WHICH WAY DOES A FURNACE FILTER GO?

March 1, 2024

Slide the new filter in with the arrow pointing toward the furnace. Remember that air flows from your ducts, through the filter, and into the furnace. The arrow on the filter should always point toward the furnace. That’s the way a furnace filter goes!

Ever stood in front of your furnace, new filter in hand, and felt like you were trying to solve a Rubik’s Cube? You’re not alone. The seemingly simple task of inserting a furnace filter properly can be surprisingly perplexing. But fear not! This guide is here to clear the air (literally and figuratively) about which way your furnace filter should go, why it’s crucial to change it regularly, and how doing so can lead to a myriad of benefits for your home and health.

Step-by-Step: Inserting Your Furnace Filter Correctly

Locate Your Furnace Filter Slot: This is usually found in the air handler compartment, close to where the cold air enters your furnace.
Identify the Arrow: Every furnace filter has an arrow that indicates the direction of airflow. This arrow should always point towards the furnace (away from the return ducts where the air comes in).
Slide It In: With the arrow pointing in the correct direction, slide the filter into the slot. It should fit snugly, without any gaps around the edges.

Why Changing Your Furnace Filter is a Must

Efficiency: A clean filter allows air to flow freely, reducing the strain on your furnace and thereby increasing its efficiency and lifespan.
Energy Savings: A more efficient system requires less energy to heat or cool your home, leading to lower utility bills.
Health Reasons: Filters trap dust, pollen, and other airborne particles, improving indoor air quality and preventing these pollutants from circulating through your home.

The MERV Rating: What It Is and Why It Matters

MERV stands for Minimum Efficiency Reporting Value. It’s a rating system that measures a filter’s ability to capture larger particles between 0.3 and 10 microns. The MERV scale ranges from 1 to 16, with higher numbers indicating a filter’s ability to trap finer particles.

Choosing the Right MERV Rating for Your Home

MERV 1-4: These provide minimal filtration and are typically used in residential window air conditioners. They’re good for basic protection.
MERV 5-8: Ideal for standard home use, these filters capture most pollen, dust mites, and mold spores.
MERV 9-12: These are better suited for homes with pets, people with allergies, or in areas with high pollution. They can capture pet dander, auto emissions, and lead dust.
MERV 13-16: These high-efficiency filters are used in hospital and general surgery settings and can trap bacteria and tobacco smoke. They’re recommended for households with individuals having respiratory issues or autoimmune disorders.

NOTE: Vacu-Man recommends and sells the 1” filters Merv 8 & 10

Tips for Maintaining Your Furnace Filter

Check Monthly: A quick monthly check will help you determine if it’s time for a change.
Regular Changes: Change your filter at least every 90 days, or more frequently if you have pets, allergies, or a smoker in the home.
Right Size: Always use the correct size and type of filter recommended by your furnace manufacturer.
Store Extras: Keep an extra filter on hand so you can change it promptly when needed.

The Benefits of Regular Furnace Filter Changes

For Your Wallet: Regular changes keep your furnace running efficiently, reducing those dreaded energy bills.
For Your Comfort: A well-maintained furnace better regulates temperature, keeping your home cozy all year round.
For Your Health: Improved air quality can significantly reduce allergy symptoms and respiratory issues, making your home a safe haven from outdoor pollutants.
For the Planet: Energy-efficient homes contribute less to greenhouse gas emissions, making your furnace filter change a small but meaningful act for the environment.

The direction of your furnace filter may seem like a small detail, but it plays a significant role in your home’s air quality, energy efficiency, and overall comfort. Understanding the importance of the MERV rating and choosing the right filter can make a substantial difference in your living environment. So, the next time you’re about to replace your furnace filter, remember that this simple task is a step towards a healthier, happier, and more energy-efficient home. Keep the air flowing in the right direction, and you’ll be well on your way to reaping the benefits of a well-maintained furnace system.