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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.
Issues that will be discussed in this article: Why is ventilation for the chick embryo as of 12 days of age in the setter and hatchery machines so important? Ventilation & temperature control during transport from hatchery to farm (truck). What is minimum ventilation in broiler houses? How to calculate the number of fans needed? What causes wet litter behind the evaporative...
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Respiratory problems are among the most important problems facing the poultry industry in Egypt. It is the first problem in poultry breeding farms, regardless of the type of poultry reared in these farms (broiler breeders- layer breeders- commercial broilers – commercial layers-native breeds). There are many factors that help to spread these respiratory problems in poultry farms such as:
- Little experience of the of the poultry farms managers in...
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Hello. If you know about utility of heat exchangers (Earny from Big Dutchmann or Clima + from Vencomatic or other) in poultry houses please share your information. From my research, the utility of the heat exchanger in could areas where you use direct heating (like G12 or other kind of heating with CO2 and water production directly inside of the house) is high. But if you use indirect heating (water heating or indirect heaters) and you have a minimum air exchange the utility of heat...
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Brian Fairchild (University of Georgia) explained the findings of his research on the correlation of litter moisture results between the traditional drying method and a commercial moisture meter, during IPPE 2018 in Atlanta, USA....
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Mitigating Heat Stress in Poultry Introduction Try blowing on your hand with it about an inch from your mouth. You should feel a warm breeze. Blowing out of one's mouth in cold conditions may result in what looks like steam - it's easier to watch someone else doing that. The 'steam' is water which came from your lungs as invisible water vapour, condensing due to the temperature of the air being below the dew-point. In your lungs its humidity was nearly 100% but it did not condense in there,...
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The brooding period is important to getting chicks off to a good start and influences flock performance. Depending on the market weight, the brooding period represents as much as 1/3 of the grow-out period. The chick is still developing and will grow rapidly during this period. The objective is to minimize stress on the chick so that the majority of the energy is directed towards growth and development. Below are five common issues seen during the brooding period that can have a negative...
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Brian Fairchild, Professor at the University of Georgia, discussed recent research on temperature, air speed and humidity on poultry housing conditions and ventilation, during IPPE 2017 in Atlanta, USA....
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On April 24-26, 2017, The UGA Hot Weather Management Workshop will be conducted at the Oconee County Civic Center in Watkinsville, Georgia, a few miles from the University of Georgia.
This intensive training program has been specifically designed for those who want to learn more about the design and management of modern poultry houses. The workshop consists of lectures as well as hands on group exercises designed to help attendees gain a firm understanding of...
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It is widely understood that tunnel ventilation is a necessity when it comes to keeping market-age broilers comfortable during hot weather. Air speeds of 600 ft/min or more combined with evaporative pad cooling of ten degrees or more have proven to not only help keep heat stress related mortality to a minimum, but enable the birds to continue to eat and grow during even the hottest summer weather. But, if we want to insure maximum bird performance, health and...
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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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In order to increase supplies of own-brand products and to become the leading supplier of Ha Ha food in China, Dachan invested in a large poultry complex in Cangzhou, Hebei province in 2008. The complex planned to construct an automatic slaughting workshop with daily capacity of 160,000 birds, a feed mill of 240,000 tons annual production, two broiler farms with each raising 160,000 broilers and hatcheries with annual capacity of 30 million chicks in the first...
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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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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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