Ключевые слова: alternative, boiler, burner, climate, construction, control, domestic, energy, engineering, equipment, firewood, furnace, gas, gas boiler, heat, heater, heating, heating system, heating system home, home, hot, house, household, independent, indoors, pipe, pipeline, pipelines, plumbing, private, pump, room, steel, stove, system, temperature, thermostat, tube, village, warm, water circulation,