Water quality must be higher, with filtration needed. The higher the pressure and harder the water, the greater the filtration required. Pumps get larger as well, increasing operating costs. Supplemental cooling On a day with an average inside temperature of 90F, without supplemental cooling, pigs will reduce feed intake by 18 per cent. Using high air speed and sprinklers will provide as much as 25F of cooling and eliminate any reduction in intake.
Stirring fans are optional.
If necessary, they can be added at a later date. Air movement from the use of stirring fans and air inlets will quicken this process. But they didn't stir pig farmers. Aerators force oxygen into liquid manure storages, turning the manure into an aerobic mix and reducing the eye-watering odour. Producers found that aerators sucked more electricity than they were deemed to be worth, and opted to put up with odour complaints.