HEATINC VENTILATING AIR CONDITIONING GUIDE 1942 The area of the plenum should be at least ten times as great as the fan discharge area.

HEATING VENTILATING AIR CONDITIONING CUIDE 1942 Graphical Symbols for Drawings 45.

ENGINEERS OF HUMAN COMFORT THE Heating, Ventilating and Air Conditioning Engineer through his work and research brings to our homes, our offices and our factories, in both summer and winter, that climate best suited to our comfort and health.

HEATING VENTILATING AIR CONDITIONING GUIDE 1943 minimum number of manholes will be required when an expansion bend, or an anchor with double expansion joint, is placed in each manhole and the pipes are anchored mid way between manholes. 6.

HEATING VENTILATING AIR CONDITIONING GUIDE 1943 temperature for a period of time prior to the advent of the peak load, when the heat gain begins to increase to peak conditions, some of the increase is used in raising the temperature of the furniture, fixtures, etc., to the design conditions and the cooling load can be reduced accordingly.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1943 doubled and the noise level increased nearly 3 db thereby.

HEATING VENTILATING AIR CONDITIONING GUIDE 1943 room thermostat regulates: the supply of steam to.the unit through a control valve in the steam supply line and the unit heater motor operation is manually controlled.

HEATINC VENTILATINC AIR CONDITIONING GUIDE 1943 Large Open Hoods .Large hoods, such as may be used for electroplating and pickling tanks, should be sub-divided so the area of the connecting duct is not less than one-fifteenth of the open area of the hood.

HEATING VENTILATING AIR CONDITIONING GUIDE 1944 Exhaust systems (continued) rate of flow, 720 resistance of, 730 suction requirements, 719 types of fans, 731 velocity requirements, 733 Expansion of pipe, 328 tanks, 309 . valves, 478 Fan, fans, 373, 665 arrangement of drives, 576 attic, 429. 443 location, 444 types, 443 axial flow, 565 booster, 358 centrifugal, 565 characteristic curves, 568.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1944 The increased rate of heat transfer due to forced convection can be calculated from Equation 2b: where 2fc = 1 + 0.225 V (2b) qic -- heat transfer by forced convection, Btu per square foot per hour per degree Fahrenheit temperature difference. , ..

HEATINC VENTILATING AIR CONDITIONING GUIDE 1944 It is important to keep the lowest points of the steam mains and heating units sufficiently above the water line of the boiler to prevent flooding.

HEATINC VENTILATINC AIR CONDITIONING GUIDE 1944 obtain, as, for instance, in railway air conditioning.

HEATING VENTILATINC AIR CONDITIONING GUIDE 1944 stream and effecting uniform distribution over the entire face of the supply opening cannot be over-emphasized2.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1944 dust, wood shavings, wool, cotton and many other substances.

HEATING VENTILATINC AIR CONDITIONING GUIDE 1944 Power: The rate of performing work; usually expressed in units of horsepower, Btu per hour, or watts.