| Required Function | BACFREE Hi-Tech | Reverse Osmosis | Ultra Voilet Units | Granular Activated Carbon Filters | Carbon Block Filters | Powdered Activated Carbon Filters | Distillation Units | Jug Filters | ION Exchange Units | Sediment Filters | Ozone Filters | Iodinators and Brominators |
| Absolute Filtration to 0.2 microns | Yes | Yes | No | No | No | No | Yes | No | No | No | No | No |
| Removes Chlorine | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | No | No | No | No |
| Removes lead and other heavy metals | Yes | Yes | No | No | No | No | Yes | No | No | No | No | No |
| Removes Organic Chemicals | Yes | Yes | No | Yes | Yes | No | Yes | Yes | No | No | No | No |
| Removes Harmful Bacteria | Yes | Yes | Yes | No | No | No | Yes | No | No | No | Yes | Yes |
| Removes Protozoan Cysts | Yes | Yes | No | No | No | Yes | Yes | No | No | No | Yes | No |
| Removes Sub-micron Asbestos Fibres | Yes | Yes | No | No | No | No | Yes | No | No | No | No | No |
| Removes Foul Tastes and Odours | Yes | No | No | Yes | Yes | Yes | Yes | Yes | No | No | No | No |
| Leaves Essential Minerals Intact | Yes | No | Yes | Yes | Yes | Yes | No | Yes | No | Yes | Yes | Yes |
| Purifies on demand, no tank required | Yes | No | Yes | Yes | Yes | Yes | No | No | No | Yes | No | No |
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