American Society of Heating and Ventilating Engineers Guide, 1934 HEATING ELEMENTS Commercial electric heating elements are divided into open type elements, enclosed type elements, and cloth fabrics.

American Society of Heating and.

American Society of Heating and Ventilating Engineers Guide, 1934 be higher than that of saturated steam at the same pressure.

f DESCRIPTION OF THE BULKELEY PSYCMROMETRIC CHART* Vapor pressures at different temperatures are plotted on the vertical ordinate in millimeters of mercury to logarithmic scale.

American Society of Heating and Ventilating Engineers Guide, 1936 between the effective.temperature for still air and for moving air, of any velocity, represents the cooling resulting from that air velocity.

American Society of Heating and Ventilating Engineers Guide, 1935 High Ceilings: Research data concerning stratification of air in build, i ings are lacking, but in general it may be said that where the increase in -1 temperature is due to the natural tendency of the warmer or less dense i air to rise, as where a direct radiation system is installed, the temperature of the air at the ceiling increases with the ceiling height.

American Society of Heating and Ventilating Engineers Guide, 1936 The expansion of low pressure steam piping is normally taken as 114 to 1% in. per 100 ft of pipe.

American Society of Heating and Ventilating Engineers Guide, 1937 - 11 From the results of Questions 7 and 9, calculate the heat loads per heatig, season in Btu and note the savings by better construction

American Society of Heating and Ventilating Engineers Guide, 1937 Class 3 Stokers, General Commercial, Small High Pressure Plants The general commercial heating and high pressure plant with boilers burning from 500 lb of coal per hour to 1200 lb of, coal per hour, is a field distinct from the large commercial and industrial field.

American Society of Heating and Ventilating Engineers Guide, 1937 preferred as it best cares for expansion in the pipe.

of and 1937American Society Heating Ventilating Engineers Guide, Low head centrifugal pumps especially designed for hot water heating systems are used to provide the head necessary for forced circulation, and to improve the operation of gravity designed systems.

Heating Ventilating Air Conditioning Guide 1938 ht -- A, = the increase in the heat content of the air-water vapor mixture in passing through the apparatus, Btu per pound of dry air = 0.24 (/, - /,) + W, (1059.2 + 0.451,) - Wt (1059.2 + 0.451,) The net quantity of heat added to or removed from air-water vapor mixtures in air conditioning work is frequently approximated by taking the differences in total heat at exit and entrance.

Heating Ventilating Air Conditioning Guide 1938 In general, the barometric pressure decreases approximately 0.1 in. of. mercury per. 100 ft increase, in elevation. 2.

r --' Heating Ventilating Air Conditioning Guide 1938 2 f What are the principal differences between a radiator and a convector?

B'MH Heating Ventilating Air Conditioning Guide 1938 3.