CleanRoom

About this app

What CleanRoom does

When wildfire smoke turns the sky orange, one well-filtered room can be the difference between a rough night and a dangerous one. CleanRoom helps you build that room, prove it actually clears the air, and know exactly when to swap the filter before the next haze arrives. Most air-purifier advice stops at "buy one for the bedroom." CleanRoom goes further. Punch in a room's square footage and ceiling height, and it calculates the Clean Air Delivery Rate (CADR) and air changes per hour (ACH) you actually need. It uses the EPA's wildfire-smoke guidance: target a smoke CADR equal to your room's square footage, and aim for four to five air changes per hour to keep PM2.5 down during an active smoke event. Add the purifiers and DIY box-fan-plus-MERV-13 filters you own, and CleanRoom tells you on the spot whether your setup is undersized, just right, or has room to spare. Filters do not wear out on a calendar. They wear out on exposure. CleanRoom tracks each filter's life against the smoke days it actually breathes through, accelerating the countdown when the air outside is bad and pausing it when skies are clear. Log an AQI for the day and your filter timeline adjusts, so you replace media when it is genuinely spent instead of guessing or wasting money on early swaps. When an event hits, the built-in smoke-event playbook walks you through the moves that matter: seal the room, recirculate the HVAC on a MERV-13 filter, run the purifier on high, and keep the door closed. Everything is offline and on-device. No login, no subscription wall in front of the calculator, no servers to fail when the power flickers and you need answers fast. Save as many rooms as you need. A nursery has different stakes than a home office, and a one-bedroom rental needs a different plan than a four-bedroom house. Build a profile for each space, keep a separate filter timeline for every device, and check any room at a glance when the AQI spikes. You can even export a room-readiness summary to share with a landlord, a co-parent, or family members who are coordinating with you across town. Whether you are a parent with an asthmatic kid, a renter without central air, or a homeowner hardening a single safe room, CleanRoom turns confusing CFM numbers into a clear plan you can trust. There is nothing to subscribe to before you can run the math, and nothing leaves your phone. • CADR + ACH calculator sized to your exact room, EPA wildfire-smoke targets built in • Add real purifiers and DIY box-fan filters; instant pass or undersized verdict • Exposure-accelerated filter life that counts smoke days, not calendar days • Daily AQI log that adjusts every filter's remaining life automatically • Step-by-step smoke-event playbook to seal and clear a room • Save multiple rooms: bedroom, nursery, office, the whole home • Fully offline, no account, no tracking, no subscription to use the core tools CleanRoom is a planning and preparedness tool, not a medical device or a substitute for official air-quality alerts. Always follow guidance from local authorities during a wildfire event.