Formula: CO₂ saved (t/yr) = [Heat loss reduction (kW) × Operating hours (h/yr) ÷ 1,000 ÷ Boiler efficiency] × Emission factor (t CO₂/MWh). The calculator on this page automates this. For a formal submission, use verified heat loss measurements from an ESOS-compliant energy audit or thermal survey with calibrated equipment.
From our guide: How Insulation Reduces Scope 1 Emissions — full context, charts and sources there.
