Blue Sky Filter is a professional air filter supplier and car air filter manufacturer in China since 2009.


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For now,a lot of people don't konw what HVAC stands for.The Truth is Heating,Ventilation and Air Conditioning.

We clean our room frequently,Why would we need this HVAC system,What kind of pollution do we have indoors?Which leads us to our next question:

What in indoor pollution?

Indoor Pollution Sources Include:

~Smoke Pollution in the Kitchen

~The Smell of New Furniture

~Smoking in home

~All Kinds of Air Freshening Products

Normally,if we want to solve this air pollution,we should get the contaminated air out of house and bring fresh air into house,that's what the letter "V" stands for---Ventilation.While outdoor air also contains pollution,we should use the filtration system to filter the air.However,the filter system works only if we change the filter regularly.

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