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W: F. Hirschman Co., Inc. Venlilators "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. flotation 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 Interna! 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. The 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 unft 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 [Toncan] [Copper]. [Electric damper motor to be.supplied with these units]. They shall be the Effico Internal Louver Unit ventilators as manufactured by the W. F. Hirschman Co Inp Buffalo. N. Y. * Cowl 1 | Base Code for Telegraphy Effico Louver Unit Sizes and Dimensions Dimensions, Inches ABC D E Galvanized Steel Gauge Net Wght.. Lb. <s i a. <J 16 20 10 mi 23 24 24 90 16 24 30 14 40 30 22 22 140 18 30 36 14 50 32 22 20 f90 20 36 42 18 60 32 22 18 225 24 42 46 22 68 43 22 18 350 24 46 54 24 76 43 22 18 400 24 54 60 24 86 43 22 18 600 24 60 66 24 98 43 20 18 710 24 66 72 30 wiVi 49 20 18 800 24 72 80 30 114 54 20 18 880 24 84 92 36 130 54 18 16 1050 24 96 116 45 153 54 18 16 1200 24 van For round bases, "E" dimension remains the same. 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: Patented May 20, 1922; March 20,1928. 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 are also supplied. Open Closed The Multiple Circular Louver Damper in Neck of Ventilator CAPACITY--Exhaust capacity same as Effico Head-- note opposite page, for F Electric Ventilator see next page. 856 W- F. Hirschman Co., Inc. Ventilators Hirschman's S E and F Roof Ventilators For our Effico Ventilator see preceding pages Recommendation of F Electric Ventilator--Is a high class ventilator where a high exhaust velocity is required at certain periodical times or resistance (static pressure) is encountered. Where our Effico Rotary Head, or the Effico Wind-Electric Automatic Ventilator, due to obstructed location or its moderate, even capacity is not required, then we recommend the Hirschman F Ventilator. Dampers--Chain, pneumatic or elec trically operating; close fitting damper supplied with all sizes if required. Fire F Electric Ventilator Non-Automatic (Patented) With Electric Damper Motor--Condenser Motor, Brushless, Damper--with fusing link furnished if required. There are no outside louvers to freeze or blow shut. Ciimmutatorless, Variable Speed, fully As an Exhaust Head enclosed, very quiet running, are furnished at extra cost when above characteristics are essential. FOR EXHAUST FAN SE Ventilator design is such that air driven 1200 ft. velocity DIMENSIONS OF HIRSCHMAN F. VENTILATORS through the head, registers Dimensions, in Inches Thickness of Metal only .015 water gauge static AC D E F Ga. Galvan. Head Base Or. Copper Head Base pressure a performance of unequalled merit. Thus for a fan or high heat exhaust 12 9`/2 22 18 141/4 32 24 16 24 22 24 24 24 18 42 30 30 24 30 22'/2 52 30. 36 22 36 27 61 Vl 30 42 22 42 317/s 71 48 36 81 30 48 36 54 20 18 54 393/4 91 36 60 18 60 45</4 101 36 66 18 66 52 110 36 72 . 18 72 60 120 36 78 18 84 65 140 36 92 18 24 16 24 16 22 16 20 18 16 20 18 20 18 20 18 20 16 24 16 24 16 - 24 16 24 16 16 18 20 24 24 24 24 24 32 32 32 . head, it is highly effective. When so used and the fan is cut off the ventilator still operates as a syphon venti lator. There are no shut ters to blow or freeze shut. Is also vision-proof, will resist back drafting during a five mile wind against an adverse temperature differ . CAPACITIES HIRSCHMAN F ELECTRIC VENTILATORS ence of 10 deg. fahr. Also Size of Stack Inches Fan Speed R.P.M. Capacities--C.F.M. Static Horse- Pressure in Inches of Water Power w or Less V*' j/." Vi' yT Motor Ship ping Weight 12 1750 1/20 725 400~" 1150 1/50 250 S.D. too S.D. 1750 Vs 1500 900 S.D. 18 1100 1/6 1500 900 520 200 S.D. 850 1/20 820 S.T.D. '24 1100 1150 'A 1 3000' 2200 1600 1000 S.D. 4800 4200 3800 3000 S.D. 225 825 v. 2600 1500 920 S.T.D. ''1080 860 Vi 'A 5000 4000 2700 2000- S.D. 4000 2900 1900 S.D. 300 36 1080 680 Vl 6000 5400 4600 5500 4600 3600 S.D. S.T.D. > 680 1 465 1'l2l 6200 5000 S.D. 525 9000 6600 5700 4000 S.T.D. 575 48 680 t'/l 14000 9000 S.T.D. during the same wind veloc- OXv SSQ'irule.i'en"tt a`tygwreialltneor ttbhaacnk-sdtraatfict unplreesss sure resistance of .025 water O X 0 X gauger For information on wind pressure causing down draft in the angle of U or L X buildings, write us. 0 X X 0 X 0 0 0 Prefix letters in Motor Column indicate kind of current for which the motors are available. ("S" Alternating--single-phase, 60 cycle). ("T", two or three-phase, 60 cycle). ("D", dired current). "X", Very silent suitable for Talkie Movies. "0", Silent for schools, theatres; auditoriums and other quiet running require- SE Ventilator The head of the "F" Electric Ventilator sold separate:-- makes an excellent Syphon' Ventilator. meate' REMEMBER--With the Hirschman F Ventilator you still have a good ventilator when the motor is not running. .857