Air handlers; air handling units; HVAC units for air conditioning; air filters for air-conditioning units; heat exchangers not being parts of machines; ventilation installations and apparatus; all of the foregoing for use in commercial, residential, and data center buildings; all of the foregoing for managing exhaust air and ambient air for improved energy efficiency and thermal performance

'air':1,3,9,11,15,49,52 'air-condit':14 'ambient':51 'apparatus':28 'build':41 'center':40 'commerci':36 'condit':10,16 'data':39 'effici':56 'energi':55 'exchang':19 'exhaust':48 'filter':12 'forego':32,45 'handl':4 'handler':2 'heat':18 'hvac':6 'improv':54 'instal':26 'machin':24 'manag':47 'part':22 'perform':59 'residenti':37 'thermal':58 'unit':5,7,17 'use':34 'ventil':25

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