Air handlers; residential gas furnaces; central air conditioners; single-zone and multi-zone mini-split heating and air conditioning apparatus; indoor air ventilation systems, namely, heat recovery ventilators and energy recovery ventilators; tankless water heaters; hot water tanks; fireplaces

'air':1,7,21,25 'apparatus':23 'central':6 'condit':22 'condition':8 'energi':33 'fireplac':42 'furnac':5 'gas':4 'handler':2 'heat':19,29 'heater':38 'hot':39 'indoor':24 'mini':17 'mini-split':16 'multi':14 'multi-zon':13 'name':28 'recoveri':30,34 'residenti':3 'singl':10 'single-zon':9 'split':18 'system':27 'tank':41 'tankless':36 'ventil':26,31,35 'water':37,40 'zone':11,15

REDZONE

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