Document rBem8K91YBo4RXXR44aoO3a7

Ventilators W. F. Hirschman Co., Inc. Buffalo, N.Y. Works: Le Roy, N.Y. New York, N.Y., 525 Sixth Avenue Boston, Mass., 37 Pearl Street Detroit, Mich., Buiidera-Trade Exchange MANUFACTURERS ROOF VENTILATORS "EFFICO'* WIND-DRIVEN ROOF VENTILATORS: The Effico Ventilator consists of a wind-driven 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 hall bearings, are solidly enclosed and oil-flooded (also dust and scid 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 Rotary Bali Bearing Ventilator Installation, Wind Driven (only) Tie Effico Wind Electric AIso HastheSomeArtistic Lines and Pleasing Appearance. Lowest in Height of Rotary Ventilator* by Over 50 per cent Average. All EfEcoe will draw considerable air ata 1-mile breeze (an apparent calm) without stack or heat assistance. The 30-in. size will rotate (standing start) at .7-os. pressure. VS-mile.breeze, Cowl outlet is over 50 per cent larger than its stack area; this is ample, as no wind enters ventilator to gain the so-called siphonage effect. Suction fan is same size as rotating cowl. Thus each Effico is equipped with fan over SO per cent greater in diameter than its stack area. Fan pulls air up stack at even the slowest turning movement and wind blowing acroes Detail ofEffico Wind Electric Rotary Ball Bearing Ventilator Fall Automatic Note.--Details of Wind Driven (only) Ventilator are Identical with Exception of Motor Unit. the outlet adds to its efficiency. CAPACITIES OF EFFICO ROTARY BALL BEARING VENTILATORS _. . . i i* i i\ __-- /__i_\__r.( At* RrhanatMi ivr Minute Wind Velocity. Miles per Hour 5 10 14 S 10 14 5 10 14 Bold Type is Regularfy Furnished Wind-Elcxtric Capacity Temperature Difference in Degrees Fahrenheit in Building and Outside 0 10 20 30 0 10 20 30 .0 10 20 30 12-ln. Ventilator 18-In. Ventilator 24-In. Ventilator 350 440 430 525 400 600 515 600 635 560 625 700 600 910 1050 850 1050 1200 950 1200 1300 1040 1300 1400 1020 1600 1490 1900 1800 2230 1780 2100 2460 1900 2300 2590 30-In. Ventilator 36-In. Ventilator 42-In. Ventilator 1360 2300 2300 3210 2690 3490 2900 3600 2300 3400 3250 4200 3810 4720 4100 5050 3150 4500 4390 5700 5010 6300 5500 6800 2900 3650 3850 4020 4040 4000 5300 5600 5600 6700 7400 7800 48-In. Ventilator 54-ln. Ventilator 60-In. Ventilator 4000 5900 7000 5900 6700 7400 7900 8900 9050 9000 10000 10500 5100 7300 8450 9500 6500 9300 10600 11900 7850 9900 11000 11500 9200 12500 14000 14500 9500 11800 12500 12800 11400 14000 15000 16000 Effico Wind Electric Ventilator Dimensions Ventilator. Dimensions in Inches--(See Diagram Above) ThicknessofMetal Sizes Corre sponding to Those in Table Opposite A BC D E Actual Size of Ventilator for Height Diam. of Height to Base Storm Propeller Wind'Elec. Type Blades Band Blades Gauge G. f. Up-, Cop- of Motor Oz. Cowl Base 18 L..42 14 19 25 37 43 20 8 2P/* 76 10 im 38 14 40 40 14 . 50 44 18 60 50 22 68 56 24 76 32 32 40 42 45 51 51 24 22 16 ] 24 22 18 1 1/30 24 20 18 24 22 20 18 20 24 ./ 22 18 24 J 22 18 24 55 62 24 86 51 22 18 24 60 61 66 24 98 55 22 18 24 1 I nv ai^arsuis is dujuautuic w uuiu t,uus ----------------- ---------- w rises and is regularly sullied at capacities of 5 miles per hour wind and 10 deg. temperature difference rating. The Wind-Electric will exhaust minimum volume regardless of tempera ture difference or wind velocity. Any other capacity can be supplied and the ventilator is adjustable to any constant capacity after installation. 