The Blast FFU Air Purifier is a powerful FFU (fan-filter-unit). Simple and low-cost, yet effective. The Blast FFU uses a huge fan to send high volumes of air through a large HEPA filter, giving clean air for spaces up to 130sqm.
Blast HEPA Filter
Replacement HEPA filter for the Blast purifier
Purifier companies can make obscene profits when most people don’t understand how purifiers work. Here’s the honest truth: a purifier is fan + a filter. In this case, that fan and filter are just huge—20 times the size of our Original DIY HEPAs.
We tested over 10 different HEPA materials before deciding on using an H13, 99.95% HEPA filter. That means it can capture 99.95% of those particles above (and below) 0.3 microns!
How often should I change the HEPA?
We tested a HEPA in real Beijing air for 200 days to get a sense of how long HEPAs last in real Beijing air. Based on that data, Paddy estimated the HEPA lifespan for the Blasts. These estimates for the Blasts are for 8 hours of use every day. If you use it more or less, you can calculate lifespan using the total number of hours below.
Time to change the HEPA?
You’ll only need to change it every 7-20 months, but we still tried to keep things simple.
Can I wash a dirty HEPA filter?
Unfortunately not. We ran experiments to test this and found that washing HEPA filters does not prolong their lifespan.
Blast Carbon Filter
Weight of carbon: 1.3 kg
Filter Material: Granular activated carbon
Dimensions (LxWxH): 540 x 10 x 1140 mm
Flexible design: The modular D30 system enables you to arrange the solar LED lights to best suit your home or business. With the flip of a switch, you can light up your home for up to 17 hours on a single charge.
Exciting Accessories: The D30 bundle comes packed with a solar FM radio with MP3 playback providing up to 8 hours of runtime and a bright torch lasting up to 3 hours on a single charge.
PayGo technology: The D30 allows you to own a powerful solar home system without burning a hole in your pocket; now pay in easy installments from the convenience of your home.