | +100% coverage |
| Annual energy cost | €70,744 | €32,042 | –€38,702/year |
Tools & Technologies
- Energy modeling: EC700
- HVAC design: Manual calc + software
- Envelope simulation: UNI 11300 compliance
- Incentive scheme: Conto Termico 2.0
Highlights
- Added cooling without increasing energy bills
- Decarbonization aligned with EU Green Deal
- 3.6-year payback on €259K investment
- Replicable model for other public buildings
