upr000049 295

IZvaporative-^Gupe Gaolers Ofre GZconomical to install A simple and effective means for keeping one’s home and place of business cool and livable during the sum­mer months in regions where humidity conditions are relatively low, is provided for by evaporative-type coolers. Evaporative-type coolers can be easily and economically constructed. As can be seen from the sketch at the right, it is simple to build—all material and parts can be bought locally at low costs. The usual method of con­struction of this type of cooler is to build a window box with an excelsior or fiber mat approximately two to three inches thick, placed in a vertical position with pro­vision at the top for dripping water through the pad. Cooling is produced by drawing large volumes of air over the moist mat, thus providing active circulation of cool air through the store or home. In order to obtain proper cooling it is necessary to circulate a sufficiently large volume of air to provide a complete change of air every two or three minutes. Below is given several helpful hints for building your own cooler and for properly operating it. On the re­verse side is shown several sketches illustrating the de­tails of construction of a simple cooler. Dimensions, as far as they concern the fan unit are given in the table on page two. Sketch showing the typical method of construction of an evapora­tive-type cooler. Details with dimensions given on page 2. 1. 2. 3. 4. Use (a) Use (a) Pad (a) (b) (c) (d) (e) a fan of ample size. The cubic-feet-per-minute air-delivery of the fan should equal one-third to one-half the total cubic feet of air-space in the house. ample evaporative pad surface. Approximately one square foot area for each one hundred cubic feet of air delivered per minute. construction Pad should be about two inches thick. Excelsior should be loosely packed. Use horizontal strips in the pad one inch wide to keep the excelsior from settling. Construct pad so that it can be removed and opened for replacing the excelsior. Pads can be placed on three sides of cooler to save space. With the improvements and increased efficiency offered by Wagner 3-speed, quiet-type, evaporative cooling fan assem­blies (Type K3 unit shown above), you can make, or have built a home cooler for less than $100.00. A cooler in which actual results have shown to produce 15 to 25 degrees drop in temperature from outdoors to indoors without increasing the humidity beyond the comfort point. Wagner evaporative cooling fan assemblies are available at prices ranging from $55.00 for 3speed fans suitable for cooling 4 or 5 to as low as $18.25 for cooling a single room. For your protection be sure to insist on Wagner evaporative cooling fans for your coolers. Operation 1. Regulate water flow so that there is practically no Make provision for evenly distributing the water at the top of the pad. waste. Open windows on opposite side of house to allow air to flow through freely. 5. Provide switch and water valve inside the house. 6. Locate air inlet high to prevent drafts. 7. Make cooler air-tight so that all the air must enter through the evaporative pad. 3. Do not recirculate any air. 4. On 3-speed fans the current consumption is greatly reduced on lower speeds. A fan having sufficiently large air capacity is necessary so that all rooms can be cooled progressively. Inasmuch as some moisture is added an outlet should be provided large enough to allow free air flow and prevent excessive (Over)