How do I know what size filter my AC takes?

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.

How do I know what air conditioner 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.

What size filter does a Ruud furnace take?

Rheem / Ruud

OEM Brand OEM Part Number Nominal Size
Rheem / Ruud Protech 54-25051-04 16x25x5
PD540010 17x21x5
PD540016 17x21x5
PD540040 17x21x5

How do I change the filter on my Ruud air conditioner?

How to Change Ruud Air Handler Filters

  1. Turn off the circuit breaker to the Ruud air handler.
  2. Go to the air handler and locate the filter housing.
  3. Turn the screws counter-clockwise with your fingers and open the filter housing door.
  4. Place the new filter into the housing and close the filter housing door.

Do air filters have to be exact size?

Since air filters are most often sold by their nominal dimensions, it is crucial to learn how to properly measure your air filter. When making your purchase, you should order your filter by its nominal size, rather than its actual size.

Does it matter what air filter you use?

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.

What are standard air filter sizes?

Standard air filter sizes include:

10X20 14 X 20 20X20
12X12 14X24 24 X 24
12X20 14X25 20X24
12X24 14X30 20X25
12X30 15X20 20X30

Where is the filter on a Ruud?

The filter for the Ruud Achiever 90 Plus can be found in an external filter cabinet on the side and bottom of the unit.

How do I read my Ruud furnace model number?

You can determine the size in tons of your Ruud HVAC system by examining the model number on the data sticker at the side of the a/c condenser (outdoor unit). Look for the second cluster of digits of the model number. It will be a number divisible by 6 or 12, and represents the nominal BTU of the system in thousands.

How often should you change your AC filter?

about every 90 days
Newer systems often use pleated filters, also rectangular with a depth of about one inch. You should replace these about every 90 days, if you have no allergies, but AC pros typically recommend every 45 days for max efficiency. Be sure to replace them with the right size and type of air filter.