Replace your HVAC filter only once you need to.
The smart filter monitor works with the filter you already have — any brand, any size. It shows you in real time exactly how dirty your filter is, and ships a fresh one only when replacing saves you money. No guessing, no reminders, no wasted filters.
“How often should I really change my filter?” Even the experts answer “it depends” — see this utility-company explainer. Your monitor replaces “it depends” with a measurement.
Your filter is already fine. Now make it smart.
No special filters required — the monitor works with whatever filter your system uses today. Save money, breathe cleaner air, and never think about filter schedules again.
It measures, not guesses
The monitor reads the pressure drop across your filter all day, every day — the honest signal of how much air your filter is actually blocking.
It knows the real cost
A clogging filter makes your HVAC work harder than it needs to. The monitor turns that into dollars — and acts only when a new filter is genuinely cheaper.
The right filter shows up
You get an email before any order, with one-click cancel. Otherwise the correct filter simply arrives before the old one starts costing you money.
Up and running in minutes
No apps to install, no wiring, no technician. The monitor arrives assembled and walks you through setup from your phone.
Install the monitor
Drill one small hole on each side of your filter, slip in the kit's two flexible tubes, connect them to the monitor, and plug in the power adapter.
Connect it to your WiFi
The monitor creates its own temporary WiFi network. Join it from your phone, pick your home WiFi, then scan the QR label to link it to your account.
Let it do the math
It tracks your filter around the clock. When replacing would save you money, you get an email — and the new filter ships itself.
Your data is free. The magic is in the filters.
Every monitor comes with live data, no strings attached. Enroll in Filter AutoShip — your replacement filters, delivered automatically — and the full intelligence turns on. No monthly fee, ever.
With every monitor
Included free, forever
- Live pressure & temperature on your dashboard
- Works with your smart home — Home Assistant today; Google Home, Alexa & SmartThings coming
- Device status at a glance
With automatic filter delivery
Just buy your filters through us — no subscription fee
- Everything in the free tier
- Energy-savings calculation — what your filter costs you, in real dollars
- Historical trending — pressure, runtime, and cost over weeks and seasons
- Filters ship themselves — with an email and one-click cancel first
- Advanced HVAC diagnostics (coming soon)
Be first in line
We're hand-building the first batch now. Join the launch list and you'll get one email the moment monitors are available — launch-list members get first dibs.