Explore all the information on
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.
Importance of air quality control in poultry farms Air quality control in poultry production is key to maintain animal welfare , which is closely related to productivity and absence of diseases. When the air components are not in...
Comments : 42
Recommendations: 1
Poultry industry experts at the 2025 Latin American Poultry Summit will present information on factors that affect the efficient marketing of poultry farming. The program is organized into five sessions – grain management, food safety, genetics, breeding and health – and will take place on Monday,...
Comments : 0
Recommendations: 0
Recommended events
January 28, 2025
United States - Georgia - Atlanta
In a negative pressure-ventilated poultry house, the amount of air entering through each side wall inlet depends primarily on the level of negative pressure generated by the house exhaust fans, the size of the inlet opening, and the air inlet design. The higher the static pressure, the faster the air will enter the house and...
Comments : 0
Recommendations: 0
It is well known that the higher the static pressure, the faster the air will enter through an air inlet and therefore the greater the amount of air which will enter through the inlet. But how precisely does velocity change with pressure and similarly how does the amount of air entering through an inlet change with static pressure? To answer these questions, the performance of typical 44" X 7" (42.75" X 5.75" actual opening) and 44" X 14" (42" X 10.75" actual opening) galvanized door inlets...
Comments : 0
Recommendations: 0
When building a new house or retrofitting an older one, tunnel fan selection is one of the most, if not the most important decision a producer has to make. A house’s fans are essentially the engine of the ventilation system and as a result have a significant effect on a producer’s ability to maintain the proper environmental conditions throughout the year. Furthermore, with rising electricity prices, selecting the right energy-efficient fan can save a producer thousands of...
Comments : 0
Recommendations: 0
Though it may not seem like it, each one-foot section of a five-foot-tall, six-inch pad has a tremendous surface area... well over 300 square feet. As a result, a house with two 70' X 5' evaporative pad systems has over 42,000 square feet of pad surface area from which water can evaporate and cool the incoming air. When we look at a 70' X 5' pad system, we can only see the 350 square feet of surface area, not the over 21,000 square feet of (60 times) interior pad surface...
Comments : 0
Recommendations: 0
.jpg&w=3840&q=75)
A 54" tunnel fan with a 1.5-hp motor is running and consuming 1,700 watts of power. The belt suddenly breaks and the fan blades stop rotating, but the motor continues to spin. How much power do you believe the motor is now consuming? 1,700 watts? It is important to understand that the primary factor determining how much power a fan will use is how fast the motor is spinning the prop. The faster the prop spins, the greater the amount of work required, and the greater the amount of power used...
Comments : 0
Recommendations: 0
A poultry house controller's temperature sensors are, in a sense, its "eyes" enabling it to “observe” what is happening throughout a poultry house so it can accurately determine what equipment it needs to operate to maintain the proper environmental conditions throughout a house. As a result, a...
Comments : 0
Recommendations: 1
Administration of yeast fraction reduces outcome of Salmonella Typhimurium challenge on broilers
Suggested link
When designing a tunnel-ventilated house, it is important to install the proper amount of evaporative cooling pad. Too little pad will result in excessive static pressure, which will reduce air speed, and therefore bird cooling. Too much pad will result in increased initial cost, more pads to maintain/replace, and a larger area of reduced air movement near the tunnel inlet end wall. Pad area is based not on the size of a house but rather on the air-moving capacity of a house's...
Comments : 0
Recommendations: 0
Using evaporative cooling to keep birds cool during hot weather is relatively simple. Water is circulated over paper pads. Tunnel fans pull hot outside air through the pads and into the house. As the air moves through the wetted pads, its temperature decreases. Fairly straightforward. On the other hand, understanding how evaporative...
Comments : 0
Recommendations: 0
What is litter? Litter and its management are an essential part of bird management and ensuring bird welfare. This goes for broilers, turkeys, or laying hens kept on litter floors. Litter is a combination of the bedding used within a house combined with the excreta from the birds. Good quality litter provides...
Comments : 0
Recommendations: 0
You are frying eggs for breakfast. You get distracted and the next thing you know your eggs are burning and your kitchen is filling with smoke. What do you do first? Open the window to get rid of the smoke or remove the skillet from the stove to stop the generation of the smoke? You of course, remove the skillet from the stove, then open windows because opening the windows in itself doesn't solve the problem, because your eggs are still burning and filling the kitchen with...
Comments : 0
Recommendations: 1
Supplemental dietary methionine sources have a neutral impact on oxidative status in broiler chickens
Suggested link
Tom Tabler (University of Tennessee) explains how sprinklers work and their impact on feed conversion, weight gain, and bird performance, in this Engormix interview during IPPE 2024 in Atlanta, USA....
Comments : 0
Recommendations: 1
Mike Czarick (University of Georgia) explains how important it is to have the right combination of static pressure and inlet opening, as well as considering outside temperature, in this Engormix interview during IPPE 2024 in Atlanta, USA....
Comments : 0
Recommendations: 0
Mycotoxin Testing in the Feed Chain: A Risk Prevention Strategy for Raw Material Suppliers, Grain Storage Facilities and Processors, and Feed Manufacturers
Suggested link
A fast-growing broiler produces a surprising amount of heat, roughly 10 - 15 Btu/hr per pound of body weight. To put this in perspective, a single match produces one Btu/hr of heat which means that a four-pound broiler has essentially 40 to 60 matches of heat being produced within it. An eight-pound broiler would have 80 to 120 matches of heat within it, heat it must continually rid itself of in order to maintain a normal body temperature. As a bird’s body temperature increases,...
Comments : 0
Recommendations: 0
Managing by the “average” of anything can be a potentially dangerous concept when it comes to growing birds. For instance, when tunnel ventilating market-age broilers the average house temperature could be 80°F, which isn’t necessarily a problem, but it hides the fact that it could be 70°F at the pad end and 90°F at the fan end of the house which definitely would be dangerous. During cold weather, an average daily relative humidity of 60% seems ideal, but in...
Comments : 0
Recommendations: 1
.jpg&w=3840&q=75)
When it comes to predicting the likelihood that birds will experience heat stress conditions on a given day, knowing outside relative humidity first thing in the morning is not particularly useful. Though air moisture levels have significant impact on bird comfort, relative humidity is constantly changing over the course of a day. In the morning relative humidity will tend to be between 80 and 100%. In the afternoon, as temperatures rise and the moistureholding ability of air increases, the...
Comments : 0
Recommendations: 0
The air speed in a tunnel-ventilated house is determined simply by dividing a house’s tunnel fan capacity by the cross-sectional area of the house: Air speed = Tunnel fan capacity (cubic feet per min) Cross-sectional area (square feet) To increase air speed, either tunnel fan capacity needs to be increased or the house’s cross-sectional area decreased. Air speed is...
Comments : 0
Recommendations: 0
Unlike many aspects of operating a tunnel-ventilated house during hot weather, the performance of an evaporative cooling pad system is relatively predictable. This is because there are well defined relationships between the cooling produced by a pad system and water usage, pad area, outside temperature/humidity, and water temperature. Since most evaporative cooling pads are essentially identical and the summertime conditions are fairly similar across most poultry growing areas of the U.S.,...
Comments : 0
Recommendations: 1
There are essentially two types of poultry house circulation fan systems: vertical and horizontal. In a vertical circulation fan system, fans are located in the center of the house, typically near the ceiling, and are oriented to blow straight down towards the floor. The air then moves across the floor, up the side walls, and back...
Comments : 0
Recommendations: 0
