Home MaintenanceUpdated: November 2025

When did I last change furnace filter?

You should change furnace filter every 90 days. Forgetting to do this can lead to restricted airflow and higher costs. Track it once and never wonder again.

TaskFrequencyIf You Forget
Change Furnace Filterevery 90 daysrestricted airflow and higher costs

Why Tracking Matters

Tasks like change furnace filter are easy to forget because they're infrequent. A simple log turns a fuzzy memory into a clear record you can trust, helping you avoid restricted airflow and higher costs.

The recommended cadence is every 90 days. Track it each time you complete it and you'll always know exactly when you last did it—and when you should do it next.

3 Signs It's Time to Change Furnace Filter

  • Higher than expected bills
  • You can't remember when you last did it
  • It's been longer than every 90 days

Can't remember the last time you did this?

Log it now and never wonder again.

Want reminders and full history?

Track "Change Furnace Filter" in Loglast

Free • No credit card required

How to Track It

  1. 1Locate your furnace filter. If it's hard to find, snap a quick photo so you'll always know where it is.
  2. 2Create a tracker for Change Furnace Filter and log today's date. Add a short note if anything stood out.
  3. 3Set a Nudge reminder for every 90 days so you're prompted before it slips. (Pro feature)

Frequently Asked Questions

Why track "Change Furnace Filter"?

Tracking prevents forgetfulness and helps you avoid restricted airflow and higher costs. Set it once and keep peace of mind.

How often should I change furnace filter?

A good starting point is every 90 days. Adjust as needed and let Loglast remind you.

How do I know when was the last time I change furnace filter?

Without a log, it's easy to forget. Experts suggest every 90 days. Loglast records each time so you'll always know the exact date.

What's a good way to track how long since I change furnace filter?

You can use a notebook, but the easiest way is a simple logbook like Loglast—one tap to log and optional Nudges every every 90 days.

While You're At It...

Since you're thinking about change furnace filter, you might also want to track:

Stop wondering

"When did I last change furnace filter?"

Loglast is the calm, guilt-free logbook that remembers so you don't have to.

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