Are furnace filters universal?

How do I know what size filter to buy for my furnace?

The easiest way to identify your AC filter size is to remove the existing filter from its slot and examine the frame of the filter. Usually, the filter size is printed along the edge of the filter’s frame.

Are all furnace filters the same?

No, HVAC air filters differ in quality and dimensions, and some have features that others don’t. In most instances we advise using the filter your HVAC manufacturer recommends pairing with your system. All filters are assigned MERV ratings, which go from 1–20.

Are home air filters universal?

Universal Air Filter. … Universal air filters provide an air system with a layer of protection that keep harmful particles out and clean, fresh airflow through. The universal filters you use will be able to match a wide variety of HVAC system types, but they have their limits and will eventually need replacement.

Can I put a thinner filter in my furnace?

If you measure the filter slot, and it’s large enough to accommodate the thicker filter, then you can use it. However, if the slot is less than 4 inches wide, you’re stuck with using that thickness.

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Does type of air filter matter?

Yes, in general, the more expensive air filters are more effective, but a single person with no pets and allergies might not need as much filtration as a family of five with three pets and a child with asthma. Also consider how long your air filter will last.

Is there a big difference in home air filters?

The short answer is, no, they’re not all the same. In fact, there are many different types of air filters available and choosing the right one can make a real difference in the lifespan of your HVAC system. … You see, the higher the MERV rating, the more the filter restricts air flow.

Is an AC filter different than a furnace filter?

While many people refer to air conditioning and furnace filters as if they’re different, this is not the case. Your furnace and your air conditioning system use the exact same filter, so there’s no need to worry about purchasing separate filters for each piece of equipment.

Can I use a larger furnace filter?

If your current furnace only allows for furnace filter sizes with a depth of one inch, HVAC contractors can modify the furnace to accommodate larger sizes. This does take work and time. However, homeowners get to use better furnace filter sizes that do more for home comfort. They also worry less about their furnaces.

Can you use an air filter thats too big?

If you purchase a filter that’s too large, it won’t slide into the slot correctly. If the filter is too small, it won’t cover the entire space and may allow dust and dirt to flow past.

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Do 3m furnace filters restrict airflow?

If a Filtrete filter remains in use longer than three months, it may begin to restrict airflow or cause the system to malfunction. It also could restrict airflow in some higher efficiency/air conditioning systems. In this case, change the filter more frequently.

How do I know what air filter I need?

Look inside the section of the furnace where the air filter should go, there should be a 1″ filter track or opening where the air filter slides into. You want your air filter to cover the duct opening. Measure the height and width of the duct opening and allow for a bit of overlap if you have room.

Can I use 2 filters in my furnace?

Bottom Line: Putting two filters will not make it last longer but may make you have to replace it earlier, assuming it doesn’t already reduce air flow too much with just the filters.

How do I know what air filter to buy?

Simply, you need the filter size that fits in your air return. You can typically find that size on the side of the air filter that you already have in use. This size will be the nominal size, which means it is rounded from its actual size.