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 .
Central Air Average Costs. The actual cost of central air installation depends on a number of factors, including the size of the home as well as the unitâs tonnage and SEER rating. 1  In a 2,000 square foot home with existing ductwork, central air conditioning costs $3,000 to $5,000 installed. In a 2,000 square foot home with existing ductwork, central air conditioning costs $3,000 to $5,000 installed. 2  If ductwork is additionally required, costs could reach $6,000 to $10,000 or more. 3  Mini-split central air conditioner prices average $1,500 to $3,000 installed.