poultry customers worldwide use tjp wall inlets to ventilate poultry houses with minimal expense. tjp wall inlets are gravity, counterweighted inlets that will open automatically with static pressurecaused by ventilation fans. some of our customers ask us about the number of fans and inlets they will need to properly ventilate their poultry houses. this short video will cover the basic informationyou will need to know.
this video will help you to calculate overallhouse size as well as how to determine how many fans and inlets you will need for minimum and transition ventilation. to get things started, let's calculate the size of your poultry house. we need to calculate the average ceiling height. to do this, we will take the wall height (8 feet tall) and add it to the height of the
ceiling at its peak (11 feet tall). then, we will divide by two. that gives us 9.5 feet as our average ceiling height. to get the cubic volume of the house, we multiply the house length (500 feet) by the house width (43 feet) by the house average ceiling height (9.5 feet). the cubic volume of the house, in this example is 204,250 cubic feet.
now that we have the cubic volume of the house, let's discuss how to calculate the number of fans and tjp inlets needed during minimum ventilation. first, we need to determine the number of fans needed at actual working pressure. first stage - fan volume that equals 1 air exchange every eight minutes during the first stage of minimum ventilation - to run on a cycle timer and temperature override.
to determine the number of fans needed, take the cubic volume of the house and divide by 8 (air exchange rate every eight minutes). then divide by how much air one fan can displace. a 36-inch fan can displace 10,200 cubic feet per minute. always round up or down to the nearest whole number. you need three fans for this house for the first stage in minimum ventilation the timer only has to run 20% of the time
as long as air quality is acceptable. for the maximum of minimum ventilation, you will need fan volume that equals 1 air exchange every 5 minutes. take the cubic volume of the house and divide by 5. then, divide by the amounts of air 1 minimum fan can displace in cubic feet per minute. 36 inch fan equals 10,200 cfm. to determine the number of inlets needed,
take the number of fans and multiply by the air displaced by one minumum fan in cubic feet per minute, then divide by inlet volume in cfm. allow 900 cfm per inlet. you need to spec inlets 25% higher. this is to prevent inlets from ever reaching100% of capacity. 45 inlets x 125% = 56 inlets for minimum ventilation, these will be lighterweighted inlets.
in this example, you need 4 fans and 56 inlets for this house for maximum of minimum ventilation. let's talk about using tjp inlets with transition ventilation. during transition ventilation, fan volume that equals 1 air exchange every three minutes. to determine number of fans needed, and divide by three. then divide by how much air one summer fan
will displace in cubic feet per minute and always round up or down to the nearest whole number. summer fan equals 21,500 cfm. to determine number of inlets needed, take the number of fans and multiply by the amount of air displaced by one summer fan in cfm then divide by inlet cfm,
allow 900 cfm per inlet. this is to prevent inlets from ever reaching100% of capacity 72 inlets x 125% = 90 inlets to determine the number of heavier inlets needed, take total number of inlets needed minus minimum ventilation inlets. 90 lighter weighted inlets - 56 minimum ventilation inlets = 34 inlets in this example, you need three summer fans,
56 lighter weighted inlets, and 34 heavier inlets for this house for transition ventilation. you have three choices of tjp inlets, the tjp1255 lighter weighted, the tjp1265 heavier weighted, and the tjp1275 heaviest weighted. the heavier the rod, the greater the static pressure (sp) needed to pull tjp inlets open.
in houses up to 43 feet or 13 meters wide, use a combination of tjp1255 lighter weighted and tjp1265 heavier weighted. in houses wider than 43 feet or 13 meters, use a combination of tjp1265 heavier weighted and tjp1275 heaviest weighted. placement when possible, always install inlets down18 inches or 46 centimeters from the top to the sidewall.
if minimum fans are on the sidewall, the lighter weighted inlets are on the opposite wall from fans. if there's not enough opening, place the remainder on the fan side. options for installing tjp inlets. tjp inlets are designed to give you the option of snapping two inlets together and installing a double inlet into one location.
if you install double inlets, you only need to install half the number of openings. for example, if you calculate that you need to install 34 inlets into a poultry house, you only need 17 openings. keep in mind that double inlets will needa larger opening during installation. features of the tjp inlets when minimum fans are on,
the lighter weighted inlets open to allow fresh air into the poultry house. when transition fans turn on, the lighter and heavier weighted inlets open when the house goes into tunnel ventilation, the static pressure will drop and the tjp wall inlets will close. light trap inlet options. double l group offers light trap inlet optionsthat will fit your needs.
let us help you find what you need for yourpoultry houses. we hope this video has given you some insight on the installation and use of tjp inlets from the double l group. we want to help you find what will work bestfor your needs. give us a call or email us with your questionsand we will be glad to help.
