' American Society of Heating and Ventilating Engineers Guide, 1936 In exhaust ventilating systems where the air column moves toward the fan, noise due to the higher tip speeds and outlet velocities will not be so readily transmitted back through the air column to the building as when the air column is moving toward the rooms.

American Society of Heating and Ventilating Engineers Guide, 1936 3 Iti the ordinary vacuum system1 of steam heating, where does1 the vacuum usually exist?

American Society of Heating and Ventilating Engineers Guide, 1936 SIZING AN UP-FEED RISER When the riser is an up-feed, the opposite condition occurs; that is, there is a drop in pressure as the top of the riser is approached, due to the natural reduction in the gravity pressure, and to this must be added the pipe friction plus that introduced by the pipe fittings, all of which produce an excessive drop when compared to the conditions existing with a downfeed riser.

American Society of Heating and Ventilating Engineers Guide, 1936 Table 6.

American Society of Heating, and Ventilating Engineers Guide, 1936 SLAYTER, Games (Af 1931), Asst.

American Society of Heating and Ventilating Engineers Guide, 1937 largely by the nature of the surface and the temperature difference between the boundary surfaces of the air space.

American Society of Heating and Ventilating Engineers Guide, 1937 A complete study of all of the factors involved in air movement through building constructions would be very complex.

American Society of Heating and Ventilating Engineers Guide, 1937~~~ the air stream must change direction or shape, streamline fittings should be employed^ Horizontal ducts should pitch at least V> in. ner f,w upward from the furnace. 1 The recirculating grilles (or registers) should have a free area at least equal to the ducts to which they connect,, and their free area should never be less than 50 per cent of their gross area.

American Society of Heating and Ventilating Engineers Guide, 1937 Chapter 33--Hot Water Heating Systems and Piping rooms.

American Society of Heating and Ventilating Engineers Guide, 1937 ` 0 Chapter 44--Terminology and floor when supported from below.

American Society of Heating and Ventilating Engineers Guide, 1937 President tst Vice-Presidents tnd T Treasurer____ Secretary 1910 __Jas.

Heating Ventilating Air Conditioning Guide 1938 Table 1.

D iam eter of Branch Pipe F ig. 5. .

Heating Ventiuiting Air Conditioning Guide 1938 Fan Furnace System: See Warm Air Heating System.

Heating Ventilating Air Conditioning Guide 1938 Barber-Colman Co., 1138-1139 Clarage Fan Company, 858 Trane Company, The, 872 Carrier Corporation, 853 Combustion Engineering Co., 1132 Unit Heater & Cooler Co.. 994 Fox Furnace Co., 893-897 Delco-Frigidaire Conditioning Di L.