A small change with big results. Read more
The deal includes BSI's 863 employees, engineering centre and manufacturing hub in Tennessee in the United States.
The data centres are, on average, 27 per cent more efficient than the market average.
McInerney said there was a lot of support for a national licensing scheme that includes natural refrigerants.
The DM284's advanced functions can be used to accurately diagnose equipment problems.
There was a record number of visitors to this year's show.
An estimated 1.6 billion air conditioning units will be installed by 2050, according to the Lawrence Berkeley National Laboratory report.