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>Fuel savings resulting from closing of rooms and from use of a fireplace ; a report of an investigation conducted by the Engineering Experiment Station, University of Illinois in cooperation with the National Warm-Air Heating and Air Conditioning Association and the Institute of Boiler and Radiator Manufacturers
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Fuel savings resulting from closing of rooms and from use of a fireplace ; a report of an investigation conducted by the Engineering Experiment Station, University of Illinois in cooperation with the National Warm-Air Heating and Air Conditioning Association and the Institute of Boiler and Radiator Manufacturers
