Can You Put Filters On Furnace Registers

Changing a Wall Vent Filter — © mokee81 / Adobe Stock

All HVAC systems include a furnace filter, simply many homeowners are also purchasing air filters for their vents. These optional filters are bought in sheets which may be then cut to fit both annals and air return vents throughout the firm. While helpful, vent filters are not platonic for all homes and may or may not exist worth the investment.

Weighing the Pros and Cons

As with any optional component of an HVAC system, vent filters have both positive and negative qualities which may affect whether they will do good your home. Knowing these qualities will help y'all brand a more than informed conclusion before making a purchase.

Benefits of Vent Filters

Calculation vent filters to your home serves as an extra line of defense against dust and allergens. These particles can enter the ducts through cracks and bypass the main furnace filter. Dust tin can also accumulate in the vents during periods of inactivity, further polluting your home.

Drawbacks of Vent Filters

The biggest drawback of vent filters is restricted airflow. Filters ho-hum the passage of air. As particles build upwards on them, the amount of obstruction increases. This can cause your arrangement to work harder, using upwards more power and potentially overheating components.

In improver, these filters volition require regular changing, merely every bit your main filter does. This, in turn, requires you to access each vent that contains a filter several times per year. While that might not be difficult in some cases, it can pose issues when the target vent is in a difficult-to-accomplish location, such equally high on a wall higher up furniture.

Consider the MERV Rating

When choosing a vent filter, you lot should always aim for a MERV (Minimum Efficiency Reporting Value) rating of 6 to 8. The lower the number, the less air is obstructed, although it will as well let more particles through. This rating calibration is an industry standard and is an excellent way to balance filtration and airflow restriction.

MERV 6

Filters with a MERV rating of half dozen are the lowest quality recommended for household use. Compared to a bones fiberglass filter, MERV 6 filters perform approximately eight times amend. Filters at this rating tin can filter out numerous large particles, including:

Allergens such every bit pet dander, pollen, and dust mite droppings
dirt and grit
lint
random small debris

MERV 8

While air filters for your home may have a MERV rating of upwards to 13, MERV 8 is the highest recommended for vent filters. These filters yet permit for practiced airflow, but are approximately 20 times more efficient than fiberglass filters, making them an excellent selection for homes where family unit members fume or people are more than allergy-sensitive.

Nonetheless, these exercise not eliminate all allergens, simply large-particle ones.

Are Filters Right for Your Domicile?

Changing a Ceiling Vent Filter — © steheap / Adobe Stock

Air filters tin can make a big difference in some situations, but do not always solve air quality bug. Air quality tin exist caused past a number of sources, and your furnace filter does a skillful job of protecting from airborne particles under normal circumstances.

When to Go Vent Filters

Vent filters can be an excellent way to augment your main filter, and are useful for homes where your HVAC system remains off for much of the twelvemonth.

In such places, the filters help to reduce dust accumulation in the vents themselves. This may besides assist reduce the heated dust smell which occurs when your furnace is commencement turned on afterwards sitting for a long time.

While they cannot eliminate the problem entirely, vent filters can also assist reduce airborne allergens such every bit pet dander and pollen. These particles normally get pulled into the return vents and are caught in the furnace filter, but they can also exist pulled into cracks in your ductwork and forced into rooms through the registers.

When to Avoid Vent Filters

Sometimes, using vent filters in an older habitation is no better than placing a bandage over a broken bone. The ductwork may accumulate holes or cracks over fourth dimension, and seals tin can break. A common symptom of this is a habitation where rooms get together dust quickly, while the furnace filter stays relatively clean.

In such cases, vent filters tin can catch a big percentage of particles, merely the leaks in your ducts will too be impacting your heating bills. Getting the ductwork checked and repaired is the best solution and may show cheaper long-term.

Another trouble in older houses is often the furnace itself. Furnaces must be fed air in order to keep from overheating or struggling to remain active. In such cases, adding filters to your air returns may reduce the amount of airflow enough to affect the furnace.

Making sure you take a filter with a MERV rating of six may help reduce the number of pollutants reaching the principal filter from the firm, but vent blockages or other problems may mean even these low-density filters can choke your furnace.

If you are unsure whether filters in the render vents will touch the furnace, it is best to either phone call a professional person or avert them altogether.