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Ventilators W. F. Hirschman Go., Inc. . Main Office: Buffalo, N.Y. Works: Le Roy, N.Y. New Yon*. N. Y. 205 East 42nd Street Philadelphia, Pa. 1338 Spring Garden Street . MANUFACTURERS ROOF ~Boston. Mass. 37 Pearl Street VENTILATORS Detroit, Mice 97 W. Warren Are. . Principle of Operation of Wind-Electric Ventilator--When the wind is blowing sufficiently to remove the desired amount of air from the build ing being ventilated, the electric motor is still. In stantly, when the wind turbine moves below a previously determined number of revolutions, the electric motor starts automatically and carries the load. The entire apparatus is noiseless. Special Advantages--Besides the regular auto matic: operation the motor may also be so connected as to give a maximum exhaust capacity (running full speed) by manual control. Effico Rotary Ball Bearing Ventilator Installation, Wind Driven (only) The Effico Wind Electric Also Has the Same Artistic Lines and Pleasing Appearance. Lowest in Height of Rotary Ventilators by Over 60 per cent Average. Detail of Effico Wind Electric Rotary Ball Bearing Ventilator Full Automatic Note.--Details of Wind Driven (only) Ventilator are Identical with Exception of Motor Unit. CAPACITIES OF EFFICO ROTARY BALL BEARING VENTILATORS Both Wind Electric and Wind Driven (only)--Cubic Feet of Air Exhausted per Minute Wind Velocity. Miles per Hour Bold Type is Regularly Furnished Wind-Electric Capacity Temperature Difference in'Degrees Fahrenheit in Building and Outside 0 10 20 30 0 10 20 30 0 10 20 30 12-in. .Venttlatpr 18-In. Ventilator 24-In. Ventilator 5 330 440 51$ 560 600 850 950 1040 1020 1600 1760 1900 10 430 525 600 625 910 1050 1200 1300 1490 1900 2100 2300 30-ln. Ventilator 36*ln. Ventilator 42-In. Ventilator 5 1560 2300 2690 2900 2300 3400 3810 4100 3150 4500 5010 5500 10 2300 3210 3490 3600 3250 4200 4720 '5050 4390 5700 6300 6800 . 48-In. Ventilator 54-In. Ventilator 60-In. Ventilator 5 4000 5900- 6700 7400 5100 7300 8450 9500 6500 9300 10600 11900 10 5900 7900 8900 9050 7850 9900 t1000 11500 9200 12500 14000 14500 Ventilator Sizes Corre sponding to Those in Table Opposite Effico Wind Electric Ventilator Dimensions Dimensions in Inches--(See Diagram Above) iliickness ofMetal A BC D E Actual Size of Height Diam. o! Height to Ventilator for Base Storm Propeller Wind Elec. Type Blades Band Blades Gauge Hp. G. 1. Cop of per. Motor Oz. Cowl Base Effico Wind-Electric Ventilator, Automatic Patented May 20. 1922; March 20. 1928; August 21, 1928. The Effico Wind Elec-' trie Ventilator, Full Automatic Recommended for those installations which require a definite minimum ex haust at all times or which 12 18 ' 24 30 36 42* 48 . 54 60 14 19 25 / 31 . 37 43 . 49`- 55 . 61 20 8 2ty, 26 10 28'/; 38 14 40 40 14 50 44 18 60 50 22 68 56 24 76 62 24 86 66 24 -J 98 32 32 40 42 45 51 51 51 55 24 22 16 24 22 18 24 20 18 24 20 20 22 18 24 22 18 24 22 18 24 22 18 24 22 18 24 1/30 1/6 1/4 . Hus apparatus is adjustable to exhaust various quantities of air within the limits of given sizes and is regularly supplied at capacities of 5 milts per hour wind and 10 deg.' temperature difference rating.- The Wind-Electric will exhaust minimum volume regardless of temperature difference dr wind velocity. Other capacity can be supplied and the ventilator, is adjustable to any constant capacity after installation. may require an unusually heavy exhaust at inter mittent periods. This is the regular Effico equipped with an auxiliary elec trically operated fan placed in the ventilator throat just below the regular fan. The throat is slightly enlarged to allow for the motor. For F Electric Ventilator Non-Automatic see second page following: 902 [ W. F. Hirschman Co., Inc. Ventilators "Effico" Wind-Driven Roof Ventilators The Effico Ventilator consists of a winddriven head to which suction blades are permanently connected (on the underside) making an efficient exhaust fan. Rotation of the head creates an exhaust suction in the throat of the ventilator. There are no moving parts. Bearings.--Effico Bearings are full ball bearings, are solidly enclosed and oilflooded (also dust and acid proof). They are as sturdy" as the best automobile bearings, and will run in a dry state for years, but we oil-flood them as an extra precaution. Effico Internal Louver Unit Ventilators The Effico internal louver unit comprises the Effico rotary ball bearing ventilator head constructed with a specially short base, or neck. In this base is built a circular multiple blade louver damper. *Fhe damper is carefully balanced and heavily constructed. The blades lap and are fitted in a circular frame. It is adapt able for manual control, but is intended for a thermostatic control system. The roof base is very low, is part of this unit and is supplied with either the square or round base. The roof base and the ventilator head are connected by means of angle iron com panion rings, which give solidity and facilitate the taking down of the ventilator when required. Each ventilator neck has also a tight fitting door to give free access to the louvers and to the operating motor. The operating motor is suspended under neath the damper to a cross brace. The object of the specially low base and the low roof base is to make the entire unit as low to the roof as possible. Suggested Specifications The roof ventilators shall be of the sizes as shown in plans, [square base] [round base] style to be made of [Tuncan] [Copper], [The pneumatic damper motor to be supplied with these units]. They shall be the Effico-Internal Louver Unit Ventilators a3 manufactured by the W. F. Hirschman Co., Inc., Buffiflo, N. Y. Effico Louver Unit Sizes and Dimensions Dimensions. Inches A BC D E Galvanized Steel Gauge Net Wghc. Lb. Cowl I Base Copper, Oz. Code for Telegraphy 18 20 10 281/j 23 24 24 90' 16 vale 24 30 14 40 30 22 27 140 18 valet 30 36 14 50 37 72 70 190 20 36 42 18 60 32 22 18 225 74 42 48 22 68 43 22 18 350 74 48 54 24 76 43 22 18 400 74 vax 54 60 24 86 43 22 18 600 24 60 66 24 98 43 70 18 710 24 66 72 30 103'/, 49 20 18 800 24 vamp 72 80 30 114 54 70 18 880 24 84 92 36 130 54 18 16 1050 74 96 116 45 153 54 18 16 1200 24 van. For round bases, " K " dimension remaios the Bame. For capacities note preceding page. Effico Louver Dampers Made'of stretcher leveled sheet steel. The pneumatic damper motor is supplied and installed with these units unless not desired. (Note specifications below). Electric Remote Control Also supplied to operate any of our dampers. Effico Louver Unit Low Height. The.Effico louver unit sets very low (note dimensions at right). Height above Coping Louver Unit "C" dimension should be above coping. Note above. Heads Only. Effico Heads without dampers arc also supplied. CAPACITY--Exhaust capacity same as ..Effico- Head-- note opposite page, for F Electric Ventilator see next page. 903