Compressor speed refers to the frequency at which the heart of your Heat Pump System is running. Thanks to Inverter Technology, our compressors can slow down or speed up to match the cooling demand perfectly. This is much more efficient than old-fashioned units that only have one speed (on or off). You can see the energy savings in our SEER2 Ratings for the Sophia Series. A slower speed also means a lower Decibel Rating (dB), making our units whisper-quiet. The Inverter Control Board handles all these adjustments automatically. It’s the secret behind the consistent comfort of our Ductless Mini Splits. Understanding variable speed helps you appreciate the advanced engineering in your home.