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 unit's tonnage and SEER rating. In a 2,000 square foot home with existing ductwork, central air conditioning costs $3,000 to $5,000 installed. If ductwork is additionally required, costs could reach $6,000 to $10,000 or more. Mini-split central air conditioner prices average $1,500 to $3,000 installed. Note that while a high efficiency unit could cost up to 30 to 40 percent more than one with the minimum 13 SEER rating, the extra costs should be recouped in energy savings over the lifetime of the system.