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Poultry ventilation
Ventilation in a poultry house supplies fresh air that is essential to sustain life. It also helps reduce the extremes of temperature, humidity and air contamination to tolerable limits for confined chickens. Improved ventilation systems have also made possible the high density populations of livestock and poultry in confinement, thus reducing the building cost per unit housed. This is economically important since it reduces production and labour costs. Ventilation air removes excess heat, moisture, dust and odours from the building and, at the same time, dilutes airborne disease organisms. Properly designed winter systems also conserve energy by utilising heat generated by the birds. Providing proper ventilation to poultry is an art but it can be mastered by any determined and willing poultry grower. It is a challenge, however, since poultry houses are different and ventilation requirements change with time of day, season, temperature, humidity, wind, bird age and density.
The summer of 2016 has arrived rather abruptly and with full fury, finding many poultry farmers as well as chicken totally unprepared to face the onslaught. During my conversation with people, I noticed that many are not aware of how exactly summer heat damages and kills birds. I also come across well meant summer management measures that are often either inadequate or counter- productive. People do not know why, for example, most birds die from heat stress mostly...
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Figure 1. Static pressure Vs. inlet air speed. One of the most common questions producers have about ventilating poultry houses during cold weather is "What is the optimal static pressure?" The short answer to...
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What would be the best solution when temperature is 35c or plus broiler chicks are day old? what kind of fan, pad and water rates are good to control temperature and avoid chilling of birds?The system is Roxell/Fancom. ...
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As target bird sizes continue to increase so does the difficulty in keeping the birds cool during hot weather. Whereas 400 to 500 ft/min has traditionally worked well for smaller broilers, today’s larger 8 lb+ birds can require substantially higher air speeds to keep them growing during the summer months. Growers are often increasing their tunnel fan capacity 50% or more in their older houses to obtain air speeds of 600, 700, or even 800...
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Bacillus amyloliquefaciens CECT 5940 (Ecobiol®) go beyond performance in broilers under enteric pathogen challenge compared to antibiotic growth promoter and other commercially available probiotics
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Can anyone please help me how to calculate measures of minimum ventilation in broiler breeder houses which are totally enviornmently controlled?? ...
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One of the biggest challenges with maintaining optimal air quality during cold weather is the fact that much of what we are trying to control is constantly being generated. For instance, if we had an empty house and filled it with smoke we could turn on a few exhaust fans and within minutes the smoke would be gone - problem solved. But, when it comes to gasses such as ammonia and carbon dioxide which are constantly being generated, it is a never-ending process to...
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In order to control the environment within a poultry house it is essential that a producer not only controls how much air is entering the house, but where it is entering. For instance, during cold weather essentially no air should enter a house when the fans are off. When the fans are operating, all the air should enter through the air inlets so it can be directed along the ceiling toward the center of the house to insure it is preconditioned by the warm air next...
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Figure 1 shows the outside temperature and relative humidity during the last three weeks on a farm growing a 56-day-old broiler during the month of August in 2013. Though the weather was relatively mild, outside temperatures still...
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Far too often when comparing tunnel fans one of the first things people look at is the size of the motor. The thought being, the smaller the motor size, the less the fan will cost to operate. Though in general this is true, the fact is that not all motors of a given size will consume the same amount of power. For instance, Figure 1 illustrates the range of power consumed by 158 different 48" fans tested by BESS Laboratory. Though all the fans were...
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Figure 1. Weatherflow Wind Meter. Figure 2. Weatherflow Wind Meter connected to Iphone. ...
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Table 1. Daily heating costs as a function of inside/outside temperature difference (Day 0 - 6). ...
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There is a common misconception that a poultry house with a higher ceiling will have a significantly higher heating costs than one with a lower ceiling. The truth is that how much it costs to heat a poultry house has much...
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There have been long discussions that what would be ideal house length here in Pakistan where ,on an average,height of ceiling is eight feet and it is flat concrete unlike Europe or USA. Long lengths create pressure, due to air resistance, and reduce efficiency of fans and short lengths are in inefficient for power consumption for the same air velocity. Waqar from Pakistan. The Automation Company ...
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Figure 1. Example of solar radiation shield. Having an accurate outside temperature sensor wired into a house's environmental controller can be helpful in managing the environment within a poultry house. During cold...
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Current market review and perspective of Florfenicol, Tilmicocin, vitamins and aminoacids
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Figure 1. Study house with evaporative cooling pads removed. Though evaporative cooling pads can do a great job of keeping our birds cool during hot weather by reducing the temperature of the incoming air 20o F or...
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Often the bird-cooling ability of a tunnel-ventilated poultry house is measured in terms of average air velocity. An average air velocity is generally determined by averaging multiple air velocity measurements taken across the cross-section of a house approximately 100' from the tunnel fans. Though this will provide some measure of how capable a house is of keeping birds cool during hot weather, air speed uniformity is of equal or possibly greater importance. For...
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Managing proper litter moisture during cold weather with low outside air temperatures, loose houses, low air exchange rates and high fuel prices has been and always will be a challenge. But, many producers are now finding maintaining good litter quality during hot weather can be equally as challenging, even in the best of housing. One of the primary reasons why it is becoming more difficult to control litter moisture during hot weather is the trend towards...
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When it comes to operating any air inlet system during the cooler times of the year it is important to keep in mind that our primary objective is to maximize the amount of fresh air we bring in without causing excessive decreases in air temperature or excessive increases in fuel usage. Quite simply, the more air we can bring in without decreasing house temperature, the fresher the air will be, and the better our birds will perform. For instance, let's say you have older birds...
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Figure 1. Air velocity poles in a 50' X 560' totally enclosed broiler house. To produce optimal cooling of large broilers during hot weather most houses today are being designed to obtain a wind speed of between 600 and 750 ft/min. It is important to realize that a...
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Allan Riis Larsen, Area manager at SKOV, speaks about their ventilation systems, especially the Combi-Tunnel ventilation, a system designed for regions with heavy daily or seasonal temperature fluctuations during his visit to their representatives in Mexico, JAT at FIGAP/VIV 2012. ...
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