Your question: Do thicker furnace filters last longer?

Thicker air filters tend to last longer because they have more square footage to capture and hold air particles. To put it in perspective, a 1-inch air filter may need to be changed every month whereas a 4-inch air filter could last up to six months.

Do thicker furnace filters restrict airflow?

You just need the right kind of high MERV filter. A thicker filter (4-5 inches) has more surface area and therefore allows more room for air to pass through.

How long do thick air filters last?

Thicker filters can last longer than thinner ones. Here’s a rough estimate on how long one can last, based on its thickness. Filters that are 1 to 2 inches thick should be replaced every 1 to 3 months. Filters that are 3 to 4 inches thick should be replaced every 6 to 9 months.

Are thick air filters better?

Most air filters are 1 inch thick, but some systems can accommodate filters 2 to 5 inches thick. In our tests, we found that the thicker the filter, the better it works and the longer the replacement intervals. That means it’s better for you and for your heating, ventilating, and air conditioning (HVAC) system.

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How can I make my furnace filter last longer?

Change the Furnace Filter

Extending the life of your furnace starts with changing the filter regularly. Instead of waiting a full 90 days before changing the filter, inspect it every 45 days to see if it’s dirty. This is important for making the furnace last longer.

Can a furnace filter be too restrictive?

All furnace filters have a MERV rating which indicates filter efficiency. … The makeup of these high-efficiency filters can be too restrictive for the unit, creating a barrier to good airflow. The HVAC system may struggle to pass air through the air filter and expend more energy in its attempts.

Is MERV 13 too high for residential?

One factor to consider is air flow through the system. … In some cases, using an air filter that is too restrictive for your system may cause low air flow problems as well. MERV 13 is the highest MERV value safe for residential furnaces; the higher ratings are used primarily in commercial units.

How often should you change 1 inch furnace filter?

In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.

When should I replace my 4 inch furnace filter?

Furnace filters are expected to last anywhere from one month to one year.

  1. 1-inch and 2-inch air filters should be replaced about every one to three months.
  2. 3-inch and 4-inch filters require replacement after six to nine months.
  3. 5-inch and 6-inch air filters need a change after nine months to one year.
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How long does a 6-inch furnace filter last?

Thicker filters don’t have to be changed as often, such as 6-inch filters, which can last between 9 to 12 months before they need to be replaced.

How thick should furnace filter be?

Furnace filters can range anywhere from 1″to 5″ in thickness. In general, the thicker the furnace filter is the more efficiently your unit work and the longer it will last.

What happens if your furnace filter is too small?

If the filter is too small, it won’t cover the entire space and may allow dust and dirt to flow past. If you’re not sure what size filter you need, check the manufacturer’s specifications or ask your HVAC technician for help choosing the right product.

Is MERV 13 bad for HVAC?

Filters within a MERV rating of 17-20 are almost never necessary in a residential home. A MERV rating of 13-16 is considered hospital level air quality, so it is unlikely your home needs any more than that.

Why does my furnace filter get dirty so fast?

Leaky Duct Work

According to ENERGY STAR, a typical house loses 20-30% of air through leaks in the duct work and poor duct connections. Leaving these untreated can not only kill your furnace filter quickly, but also result in higher energy bills.

Can I vacuum furnace filters?

Vacuuming a Filter Can’t Reach the Inner Fibers

The contaminant particles can get buried deep in the filter’s fibers, so a vacuum cleaner won’t extract all of them. The particles will create a barrier in the air filter and prevent air from passing through, which could damage your HVAC system or make it less efficient.

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How often should Merv 8 filters be changed?

The basic recommendation for furnace filters replacement is every 3-4 months for MERV 8, every 6 months MERV 10 and 11 and every year for MERV 16. There are other several factors to consider when determining when to change your home air filter.