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    f Wickes Lumber Allentown, PA Ephrata, PA Exton, PA Frederick, MO Greensboro, PA 681 State Road 82 Garden Spot Rd. 145 S. Whitford Rd. 5219 Urbana Pike Route 136 (215)967-3181 (717)733-6521 (215)363-9550 (301)662-4107 (412)527-3531 Harrisburg, pa Phillipsburo, NJ Reading, PA Succasunna, NJ Swedesboro, NJ 7|l Amp-Wok Dr. 199 Strykers Rd. 2591 Centre Ave. 39 Route 10 Rt. 322 ('17)564-4453 (908)859-3600 (215)921-0606 (201)584-6630 (609)467-0846 years ago, it would require only 42 days to produce a bird to the same weight using today’s broiler. Unfortunately, this significant improvement in performance has come with a cost attached. That cost can be expressed in a number of ways; however, in most cases it can be stated that birds are much less forgiving of their environment than in years past Producers must be much more aware of maintain ing proper temperature and desir able air quality. Low temperatures and elevated levels of ammonia can trigger ascites today, whereas several years ago that was not the case. Conversely, high tempera tures during the summer can cause significant mortality and loss of performance among broilers. Tunnel ventilation, a concept introduced in the southeastern U.S. EVEFYTHUVG YOUU NED! ■V ;r salespeople and you’ve got it all! Computer Aided Customizing! Any of our package designs can be tailored td suit your needs with our Computer Aided Design capabilities. Ask a Wickes Lumber associate for details! several years ago, has significantly helped to reduce mortality during the hot times of the year. By plac ing a number of fans in one end of the broiler house and allowing the air to enter from the other end, per mitting the long axis of the house to act as a tunnel, air is moved down the length of the house at a velocity of between 350 and 400 feet per minute. The wind chill effect of the column of air provides meaningful cooling for the birds. Research has shown that broilers, when exposed to ambient air at 95 degrees Fahrenheit (F) and a vel ocity of 350 feet per minute (f/m), sense the air as if it was at approxi mately 70 F. The calculations required when designing a tunnel ventilation sys tem are not difficult. First one must determine the cross section area of the broiler house; the height x width of the house. For example, let’s assume that the house is 44 feet wide and has an average ceil ing height of 10 feet, giving a cross section area of 440 square feet. Further, to determine the fan capacity required, one must simply multiply 440 square feet x 400 f/m (air velocity down through the house) to arrive at the cubic feet per minute (cfm) of fan capacity required for the tunnel system. In this case, 176,000 cfm of fan capacity, or approximately nine wy-Duty mg Door racks & trdware 48-inch, fans, are needed. These fans should be controlled with thermostats and located in one end of the house. The other end of the house must be equipped with areas to allow au to enter. These areas are normally a section of curtain on both sidew alls. Again, the calculations to determine the amount of this open ing are simple. The opening must be equal to or slightly larger than the cross section of the house 440 square feet. Let’s assume that the curtain opening is three feet wide and continuous on both sidewalls. Therefore, to'provide an opening of 440 square feet, a length of 74 feet (440 square feet divided by 3 —147 feet divided by 2 = 74 feet) must remain open on both sides of the house when the ventilation system is operated in the tunnel mode. An additional feature that is included with most tunnel systems is fogging nozzles. The nozzles normally emit from two to three • Streets • Farm Lanes • Parking Lots • Roads • Recreation Areas * Driveways - FREE Call Now For Prompt Courtaoua Sarvlce 800-422-8107 Ell EI Ak. CDCALICOCONCRETE 717-336-7591 74 Kurtz Rd . f Denver, PA Crushed Stone • Asphalt Paving • Ready Mixed Concrete & COMFORTABLE 8601 m a "SUPER!" AAIAIBICI D I E I EE I H H4 6-16 8-13 5-16 M 3 U-m| M 3 HOURS; Daily 8:30 A.M. to 6 P.M.; Frl. 'til 8 P.M. W uncister Farming, Saturday, June 18, 1994-C9 |T A RAY OFpf DS^ Wayne’s Dry Goods 271 W. Main St. Kutztown, Pa. Phone (215) 683-7686 gallons of-water‘per hour at approximately 200 pound per square inch (psi) and are located in bands across the house. The first band of from six to eight nozzles should be located near the point where air enters the house and the last band should be located approximately 100 feet from the fan end of the house. Intermediate bands are normally located 60 to 75 feet apart. Design criteria for the nozzle system normally allows for approximately nine gallons of water per hour per 1000 square feet of floor space. When atomized properly, this amount of water will cause reductions in temperature of from five to eight degrees. While additional cooling with tunnel ventilation and foggers was not required to produce broilers just a few years ago, it has become a necessity with today’s fast growing birds. If you have not looked into tunnel ventilation as a way to cool your birds during the hot times of the year, possibly now is the time to do so. LIGHT & SOn & CUSHIONING in your size! B I D I E [EEE 8-15 6-16 | B-13 I 7-12 Fit, comfort and long wear make this one of Red Wing’s most popular shoes for work. m . ■! SB