noise had become important indicate to check range hood’ performance

　　Expect of the final exhaust air rate, famous export grease filter supplier said another important indicator, which can be used to check and judge the range hood performance is its biggest working noise, professional export grease filter supplier said the biggest work noise of range hood should never beyond 30 to 50 decibel in these abroad countries, but in our own country, because lots of range hood had adopts the multi-leaves centrifugal type wind rote, which can work with a very fast speed, so the bigger noise produced at the same time, but professional export grease filter supplier said the biggest work noise of range hood should never beyond seventy decibels in our own country.

　　According to national standard limits, professional export grease filter supplier said the biggest exhaust air efficiency of range hood should beyond sixty percent, which can be judge through the total carbon oxide contents in the inside kitchen environment, so users can through these two aspects to check if range hood has a better quality, which can find the right value on the instruction information book.