Our verdict
Pick the Aquasure Harmony 40,000 if you prefer Aquasure's support and parts and its stated figures suit your water. Pick the Aquasana WH-SF40 if you prefer Aquasana's support and parts and its stated figures suit your water.
The central trade-off
Service flow. The Aquasana WH-SF40 lists 15.5 GPM; the other listing doesn't state one.
Warranty. The Aquasana WH-SF40 lists 5/10-Year Limited Warranty; the other listing doesn't state one.
At an efficient salt setting. About 30,000 grains for the Aquasure Harmony 40,000 and 30,000 for the Aquasana WH-SF40 between regenerations (three quarters of each rating). Check both against your water.
Side by side
| Specification | Aquasure Harmony Series AS-HS40SCZ 40,000-Grain Water Softener | Aquasana WH-SF40-BASE 40,000-Grain Water Softener |
|---|---|---|
| Type | Not stated by the maker | Not stated by the maker |
| Grain rating | 40,000 grains | 40,000 grains |
| Service flow | Not stated by the maker | 15.5 GPM |
| Control valve | Not stated by the maker | Not stated by the maker |
| Resin | Not stated by the maker | Not stated by the maker |
| Dimensions | 9"L x 9"W x 55"H | 30"L x 16"W x 43"H |
| Shipping weight | Not stated by the maker | 92 lb |
| Warranty | Not stated by the maker | 5/10-Year Limited Warranty |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.
Which should you choose?
Choose the Aquasure Harmony Series AS-HS40SCZ 40,000-Grain Water Softener if
- You prefer Aquasure's support and parts
- Its stated figures suit your water
Choose the Aquasana WH-SF40-BASE 40,000-Grain Water Softener if
- You prefer Aquasana's support and parts
- Its stated figures suit your water