Right now, there's a filter sitting in your HVAC return vent that you probably haven't thought about in months. Maybe longer.
It's gray. It's packed with dust. And it's quietly draining your bank account.
Here's What Happens When a Filter Clogs
Your HVAC system needs to pull air through that filter to heat or cool your house. When the filter gets packed with debris, the system has to work harder to pull the same volume of air. Much harder.
The blower motor spins faster. The run time gets longer. The electricity meter keeps climbing.
According to the U.S. Department of Energy, a clogged filter can increase your HVAC system's energy consumption by up to 15%. On a system that costs $200/month to run during peak summer or winter, that's an extra $30/month — or $360 per year — burned on electricity you didn't need to use.
The Bigger Risk
Wasted electricity is the minor consequence.
The major one? Motor burnout.
When a blower motor operates under sustained vacuum pressure from a restricted filter, it overheats. The bearings wear out faster. The motor eventually fails.
Average cost to replace a residential HVAC blower motor:
- Parts: $150 – $450
- Labor: $300 – $700
- Total: $450 – $1,200
All because of a filter that costs about $20 to replace.
The 90-Day Window
For a standard 1-inch pleated filter, the maximum effective lifespan is 90 days. If you have pets, run the system heavily, or live in a high-dust area, that shrinks to 45–60 days.
After that window, the filter transitions from protecting your system to actively damaging it.
The Fix Is Automation
Nobody actually remembers to check their air filter every 90 days. We all think we will. We don't.
That's the entire reason Ironside exists.
You tell us your filter size once. You pick MERV 8, 11, or 13. We ship a fresh filter to your door on a schedule that matches your replacement cycle.
When the box shows up on your porch, that's your reminder. Swap the old one. Drop in the new one. Walk away.
Your HVAC runs efficiently. Your electricity bill stays predictable. Your $1,200 motor stays intact.