"Any company that can consistently create revenue out of air is worth a look," says Jim Stack, referring to Air Products & Chemicals (NYSE: APD).
In his InvesTech Market Analyst, the advisor and money manager explains, "We especially like a company that can create over $10 billion a year in sales ... from air (actually industrial gases)." Here, he explains the reasons he rates the shares a 'buy' in his model portfolio.
"For APD, much of that 'air' revenue comes from the sale of tonnage gases. Tonnage gas delivery involves the on-site or pipeline delivery of hydrogen and other chemicals to oil refineries.
"Being a great company is just half of the equation; buying a great company at a great price is the key to successful investing," says 
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