Special Advertising Section replAce Old rOOFtOp uNits FAst! Special Advertising Section AAON HeAtiNg ANd cOOliNg prOducts A Thybar Retro-MateĀ® is custom made to adapt your existing roof curb to a new rooftop unit. It saves time and costly roof reconstruction, preserves roofing integrity, reduces system downtime, and takes advantage of existing ductwork. Our comprehensive library of new and old rooftop specifications lets us design a matching Retro-MateĀ® without extensive field measurements. Reduced engineering and construction time lets you bid more competitively. Licensed P on staff! .E. Direct inquiries to www.thybar.com. Thybar Corporation, 913 S. Kay Ave., Addison, IL 60101. 800/666-CURB. Fax: 630/543-5309. E-mail: info@thybar.com www.info.hotims.com/44629-49 reliAble cONtrOls superiOr rAdiAtOr cOils www.info.hotims.com/44629-51 66 www.info.hotims.com/44629-50 www.info.hotims.com/44629-52 ASHRAE Journal February 2013