Shares in heating, ventilation, and air conditioning (HVAC) company AAON (NASDAQ: AAON) were up by 16.6% in the week to Thursday afternoon. The more significant part of the move comes down to its third-quarter earnings released at the start of the week. 

AAON's earnings per share (EPS) of $0.51 came in ahead of the market consensus of $0.42 as the company continued the theme of a robust reporting season for HVAC companies. 

Furthermore, there's every indication that the market that AAON plays in, namely commercial HVAC, is strengthening even as the residential HVAC market is cooling. 

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Source Fool.com