A. O. Smith AO-WH-FILTER
#1 in TankFull review
A certified, maintenance light tank for a small or medium home on chlorinated city water.
Amazon $399$399
The A. O. Smith AO-WH-FILTER is the better whole-house water filter overall, rated 3.6 to 3.3. The A. O. Smith AO-WH-FILTER leads on certification, price and running cost. The Aquasana Rhino WH-1000 wins on warranty. The A. O. Smith AO-WH-FILTER costs $600 less ($399 vs $999).
Aquasana Rhino WH-1000
#2 in TankFull review
For a household that wants to fit a filter and forget it for a decade on chlorinated city water.
Amazon $999$999
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the A. O. Smith AO-WH-FILTER for certification (certified to NSF/ANSI 42 vs tested to NSF/ANSI 42, not certified), price ($399 vs $999) and running cost ($0.67 per 1,000 gallons ($399 every 600,000 gallons) vs $0.95 per 1,000 gallons ($949 every 1,000,000 gallons)).
- Choose the Aquasana Rhino WH-1000 for warranty (10-year warranty vs 6-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every tank whole-house water filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | A. O. Smith AO-WH-FILTER | Aquasana Rhino WH-1000 |
|---|---|---|
| Overall rating | 3.6/5 | 3.3/5 |
| Running cost 25% | 56 $0.67 per 1,000 gallons ($399 every 600,000 gallons) | 43 $0.95 per 1,000 gallons ($949 every 1,000,000 gallons) |
| Certification 25% | 60 certified to NSF/ANSI 42 | 30 tested to NSF/ANSI 42, not certified |
| Flow 15% | 20 7 gpm service flow | 20 7 gpm service flow |
| Price 20% | 100 $399 | 76 $999 |
| Warranty 15% | 56 6-year warranty | 100 10-year warranty |
Specifications
| A. O. Smith AO-WH-FILTER | Aquasana Rhino WH-1000 | |
|---|---|---|
| Filtration | ||
| Capacity | 600,000 gallons | 1,000,000 gallons |
| Replacement filters or media | $399 | $949 |
| Running cost | $0.67 per 1,000 gal | $0.95 per 1,000 gal |
| Stages | 1 | 4 |
| Certified | NSF/ANSI 42 | - |
| Tested to (not certified) | - | NSF/ANSI 42 |
| Chloramine | No | No |
| PFAS | No | No |
| Build | ||
| Flow | 7 gpm | 7 gpm |
| Ports | 0.8 in | 1 in |
| Backwashing | No | No |
| UV stage | No | No |
| Warranty | 6 years | 10 years |