Water Silenced - Silensor's water-silenced motor uses a small water flow around the stainless steel, corrosion proof motor shell. This captures noise and vibrations, allowing the silensor's ultra quiet operation. Plus the silensor motor does not need a fan.... a big contributor to noise. The very low operating noise levels of Silensor makes it ideal for backyard operation close to neighbours, where quietness is very important. Plus you can take advantage of running during the night with lower off-peaks electricity rates.