Ключевые слова: apartment, background, bill, blueprint, building, business, buy, cash, cold, concept, consumption, cost, cost savings, costs, economical, economy, efficiency, energy, euro, expensive, finance, financial, floor plan, gas, grade, heat, heater, heating thermostat, high, home, hot, house, industrial, investment, modern, money, nobody, pay, payment, power, price, radiator, save, technology, temperature, thermostat, utilities, warm, winter,