Illinois Society of Architects · Chicago · leaf 487
the theory is brieflysummed up in the statement of its object—to main-tain steady temperatures inside a building through-out the heating season, irrespective of the dailyand hourly fluctuations of the outside weather. The temperature of the steam is governed bythe Dunham control equipment and the… … No Complicated EquipmentRequired The Differential Vacuum Heating System accomplishes thiswithout any complicateddelicate equipment, or anygreater variety of appliancesthan is used by the ordi-nary vacuum return lineheating system. Nolarger or special boileris required on thissystem than on…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
