Kenmore Elite 520
Score: 82/100
NuvoH2O Manor Duo
Score: 72/100Rankings
The Kenmore Elite 520 is a versatile 2-in-1 hybrid system that combines 31,000-grain softening with carbon filtration, offering NSF certification and self-cleaning capabilities. Its primary trade-off is a lower grain capacity compared to dedicated softeners and higher water usage per regeneration. It is best suited for households seeking a single unit for both softening and filtration without the hassle of filter replacements.
The NuvoH2O Manor Duo is a salt-free, whole-home water conditioning and filtration system that combines scale inhibition with contaminant removal for improved taste. It is best suited for homes with moderate hardness levels up to 25 GPG and limited space, though it does not provide the true softening effect of traditional ion-exchange systems.
| Attribute | | |
|---|---|---|
31,000 grainsbest | 25 grains | |
11.8 GPMbest | — | |
— | 5 personsbest | |
| ↓ lower better | 52 inches | 25.5 inchesbest |
| ↓ lower better | 21 inches | 16 inchesbest |
| ↓ lower better | 22.5 inches | 8 inchesbest |
1 yearsbest | — | |
20 PSI | 100 PSIbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Build & Durability(2) | ||
Tank Material | N/A | Plastic |
Warranty Length (years) | 1 years | N/A years |
Power & Compliance(2) | ||
Power Source | Corded Electric | None |
Certifications | NSF/ANSI 42, 44 | NSF/ANSI 42 |
Performance & Capacity(5) | ||
Grain Capacity (grains) | 31000 grains | 25 grains |
Service Flow Rate (GPM) | 11.8 GPM | N/A GPM |
Resin Volume (gallons) | Hybrid Media gallons | N/A gallons |
Recommended Household Size (persons) | N/A persons | 4-6 persons |
Operating Pressure (PSI) | 20-125 PSI | 100 PSI |
System & Control(4) | ||
Regeneration Control Type | Metered | None |
System Type | Hybrid | Point-of-Entry |
Salt Requirement | High Efficiency | None |
Display Type | Digital | None |
Physical & Installation(5) | ||
Height (inches) | 52 inches | 25.5 inches |
Width (inches) | 21 inches | 16 inches |
Depth (inches) | 22.5 inches | 8 inches |
Installation Type | DIY | Permanent |
Weight (lbs) | N/A lbs | 42 lbs |
Products in the top-left offer the best value (high score, low price).
Professional reviewers identify the Kenmore Elite 520 as a competitive hybrid option that effectively combines water softening with carbon filtration. The 31,000-grain capacity is highlighted as a valuable middle-ground feature, offering integrated contaminant reduction for chlorine and sediment without the bulk of larger 40,000-grain systems.
Users report significant improvements in daily living conditions, including softer skin and hair, cleaner laundry, and better-tasting water. Common praise focuses on the prevention of mineral stains and calcium buildup, as well as the financial benefit of reduced soap and detergent usage.
Professional reviewers position the NuvoH2O Manor Duo as a specialized salt-free conditioner rather than a traditional softener. Experts emphasize its strength in targeting scale buildup and basic taste issues while highlighting advantages like simpler installation and lower maintenance. However, they warn that it is less effective for very hard well water or water with significant iron content.
Everyday users frequently praise the system for its easy installation, low maintenance, and noticeable reduction in limescale on fixtures and appliances. Many appreciate the improved taste and odor of water, particularly with the chloramine filter options, and value the space-saving wall-mount design.
