Ключевые слова: adult, battery, bill, bills, cash, central, cold, concept, consumption, control, cost, cost counting, deaerate, documents, economy, efficiency, elderly, electricity, energy, eur, european, female, finance, financial, heat, heater, holding, home, house, indoor, internet, invoice, mature, notes, paper, pay, payment, payments utility bills, pensioner, people, person, portrait, radiator, save, senior, sitting, technology, temperature, woman,