⏱️ Air Cleaning Time Calculator

How fast does your purifier clean the air? Enter room size and CADR to see cleaning time and air changes per hour.

Room & Purifier

Length (ft)

Width (ft)

Ceiling Height (ft) CADR (CFM)

Find CADR on the purifier box or spec sheet. Higher = faster cleaning.

12 min

to clean 1440 ft³ — 5.2 air changes/hr

180

Room ft²

180

Min CADR

Good ✓

Rating

💡 Allergies/asthma: aim 4+ ACH. Wildfire smoke: 6+ ACH. General use: 2+ ACH.