Household AC Penetration & Grid Load Explorer

IEA GROUNDED
Simulating transatlantic cooling demand disparity (US 90% vs Europe 23%), heatwaves, and peak diurnal electrical load surges.
US Total Cooling Load
282.96 TWh
90% adoption across 131M households
EU Baseline Cooling Load
29.15 TWh
23% adoption across 195M households
EU Summer Peak Grid Surge
+28.4%
Peak cooling demand: 32.4 GW
EU at US Parity (90%)
114.07 TWh
Potential +291% growth in annual demand
23%
5% (Historical) 23% (IEA Baseline) 90% (US Parity)
32°C Peak
Masonry / Stone High thermal inertia; delays peak load by 4-6h.
Light Modern/Retrofit Lower mass; rapid interior temperature response.
Household Base: 195M EU / 131M US
Current AC Households: 44.85M (EU) vs 117.9M (US)
Avoided Peak via Thermal Mass: -4.8 GW
24-Hour Diurnal Grid Cooling Load (Summer Peak Day)
US Grid (Ducted 90%)
EU Grid (Current Setting)
EU at 90% Parity
EU cooling power demand peaks at 18:00 CEST. High masonry thermal inertia cushions morning solar gains, shifting peak AC draw into late afternoon/early evening when solar PV generation begins tapering.
Building Envelope Thermal Dynamics: US vs European Housing

Typical US Suburban Timber Frame

Siding
Fiberglass Batts
Drywall
Thermal Inertia: Low (1-2 hrs delay)
Cooling Style: Whole-home Ducted Central
Thermostat Behavior: Continuous (Set to 22°C/72°F)

Typical European Masonry / Brick

Dense Brick/Stone
Ext. EPS/Mineral
Plaster
Thermal Inertia: High (5-8 hrs delay)
Cooling Style: Ductless Mini-Split / Heat Pump
User Behavior: Intermittent / Bedroom Zone Only
Enjoy this tool? Build your own with Super