TERMS USED IN THIS GUIDE
CADR:
dB (A):
HEPA-13:
Pre-filter:
Activated carbon:
PM
/PM
/PM
1
2.5
10
EN
8
The "Clean Air Delivery Rate", or CADR, describes the air
purifier's effectiveness based on the volume of clean air
produced per minute.
Decibels are units that measure sound intensity. For
example, 25 dB is commonly described as quiet as a
"whisper" or "library quiet".
HEPA, or high-efficiency particulate air, is a standard
to designate the efficiency of an air filter for removing
particulates. HEPA-13 filters provide particulate filtration
removing 99.97% of particles over 0.3 microns in diameter.
These include pollen and other fine particulates.
A pre-filter removes larger particles before the air is
passed through the HEPA-13 filter. Renew has two pre-
filters: an audio-grade textile outer pre-filter and a mesh
inner pre-filter. Both can be cleaned and help to extend the
effective life of the HEPA-13 filter.
Sometimes referred to as charcoal filters, these filters
use activated carbon pellets that absorb and trap gasses
and odors from the air. Among many other things, this
filter helps to address the odors that can come from pets,
cooking, and smoking.
:
These are designations that describe airborne particulate
matter (PM) types in terms of their maximum diameter
as measured in microns (µ). All of these are inhalable, but
PM
particles are notable for being small enough to not
2.5
only enter the lungs but also the bloodstream. Long-term
exposure to air with high levels of PM
to several serious long-term health effects including heart
disease and lung disease.
The high-precision PM sensor in Renew measures the
concentration of particulates in the room's air and reports
PM
levels in the Airthings app in terms of microns per
2.5
cubic meter of air (µ/m
has been linked
2.5
).
3