HVAC Filter Reminder

Never forget to change your filter again.

A tiny light that magnets or sticks on and watches the calendar for you. Green means good, yellow means soon, red means now. No app. No Wi-Fi. No thinking about it.

Coming Soon filterlight.net

How It Works

One light. Three signals.

Magnet or stick it on, then forget it. FilterLight counts the days and tells you exactly when to act.

Red: Change Now

Time is up. Swap in a fresh filter to keep your air clean and your system running easy.

Yellow: Change Soon

You are getting close. Grab a replacement filter so you have it ready in the coming days.

Green: Good to Go

Everything is working great. Your filter is doing its job and your air is flowing clean.

Why FilterLight

Small device. Big reminder.

Built to be the easiest home upgrade you will ever install.

3-Year Battery

Long lasting power that keeps working season after season. Set it and forget it.

Magnet or Stick-On

Attaches with a built-in magnet or adhesive backing. No tools, no drilling, no fuss.

Any HVAC Brand

Works with every standard heating and cooling system. If it has a filter, it fits.

Fits 1" to 4" Filters

Sized for all standard residential and light commercial filter thicknesses.

Bright, Easy to See

Clear signal lights you can read at a glance from across the room.

Home or Business

Perfect for houses, offices, rentals, and anywhere clean air matters.