Maintaining high indoor air quality is essential for a healthy home environment. One of the most effective ways to achieve this is by using a high-quality HVAC filter. Filtrete filters are a popular choice for homeowners because they offer a variety of options designed to capture everything from large dust particles to microscopic allergens and viruses.
In this guide, you will learn how to identify the correct size for your system, understand the unique rating system used by this brand, and determine which level of filtration best suits your household needs. By following these straightforward steps, you can ensure your heating and cooling system runs efficiently while keeping your air clean.
Understand the MPR Rating System
When shopping for these filters, the first thing you will notice is the Microparticle Performance Rating (MPR). While many brands use the MERV (Minimum Efficiency Reporting Value) scale, this specific brand uses its own proprietary MPR system.
MPR measures a filter’s ability to capture particles between 0.3 and 1 micron in size. These tiny particles often include bacteria, smoke, and viruses. Understanding this scale is the key to choosing the right level of protection for your family.
Basic Dust and Lint (MPR 300 – 600)
Filters in this range are designed for basic protection. They primarily capture large particles like lint, household dust, and dust mite debris. These are ideal for households without pets or allergies that simply want to keep their HVAC equipment clean.
Allergen Defense (MPR 1000 – 1200)
This mid-tier range is a significant step up. These filters are electrostatically charged to attract and capture smaller particles. They are effective against pollen, pet dander, and mold spores. If you have mild seasonal allergies, this is often the best starting point.
Healthy Living (MPR 1500 – 2800)
The highest ratings are designed for maximum air purification. These filters can capture microscopic particles, including bacteria, viruses, and smoke particles. They are highly recommended for homes with individuals who have asthma or compromised immune systems.
How to Find Your Filter Size
Before purchasing a replacement, you must know the exact dimensions required by your HVAC system. Using the wrong size can lead to air bypassing the filter or restricted airflow, which may damage your furnace or air conditioner.
Check the Existing Filter
The easiest way to find your size is to look at the filter currently installed in your system. The dimensions (Length x Width x Thickness) are usually printed on the side of the frame. Common sizes include 16x20x1, 20x20x1, and 20x25x1.
Measure the Intake Vent
If the label is missing or illegible, you can measure the filter slot or the intake vent yourself. Use a measuring tape to find the length and width of the opening. Remember that the nominal size (the size printed on the box) is usually slightly larger than the actual size of the filter to ensure a proper fit.
Standard vs. High-Capacity Thickness
While most residential systems use 1-inch thick filters, some modern high-efficiency systems use 4-inch or 5-inch deep-pleated filters. Never try to force a thicker filter into a narrow slot, as this will prevent the cover from closing and disrupt airflow.
Choosing the Right Type for Your Lifestyle
Not every home requires the highest possible filtration level. In fact, using a filter that is too restrictive for an older HVAC system can cause the motor to work harder. Consider these factors when making your selection.
- Pets: If you have shedding dogs or cats, look for a filter with an MPR of at least 1000 to handle the increased dander.
- Smokers: To remove smoke odors and fine ash particles, a filter with an MPR of 1900 or higher is most effective.
- Children and Seniors: High-rated filters (MPR 1500+) provide extra protection against airborne illnesses and fine pollutants.
- Budget: Basic filters are more affordable but need to be replaced more frequently and offer less respiratory protection.
When to Replace Your Filter
For most households, the standard recommendation is to change the filter every 90 days. However, this timeframe can change based on several variables. Regularly checking your filter is the best way to maintain air quality.
Signs You Need a Change
If you notice a visible layer of gray dust on the filter surface, it is time for a replacement. Other signs include an increase in household dust, longer HVAC run times, or a slight musty smell when the air turns on. During peak summer or winter months when the system runs constantly, you may need to change the filter every 30 to 60 days.
The Impact of Pets and Environment
Homes with multiple pets or those located in areas with high outdoor pollution or construction should inspect filters monthly. A clogged filter restricts airflow, which can lead to higher energy bills and expensive repairs for your blower motor.
How to Install a New Filter Properly
Installing a replacement is a simple process that most homeowners can complete in less than five minutes. Follow these steps for a successful installation:
- Turn off the HVAC system: For safety, ensure the unit is not running while you swap the filters.
- Remove the old filter: Slide it out of the slot or remove the vent cover to access it. Note the direction of the arrow on the old filter.
- Check for dust: Use a damp cloth to wipe away any dust buildup around the edges of the filter slot.
- Insert the new filter: Ensure the airflow arrow printed on the filter frame points toward the furnace or air handler.
- Secure the cover: Replace any clips or vent covers and turn the system back on.
Advanced Features: Smart Filters
For those who want to take the guesswork out of maintenance, there are smart filter options available. These filters include a Bluetooth-enabled sensor that tracks airflow and usage. This sensor syncs with an app on your smartphone to provide real-time updates on the filter’s life and notify you exactly when it needs to be replaced.
Conclusion
Choosing the right HVAC filter is a simple yet powerful way to protect your home’s air quality and your mechanical systems. By understanding MPR ratings and ensuring a proper fit, you can breathe easier knowing your indoor environment is clear of pollutants. Remember to check your filter monthly and replace it at least once a season to keep your home running smoothly. For more tips on home maintenance and improving your living space, explore our other helpful guides on indoor air management and appliance care.