HARDI

For High Angular Resolution Diffusion Imaging see Diffusion MRI: HARDI and Q-Ball

HARDI, or Heating, Air-conditioning & Refrigeration Distributors International, is a not-for-profit association that promotes the business interests of wholesale air-conditioning, heating, and refrigeration companies. HARDI's member companies are estimated to represent about 80 percent of the industry's wholesale sales—more than $20 billion annually.