Does the fresh air system have activated carbon and hepa screens?
Conventional fresh air system, just a simple first effect of the filter, filter can not pm2.5, of course, is not absolute, such as Honeywell early there is a MV250 new wind system host, the host configuration hepa filter can filter less than pm2.5 Of 0.3 micron particles.
To know that the fresh air system filter is mainly filtered, isolated from the dust, particles, contaminants, and then the fresh air into the room, once the use of a long time, the filter will be filled with dust, bacteria, viruses, if Not timely clean up the filter, it will cause a serious fan when the fan will increase the current, easy to use the long time to make the motor burned, the filter plugged as the hands of the fan to keep the same motor load, The wind fan electric fan will burn, and may make it into the indoor air secondary pollution source, so the need for frequent fresh air system filter replacement. Afraid to forget how to do, under normal circumstances can be based on local air pollution conditions set their own filter replacement time.
Now there are many fresh air system on the market only the primary filter and filter in the efficiency, that is, activated carbon and hepa filter are not.
The initial effect of the filter and the role of the filter and activated carbon is almost the same, activated carbon filter can be dispensable (of course, better, not also affected little)
HEPA filter function, is the initial effect and efficiency or activated carbon can not be replaced, so the purchase of fresh air system must pay attention to buy HEPA filter
