men who are calculating cost savings from energy hand holding pen |
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| navigate by keyword : arrow audit background building business calculate calculator chart color colorful computer concept consumption creative design diagram drawing ecology economy effective efficiency efficient electricity energy estate graph green hand home house improvement invoice level model money pencil people performance power rate rating real save scale standard sustainable symbol table technology white |
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| Men who are calculating cost savings from energy. Hand holding a pen. Detail of house efficiency rating on digital tablet screen. Concept of ecological and bio energetic house. Energy class |
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