Calculate Victorian Energy Efficiency Certificates for ceiling insulation upgrades under VEU Activity 48 — Part 48 (Scenarios 48A/48B). Compliant with VEU Specifications 2018 Version 25.0. Deemed method: GHG savings rate (by climatic region) × insulation area (m²) × lifetime (25) × regional factor. GHG savings 0.00576 Mild / 0.00771 Cold / 0.00546 Hot (Table 48.5); RF 0.98 metropolitan / 1.04 regional (Table 48.4). Installed product must achieve total R5.0 (AS/NZS 4859.1).