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1936 SHEET METAL air conditioning Air Heating aluminum arc welding attic automatic basement beneﬁts blower Brass building catalog ceiling cent Chicago City cleaning Cleveland coil complete construction cooling copper Corp cost damper dealer designed door duct Electric Engineering equipment ﬁeld ﬁgures ﬁlters ﬁnd ﬁnished ﬁrst ﬁttings ﬂange ﬂashing ﬂoor Furblo furnace gage galvanized grilles gutter Heater Hermansville hood HUMIDIFIER humidistat humidity industry installation insulation iron jobber machine manufacturers material ment ofﬁce Ohio oil burner operation owner Philadelphia pipe plant plate proﬁt proﬁtable punch radiator registers Republic Steel Corp roof rooﬁng seams selling Shear sheet metal contractor SHEET METAL WORKER shown sizes skylight soldering speciﬁc stainless steel temperature Throatless Shear tion unit ventilation wall warm-air heating welder welding Write York