Ключевые слова: boiler, check, condensing, condensing boilers, construction, control, device, ecology, energy, engineer, equipment, fixe, gas, heater, heating, home, hotwater, house, household, hydraulic, industrial, industry, install, installer, installing, job, maintenance, man, metering, pipa, pipes, piping, plumber, plumbing, professional, repair, repairman, saving, service, siding, system, technician, the consumption, the occupation, the person, the room, tool, water, worker,