Nearly ready for purchases. Just waiting on our new fan design and HEPA filters. Currently the unit will use a Senko fan. Senko DIY air purifier with hepa filter. LaserEgg next to it. Coming soon. As of July, 2018, we were not able to register a company to sell HEPA filters in Vietnam. To stay under the radar, it is best to order the HEPA filters directly from SmartAir and … [Read more...] about Coming soon: DIY Air Purifier in Vietnam