Calculators and local planner

Understand and improve indoor air without guessing

Enter room dimensions to calculate a practical starting CADR. Your measurements remain in this browser.

🔒 No account or measurement upload

Quick CADR sizing

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Your result will appear here.

Size a device, calculate cost, log readings and track filters.

Calculate a target particle CADR from room volume and desired air changes per hour.

Check the effective ACH delivered by a device or calculate the airflow needed for a target ACH.

Estimate cooling capacity in kW and BTU/h from floor area, ceiling height, insulation, sun, occupants and equipment.

Estimate how much water is held in the room air above a target relative humidity.

Estimate the minimum water vapour required to raise relative humidity in the air volume.

Calculate daily, monthly and annual energy cost from power, runtime and tariff.

An air cleaner is supplemental. Moisture, combustion products, smoke, mould and leaks require source control and safe ventilation.

Every calculator explains its formula, units and limitations. Results are not hidden behind an account or an ad.