Ventilation Rates for poultry

Good article at right time. I request the authers that they shall further guide about the minimum ventilation rates where the humidity in shed/house is less than 50% .
Regards,
Dr. Mqsood Haider Jaffery

When the relative humidity is below 50% minimum ventilation rates can often be decreased. The amount to which they can be decreased depends on house carbon dioxide concentrations. In general carbon dioxide levels should typically be kept below 5000 ppm ideal 3500. Though there are some charts that provide an approximation of how much you need to ventilate to control co2 

Read Minimum Ventilation Rates

The best way is to measure both Rh and CO2 and adjust minimum ventilation rates accordingly.

Mike Czarick

Very informative. In winter when there is fogg RH out side the house is above 85% what should be the minimum ventilation rate in this condition. This condition we are facing now a days. Out side temperature is 0 oF

When it is very humid and cold outside ventilation rates may need to be increased 20% to remove sufficient moisture. It is important to keep in mind that it is still more moist inside the house than outside and that ventilation, if done properly, will remove moisture from the house.

Newsletters that address this subject:

Read: Condensation Cloud

http://www.poultryventilation.com/sites/default/files/tips/1990/vol2n15.pdf

Mike Czarick

very good article about Simple Chart to Help Determine Minimum Ventilation Rates for poultry!!!!

It is really informative article about Ventilation Rates for poultry, positively helpful for farmers and technical persons who are involved in this field.

a very informative article. basically pls guide on the issue of foot pad dermatitis and litter moisture taking into account the ventilation rates in broiler house.
secondly on the migration of birds in tunnel ventillation during cold weather.

pls also suggest a thumb rule on fan usage .

We have written a couple of newsletters on the subject of foot pad dermatitis that I think will answer your questions:

Read: Minimizing Foot Pad Dermatitis & Maintaining Dood Paw Quality

The Relationship between Litter Moisture and Foot Pad Dermatitis

Bird migration is typically a response to air movement in a tunnel house. The birds will tend to walk in to the directio of air movement over time. The key to managing migration of any type is the installation of migration fences.

Read: Migration Fences Should be used during cold weather

Mike Czarick

The primary time a producer needs to be concerned about a very low humidity is during brooding. A very low humidity can lead to chilled chicks and dehydration. It is important that the house humidity is raised to acceptable levels before the chicks arrive. This typically involved spraying the walls and ceiling with water prior to preheating. It is equally important that the house is not overventiled due to excessive fan run times or because the house house is very loose and the wind over ventilates the house.

Mike Czarick

When using diesel heaters connected to a duct I like to put a number of fogging nozzles very close to the heater outlet. The air is the hottest in this location and the water tends to evaporate quickly.

but i know there are many controllers in the market which have this feature to increase ventilation level after a preset level of humidity is in excess

Thank you for a very informative Article about Ventilation Rates for poultry, it is realy clearify all the informations and especialy the Chart gives more detail for it .
for the Diseal heaters it will be more good that some need to install them in the service roomof the house and if Plastic tube is used for Heating the internal house it is a good Practice too , and for the Humidity in this case installing a few Fogers in the house will be more good to run time automatically or manually operated as it will save the Laboring etc too .
Thank and Regards

Dr wisal Khan