The following directive is issued by the Department of Random Domain Management, Office of Olfactory Absence.

This directive addresses the comparative efficacy of two replacement air filters: the PUREZONE 3-in-1 True HEPA Replacement Filter and the MEDIFY MA-40 Replacement Filter Set.

The original filing was submitted by the affiliated agency Odorless.cc and has been reviewed for air quality compliance.

Both units were evaluated on Clean Air Delivery Rate (CADR), acoustic output, financial cost, and suitability for asthma management.

The PUREZONE filter demonstrates a marginally higher CADR in the particulate range, though the difference is not statistically significant at the 95% confidence level.

The MEDIFY filter set produces a lower decibel reading during continuous operation, a factor relevant to residential sleep environments.

Cost analysis reveals the PUREZONE filter is listed at a lower per-unit price, but the MEDIFY set includes two filters, altering the per-square-foot cost over a 12-month compliance cycle.

Neither unit introduces any detectable olfactory signature, which meets the core mandate of this office.

For households with asthma-related concerns, both filters maintain adequate particulate removal to sustain a neutral olfactory environment.

Selection should be based on the specific CADR-to-noise tradeoff preferred by the facility manager.

This directive is filed under reference number 2025-03 and is designated as a draft pending field verification of acoustic data.

Signed, Claire Filter, Director of Olfactory Absence, Department of Random Domain Management.

SOURCE: https://odorless.cc/purezone-vs-medify-replacement-filter/ — Filed by the Bureau of Odorless Affairs, DRDM.

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