This study is based on a family of four, each drinking two quarts of water per day. Replacement frequencies are based on the manufacturers suggested schedule.
| Make | Unit Cost | Filter Replacement Cost | Replacement Frequency | 5 Year Operating Cost |
|---|---|---|---|---|
| PureEarth CT | $89.40 | $35.40 | 3 Years | $124.80 |
| PureEarth CT-E | $53.40 | $23.40 | 3 Years | $76.80 |
| NSA 50C | $179.00 | $179.00 | 3 Years | $358.00 |
| Amway | $213.00 | $79.95 | 1 Year | $532.80 |
| Multipure | $329.95 | $34.95 | 6 Months | $644.50 |
| Brita | $35.00 | $7.00 | 2 Weeks | $938.00 |
| Innova | $6.99 | $5.99 | 2 Weeks | $796.00 |
| Pur | $49.00 | $9.98 | 3 Months | $238.62 |
| Typical R/O System | $599.00 | (1) | (2) | $1015.00 |
| Typical Distiller | $350.00 | (3) | (4) | $1172.00 |
| Bottled Water | $0.79 | - | - | $2,960.00 |
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