97 Daikin Altherma 4 H operates silently down to 28 dBA sound pressure at 3 meters, making days and nights undisturbed. Sound pressure scale 20 dBA 30 dBA 40 dBA 60 dBA 50 dBA 100 dBA 140 dBA 28 dBA Daikin Altherma 4 H falling leaves whisper fridge rain talking trumpet fireworks The innovative louvered grill was especially designed to minimize sound power to the impressive level of 48 – 54 dBA, ensuring uninterrupted peace. J Contemporary sleek award winning design J Black louvered grill minimizes the visibility of the fan. It is made of >50% recycled plastics from industrial waste. J Integrates seamlessly with the surrounding environment by reflecting the surroundings on its cover and side panels The acoustic level can be evaluated in two ways J The sound power is generated by the unit itself, independently of distance and environment J The sound pressure is the sound perceived at a certain distance. The sound pressure is usually calculated at between 1 and 5 metres from the unit. Sound power* Sound pressure * Erp sound power: J class 04-06-07 - 48 dBA J class 06-08 – 45 dBA J class 10 – 47 dBA J class 12-14 – 52 dBA
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