Why are Goodman AC units so loud? Goodman AC units are not necessarily louder than other brands when comparing same tier, but some entry level Goodman models like 14 SEER2 single stage have higher decibel levels around 74-78 dB compared to premium variable speed models at 55-65 dB. Loudness reasons include single stage compressor that runs full speed on/off causing startup noise, standard PSC fan motor instead of variable speed ECM motor that is quieter, thinner cabinet with less insulation than premium Trane or Lennox, and smaller condenser coil causing higher fan speed. Also improper installation can make any AC loud: undersized return duct causing high static pressure, loose panels, unit not level, or overcharged refrigerant causing compressor noise. Goodman high efficiency models like 18-20 SEER2 variable speed are much quieter, similar to competitors at 60 dB. Regular maintenance like tightening screws, cleaning coils, and adding compressor blanket reduces noise. So Goodman AC units may seem loud because many sold are entry level single stage builder grade models that are inherently louder, but premium Goodman variable speed models are quiet, and proper installation and maintenance reduce noise significantly.
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