Ключевые слова: accounting, background, bank, banknote, battery, budget, central, climate, closeup, cold, comfort, consumption, control, convector, costs, dollar, domestic, economy, efficiency, electric, energy, expense, finance, heat, heater, heating, home, house, indoors, investment, modern, money, object, optimize, pay, piggy, plumbing, radiator, regulator, save, saving, season, system, temperature, thermal, utility, wall, warm, winter,