1 70.4% of school staff have seen bullying. 2  62% witnessed bullying two or more times in the last month and 41% witness bullying once a week or more. 13. 3  When bystanders intervene, bullying stops within 10 seconds 57% of the time. 14. 4  Been Cyberbullied 6% of students in grades 6â12 experienced cyberbullying.
Adding central air conditioning to an existing forced-air heating system in a 2,000-square-foot house averages $3,500-$4,000, and can be done by two technicians in 2-3 days, with little or no change to the existing ducting; if ducts must be added, the work time doubles, as does the cost to $7,000-$8,000 or more, according to ThisOldHouse.com .
If installation and labor fees are included in the price, expect to pay anywhere from $2,650 to $15,600 for installation of a central air conditioning system as of 2013.pecifications. Perhaps the first step to determining the cost of replacing a central air conditioning unit is evaluating the specifications necessary for the size and dimensions of your home. Decide if your current unit adequately cools your entire home or if you require a larger unit.