816 Effico Wind Electric Ventilator, Automatic Patented May 20, 1922; March 20, 1928; August 21, 1928. The Effico Wind Electric Ventilator, Full Automatic Recommended for those in stallations which require a definite minimum exhaust at all times or which may require an unusually heavy exhaust at intermittent periods. This is the regular Effico equipped with an auxiliary electrically operaated fan placed in the ventilator throat just below the regular fan. The throat is slightly en larged to allow for the motor. Handsomely painted in red ot any desired color aud made of galvanized sheets. Also in copper, monel metal, lead clad, aluminum, Cop-r-loy. extra-re fined Cop-r-loy. W. F. Hirschman Co., Inc. Venlilators 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. Instantly, 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, the motor is of fully enclosed type, will run for six months with out oiling, will not heat under constant running. 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, thus allowing a great volume of air to be exhausted at will. Effico Internal Louver Unit Ventilators The Effico internal louver unit comprises the Effico rotary ball bearing ventilator head con structed 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 adaptable 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 con nected by means of angle iron companion 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 underneath 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. Heads only. Effico Heads without dampers are also supplied. Suggested Specificatons The roof ventilators shall be of the sizes as shown in plans, [square base] [round base] style to be made of [galvanized steel] [Cop-r-loy] [copper]. [The pneumatic damper motor to be supplied with these units]. [Shall be supplied by the heating and ventilating Contractor]. They shall be the Effico Internal Louver Unit ventilators as manufactured by the W. F. Hirschman Co., Inc.. Buffalo, N.Y. Cowl I Copper, Oz. Code for ' Telegraphy Effico Louver Unit Sizes and Dimensions Dimensions, Inches A BC D E Galvanized Stee Gauge > 5 CQ Net Wght.. Lb. 18 20 10 24 30 14 30 36 14 36 42 18 281/2 23 24 24 40 30 22 2? 50 32 22 20 60 32 22 18 90 16 140 18 190 20 225 24 48 22 48 54 24 54 60 24 66 76 86 43 22 18 43 22 18 43 22 18 350 24 400 24 600 24 60 66 24 98 43 20 18 66 72 30 103'/, 49 20 16 710 24 800 24. 80 30 114 54 20 18 880 24 84 92 36 130 96 HP 45 153 54 18 16 1050 24 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 speci fications below). 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. Effico Rotary Ball Bearing Ventilator Head The Effico rotary ball bearing ventilator head is already lower in height by 50 per cent than other rotary types of ventilator. By using the con struction as., outlined above, the entire unit is brought as low to the roof as is permissible to still allow the air free exhausting, and to maintain the outlets above the snowline. By adopting the. circular multiple louvers, of which we are the in ventors, we can standardize on sizes and build the round louver for considerably less than the square or rectangular styles, many $>f which we have built in the past years. By installing same in the neck of the ventilator at our shop, we not only give a perfect fit, but also eliminate all indefiniteness as to the correct location and size of the damper and cut the installing cost to one-quarter. It is also easier to install the operating motor and makes it more accessible. The size of the damper is the full size of the stack, and yet is about 40 per cent smaller in area than those here tofore used in the square or rectangular louver, again reducing the cost considerably. By supplying the contractor with the complete unit the builder is assured of a well designed, uniform and complete apparatus. Heretofore, the contractor purchased the venti lator from one manufacturer, probably built the roof base himself, and purchased the dampers elsewhere, or even the dampers were supplied and installed by another contractor. This added materially to the cost. Patented May 20,1922; March 20, 1928. Open Closed The Multiple Circular Louver Damper in Neck of Ventilator 817