working principle
The fresh air purifier is used to connect the outdoor air to the outdoor air, through the primary filtration, activated carbon filtration, HEPA filtration, negative oxygen ion treatment, photocatalytic treatment, and then deliver oxygen-enriched fresh air to the room to form a positive air pressure in the room. The harmful substances such as formaldehyde, benzene, ammonia and TVOC are diluted and eliminated, and PM2.5, PM10, dust and fibers are filtered out.
Shopping tips1. Whether the function meets the demand (purification + fresh air), can clean PM2.5, dust, bacteria and other micro-particles, can supply sufficient negative oxygen ion fresh air indoors (national standard and WHO health standard: per capita fresh air volume per hour) ≥30 cubic meters / hour), and has a positive pressure fresh air that emits gaseous pollutants such as formaldehyde, benzene, ammonia, TVOC, etc. outside.
2. The cost of use, the power consumption is not high; the cost of product use and maintenance, the cost of filters such as activated carbon and HEPA should be considered.
3. Whether there is secondary pollution, many products use electrostatic dust removal, which will produce a lot of ozone, which is harmful to health.
4. Can isolate noise and the noise level of product operation. Buy a fresh air heater to provide quality of life, and don't let noise affect our quality of life.
5. Is there a pipe, or a machine with a pipe. Easy to install!
musical key finder (Whistle Key Finder)
Ningbo AST Industry Co.,Ltd has 17 Years Experiences to produce the Voice Keychain, Key Finder, Whistle Key Finder, key fob and so on.we can assure you of competive price,high quality,prompt delivery and technology supporting.
1. Voice Keychain Application:
If you lost your key,how do you find it? Our key finder can solve this issue simply.Simply whistle and this key fob will flash and beep to help you find the lost keys.
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2. Sound Quality:Clearly and Loudly
3. Can be printed your logo on it
4. Certification:CE ,Rohs
5. Export to:
Whistle Key Finder, Musical Key Finder, Electronic Key Finder
AST Industry Co.,LTD , https://www.astsoundchip.com