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 .
For example, homes with forced hot air heating will have the duct work necessary for a fast and easy installation, when the project involves the running of ducts however the prices climb significantly. The average price to install a central air conditioner will range from $2650 to upwards of $15K.This installation cannot be considered a DIY project, and it is traditional for a homeowner to hire a contractor for the job.dditional considerations and costs. Total costs for a central air conditioning system will depend upon the size of the home, the number of windows, the quality of the insulation, and the tonnage and SEER rating of the unit selected for installation as well.