 Watsco Inc. WSO, -1.15 said Friday it will raise its quarterly dividend by 13, to boost the heating, air conditioning and refrigeration HVACR distributors dividend yield to more than double that of the SP 500. The company said the new dividend of 2.20 a share, up from 1.95 a share, will be payable April 29 to shareholders of record on April 14. 