Calculators

Air Changes per Hour Calculator (click to access)

Use this calculator to calculate the equivalent air changes per hour (ACH) that your room air purifier(s) provide in an indoor space.

You can also use it to calculate the ACH dokuki’s room air purifiers provide at various speed settings.

The Air Changes Calculator is recommended for homes and offices.

ASHRAE 241 Clean Air Delivery Rate Calculator (click to access)

Use this calculator to calculate the total Clean Air Delivery Rate (CADR) required for an indoor space by ASHRAE 241.

You will be able to tell how many room air purifier(s) you need, as well as their power, after getting the result.

The ASHRAE 241 Clean Air Delivery Rate Calculator is recommended for other types of occupancy other than homes and offices, such as restaurants, schools, and healthcare settings.