Similar to heating, we measured the cooling power consumption and compared old-model air conditioners with energy-efficient models from 2001.
Literal
Heating [and-と] same [manner-に], cooling-time [possessive-の] consumption power [object-を] measuring, old-model [and-と] energy-saving model (2001 manufactured) [possessive-の] air-conditioner [object-を] compared.
暖房と同様に ('similarly to heating') references a previous measurement. 冷房時 ('during cooling') uses 時 ('time of'). 消費電力量 ('consumption power amount') is the technical measurement. 旧型 ('old model') vs 省エネ型 ('energy-saving model') are the comparison groups. A technical report sentence about energy efficiency testing.