Even though the recession was technically over several years ago, and some economic indicators point to a modest recovery, HVAC contractors remain cautious, as evidenced by the Air Conditioning Contractors of America (ACCA)'s December Contractor Comfort Index (CCI), which measured 53. Weighted and averaged into one number, a CCI of 50 or above reflects anticipated growth. The number for December 2011 was lower than 12 months earlier, when the CCI was 61.