As the cool weather returns and furnaces start running again, now is the perfect time to change your furnace filter. It’s a As the weather cools and furnaces start running again, it’s the perfect time to change your furnace filter. It’s one of the simplest and most effective ways to protect your heating system and keep your home’s air clean.

When to Change It

A good rule of thumb is every three months, but sometimes more often if:

• You’re just starting or finishing the heating season
• You’ve been doing renovations or there’s been extra dust
• You have pets, allergies, or breathing sensitivities
• The system has been running more than usual

Reusable filters should be rinsed and dried monthly or as directed by the manufacturer.

Why It Matters

A clean filter lets air move freely through your furnace. When filters are clogged, they strain the blower motor, make the system less efficient, and can even cause it to overheat or shut down. You might also notice more dust in your home, uneven heating, or higher energy bills.

In short, a $20 filter can prevent a $500 repair.

Choosing the Right Filter

Filters are rated by something called MERV (Minimum Efficiency Reporting Value). Higher MERV ratings trap smaller particles, including fine dust and some allergens. But very high MERV filters can restrict airflow if your furnace isn’t designed for them. The system has to work harder, and that can shorten its life.

If you’re concerned about air quality but don’t want to overload your system, there are good alternatives to consider:

• Reusable electrostatic filters – These attract dust using a static charge and can be washed and reused. They work well for most homes if cleaned regularly.
• UV light systems – Installed inside the furnace or ducts, these can help reduce bacteria or mold on coils and in the air. They need professional installation and yearly bulb replacement.
• Electronic air cleaners – These use an electric charge to capture fine particles. They’re effective when clean, but need regular maintenance and can be more expensive.

Each has pros and cons, so it’s best to match the option to your home, budget, and comfort needs.

How Good Company Can Help

At Good Company, we handle all the small maintenance tasks that keep your home running safely and smoothly. We can:

• Replace or clean furnace filters as part of routine visits
• Check for dust buildup and basic furnace safety
• Remind you when service is due
• Recognize when it’s time to call in a qualified HVAC technician

Simple steps like these keep your home comfortable, your furnace efficient, and your air clean — all with less stress and fewer surprises down the road.