Energy recovery ventilators for recovering and refreshing air and parts therefor, namely, enthalpy rotors, sensible rotors, energy recovery heaters, also known as heat wheels, rotors, and cassettes; equipment for fresh air treatment, namely, air purifiers, air cleaning units and industrial and commercial air filter machines, which also function to recover energy and maintain indoor air quality; air handling and treated fresh air units, namely, air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter

'air':8,31,34,36,43,55,57,62,65,70 'also':20,47 'cassett':27 'clean':37,66 'commerci':42 'contain':68 'energi':1,17,51 'enthalpi':13 'equip':28 'filter':44,71,77 'fresh':30,61 'function':48 'handl':58 'heat':23 'heater':19 'indoor':54 'industri':40 'known':21 'light':73 'machin':45 'maintain':53 'name':12,33,64 'part':10 'photocatalyt':76 'purifi':35 'qualiti':56 'recov':5,50 'recoveri':2,18 'refresh':7 'rotor':14,16,25 'sensibl':15 'therefor':11 'treat':60 'treatment':32 'ultraviolet':72 'unit':38,63,67 'ventil':3 'wheel':24

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