You want to buy a silent fridge. This way, you're not bothered by noise when you place it in an open kitchen. An extra silent fridge has a 31dB or lower noise level. With this, you barely hear anything. A silent fridge also makes little noise. It has a 32 to 34dB noise level. Keep in mind that the fridge makes more noise in the beginning, because it has to become cold first. You can find everything on silent and extra silent fridges here.