COMPARE SYSTEMS
Choose up to four systems and compare contaminant evidence, service flow, bundle bottlenecks, softening, maintenance, replacement costs, warranty coverage and 10-year ownership.
LIVE SIDE-BY-SIDE
Compare normalized flow, PFAS evidence, price, maintenance, warranty, origin and treatment type without mixing marketing definitions.
TRADEOFF SNAPSHOT
The comparison table is useful, but the decision usually comes down to a few major tradeoffs: evidence, flow, maintenance, warranty and real price.
SpringWell
20 GPM
~$3,600–$4,020
20 GPM service flow, long media life and very low maintenance.
PFAS evidence is weaker than a fully certified exact-system health-effect claim.
Open full review →Aquasana
5.7 GPM
~$2,600–$2,900
Strong PFAS/VOC evidence with a lower typical purchase price than SpringWell Max.
5.7 GPM certified/service flow and roughly 2-year main-media replacement.
Open full review →iSpring
Up to 15 GPM
~$750
Extremely low upfront price and nominal flow up to 15 GPM.
Cartridge replacement burden and evidence tier are weaker than full exact-system certification.
Open full review →Culligan
7.5 GPM
Dealer quote
Certified total-PFAS reduction with dealer support and monitoring.
7.5 GPM flow is moderate and dealer pricing is less transparent.
Open full review →SELECT SYSTEMS
SYSTEM 1
Certified PFAS/VOC-focused whole-house filtration.
SYSTEM 2
High-flow long-life whole-house carbon filtration.
SYSTEM 3
Dealer filtration plus certified PFAS cartridge stage.
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NORMALIZED COMPARISON
Metric
Aquasana HealthShield
SpringWell CF+ Max
HALO 5 + Defender
WaterScore
89
86
84
Service / certified flow
5.7 GPM
20 GPM
4.21 GPM per Defender
Peak / system flow
11.2 GPM
20 GPM
Parallel Defender design
PFAS evidence
Certified
Claim / evidence review
Certified Defender component
VOCs
Certified claim
Claimed / verify exact evidence
Configuration dependent
Chloramine
Tested claim
Catalytic-carbon claim
HALO 5 dependent
Hard-water treatment
None
Salt-free conditioning optional
Scale conditioning
True softening
No
Optional separate softener
No
Main replacement
~2 years / capacity
~10 years / capacity
Defender cartridges + media
Routine maintenance
Higher
Very low
Moderate
Warranty
2 years
Long-term limited
Component / dealer specific
10-year cost
Calculated
Calculated
Calculated
Made / assembled in
Exact HealthShield origin not clearly disclosed
United States
Varies by HALO component; verify exact configuration
COMPARISON RULES
A 20 GPM filter plus an 8 GPM UV unit is treated as an 8 GPM bundle for sizing purposes.
A manufacturer PFAS claim never displays as equivalent to an exact-system independent certification.
Scheduled filters, UV lamps, media, salt and expected service are part of the ownership view.
FilterTierEvidence-first whole-home water treatment comparisons built around your water, your house and your priorities.
FilterTier provides independent comparison and educational information, not medical, plumbing, engineering or legal advice. Product claims, certifications, specifications, prices, warranties and availability can change; verify current details with the manufacturer and use water testing and a qualified professional when appropriate. Some outbound links may be affiliate/referral links, which may earn FilterTier compensation without changing the price you pay or the scoring methodology.
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