Poultry House Control
44
Ventilation Levels
In precision mode the Platinum Plus provides up to 30 programmable ventilation
levels. The usual way to program them is to start the first level with the least amount of air to
be used.
In the relay layout example above, we programmed 4 exhaust fans and 9 tunnel fans.
As a rule of thumb, we consider the exhaust fans to move 10,000 cfm (cubic feet per minute),
and the tunnel fans to move 20,000 cfm. Various producers use either exhaust or tunnel fans
for minimum ventilation. In this example, we show the exhaust fans being used exclusively
for minimum ventilation.
Example Ventilation Table
Exhaust Fans Tunnel Fans
Lev
Diff
On
Off
1 2 3 4 1 2 3 4 5 6 7 8 9
1 30 270
● ●
2 40 260
● ●
3 52 248
● ●
4 70 230
● ●
5 90 210
● ●
6 120 180
● ●
7 160 140
● ●
8 225 75
● ●
9 300
◙ ◙
10 100 200
◙ ◙ ● ●
Key, continuous: ◙ Key, cycle: ● Key, rotate: ○
Commonly a producer will choose two of the exhaust fans and run them on timer for
several levels as indicated here. At level 9 the fans run full time, and at level 10 the 2
nd
two
fans run on timer while the first two run continuously. Some growers will use tunnel fans for
minimum ventilation. A
grower without any
exhaust fans might set up
the minimum ventilation
area like this:
Note that all 9
tunnel fans are operating
in rotation, so that the
minimum ventilation
does not depend on any
one fan. At level 10 fan 1
runs continuously, while
the other 8 fans take turns
on timer. At level 9 the
Platinum Plus simply
changes fans every 5 minutes.
These tables are for example only, to illustrate methods of programming the precision
ventilation table. The main points are:
Example Ventilation Table
Tunnel Fans
Lev
Diff
On
Off
1 2 3 4 5 6 7 8 9
1 30 270
○ ○ ○ ○ ○ ○ ○ ○ ○
2 40 260
○ ○ ○ ○ ○ ○ ○ ○ ○
3 52 248
○ ○ ○ ○ ○ ○ ○ ○ ○
4 70 230
○ ○ ○ ○ ○ ○ ○ ○ ○
5 90 210
○ ○ ○ ○ ○ ○ ○ ○ ○
6 120 180
○ ○ ○ ○ ○ ○ ○ ○ ○
7 160 140
○ ○ ○ ○ ○ ○ ○ ○ ○
8 225 75
○ ○ ○ ○ ○ ○ ○ ○ ○
9 300
○ ○ ○ ○ ○ ○ ○ ○ ○
10 100 200
◙ ○ ○ ○ ○ ○ ○ ○ ○
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