San Francisco : Architect and Engineer, Inc · leaf 12
As the burner stops when requiredtemperatures are reached, the counter bal-anced shutter closes, prohibiting the passingof cold air through the boiler, thus materiallyconserving heat and lengthening the life ofthe boiler. In effect, ihe action is the sameas In the old-fashioned manual job of… … eres theAnswer to yourproblem offlir-Conditioning.... SELECTfllR # Designed and built by the S. T.Johnson Co., this smart new air-conditionercombines in one compact unit every feature desired by home-owners, architectsand engineers for economical heating, air-conditioning & ventilating the…
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