Energy recovery ventilation apparatus, namely, energy efficient rotary wheel structures for use in air ventilators and units for exchange of indoor and outdoor air in residences and buildings; structural and components parts of the foregoing, namely, desiccant and enthalpy wheel matrices, frames, wheel constructions, seals, motors, drives and bearings

'air':14,24 'apparatus':4 'bear':49 'build':28 'compon':31 'construct':44 'desicc':37 'drive':47 'effici':7 'energi':1,6 'enthalpi':39 'exchang':19 'forego':35 'frame':42 'indoor':21 'matric':41 'motor':46 'name':5,36 'outdoor':23 'part':32 'recoveri':2 'resid':26 'rotari':8 'seal':45 'structur':10,29 'unit':17 'use':12 'ventil':3,15 'wheel':9,40,43

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