r American Society of Heating and Ventilating Engineers Guide, 1937 s 7Chapter --Heating Load 3.

American Society of Heating and Ventilating Engineers Guide, 1937 Hartford Return Connection In order to prevent the boiler from losing its water under any circum stances, the use of the Hartford Connection, or the Underwriters Loop, is recommended.

The Torrington Mfg.

------ i U-IH-W-J.II.II Officers and Council American Society of Heating and Ventilating Engineers 51 Madison Ave., New York, N.

Heating Ventilating Air Conditioning Guide 1938 Table 6.

Heating Ventilating Air Conditioning Guide 1938 connection must be nearer the heater than the return connection.

Heating Ventilating Air Conditioning Guide 1938 perature results in an increase in length of the pipe for which provision must be made.

T a b l e 1.

Heating Ventilating Air Conditioning Guide 1938 The resistance of a well-designed unit filter of the adhesive impinge ment type usually depends upon the velocity at which the air is handled and upon whether the unit is clean or dirty.

Heating Ventilating Air Conditioning Guide 1938 Table 17.

Heating Ventilating Air Conditioning Guide 1939 Table 8.

Heating Ventilating Air Conditioning Guide 1939 trated in Fig. 6, are not to be generally recommended for hot water sy$. terns unless the water temperature can be maintained at a reasonably high temperature and rapid circulation of the water can be .obtained PROBLEMS IN PRACTICE 1 What are the principal differences between a radiator and a convector?

Heating Ventilating Air Conditioning Guide 1939 200 ft preferably employ the smaller pressure drop while systems over 200 ft equivalent length of run more frequently go to the higher drop owing to the relatively greater saving in pipe sizes.

Heating Ventilating Air Conditioning Guide 1939 This resistance can be supplied by a calibrated and adjusted modulating valve v. an orifice resistor in a union.

Heating Ventilating Air Conditioning Guide 1939 2.