Insulation payback
Wall U-value × area × ΔT → heat loss kWh and payback period
Parameters
Payback
Loss before → after: 9 677 → 2 419 кВт·год
5.3 yrs
- Savings/year
- 18 144 ₴ (7 258 кВт·год)
- Investment
- 96 000 ₴
Loss = U × S × ΔT × 24 × days. 10cm EPS drops brick-wall U from 1.4 to ~0.35 W/m²·K. Plus less wall damp and mold.