HEPA describes filtration performance
It refers to high-efficiency particle filtration, not the size of room a purifier can handle.
CADR is a delivery measure
Clean Air Delivery Rate is used by many products to indicate particle-removal airflow.
Noise matters at useful speed
A purifier that is always turned down because it is too loud may deliver less air cleaning.
Avoid ozone-producing claims
Health Canada cautions against devices that intentionally produce ozone for occupied homes.
General consumer information only. Do not mix cleaning chemicals or improvise electrical, chimney, high-access, pressurized, drain or other safety-critical work. Follow Canadian product labels, recall notices and the exact manufacturer’s instructions.