Air Purifier Room Size Calculator

Find the CADR rating needed for your room.

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Air Changes Per Hour

Formula

CADR = Length x Width x Height x ACH / 60

What CADR rating do I need?

Choose a CADR at least two-thirds of the room area in sq ft.

How many air changes per hour are ideal?

Four to six air changes per hour is recommended for allergy relief.