Assuming your existing filter is sized correctly, look to see if the dimensions of height, width, and depth are printed on its frame. Look for the model number on your existing filter's frame. Look at the manual for your indoor unit and see if it lists the correct air filter dimensions.
To determine the size of your current filter, look for the sizing information printed on the side of the filter. Once you have determined the size of your current air filter, there are various options to buy replacement filters, including: Contact your local Carrier expert (dealer).
To determine your air filter size, you need to measure its length, width, and depth. These measurements are usually printed on the side of the filter. If not, you can use a tape measure to get the dimensions.
Find your condensing unit and search for a data plaque or sticker on the side. You should see a model number and a string of numerals and letters. There should also be an even, two-digit number – which indicates the AC tonnage of the unit. This number is typically between 18 and 60.
The easiest way to find out what size filter to get for your furnace is to simply remove your current filter and look at its dimensions. These are typically printed along with one of the sides of your filter.
Technically, the ⌀ symbol is standard drafting notation for "diameter". But yes, on a lens that symbol will always represent the required filter size (filters are sized based on the diameter of their screw-on connection).
You should be able to see the model number on a rating-plate or decal right on the front of a ventilator or an evaporator coil and on the side if you have a fan coil.
Finding the tonnage of your AC unit may be as simple as walking outside and reading the label on the condenser unit. Most of the time, manufacturers don't list tons, though; they list BTUs instead. Lucky for you, we already taught you that math! Simply divide the BTUs by 12,000 to calculate the tonnage of your unit.
Carrier/Payne/Bryant
Carrier systems made in the last 20 years or so encode the week and year of manufacture within the first 4 digits. The first 2 are the week of the year (1-52) and the second are the year. For example 0199 would mean the system was made the first week of January in 1999.
Air filters are commonly located between the return duct and the air handler. If you still have not found your air filter or furnace filter, look between the return duct and the air handler. The air handler is a large metal box that houses the fan and its motor.
What Are the Different Sizes of Air Filters? Air filters come in a variety of sizes, with some of the common ones being 10 x 20, 14 x 20, 16 x 24, 18 x 30, 20 x 30, and 24 x 24. These measurements are in inches and represent the length, width, and sometimes the thickness of the filter.
The recommended minimum filter surface area is 2.50 cubic feet per minute (cfm) per square inch of filter area. Example 1: 2000 cfm ÷ 250 inches = 800 square inches or 20" X 40" filter grill. The maximum allowable filter velocity is 300 feet per minute (fpm) on disposable filters.
Look at Your Existing Air Filter
If your HVAC system has an air filter, you can look for its size to ensure you can get the right replacement. Most filters have sizes listed on the side in print, including the length, width, and depth in inches. Usually, they're listed in that order.
Some should be replaced every 30 to 60 days. Others might last 6 months to a year. The answer depends on factors such as how often you use the system, the type of filter, whether there are any pets in the home, and your personal habits such as having smokers in the house, use of a wood-burning fireplace, and more.
Usually, you can find the diameter by looking for the geometric symbol on the body of the lens - “ø”. The number next to that is the one you need. If you can't find it on your lens though, just take a look at your user manual or the manufacturer's site, and it should be pretty easy to find.
Simply divide the BTUs by 12,000 to calculate the tonnage of your unit. For example, if your air conditioner is 36,000 BTUs, you have a 3-ton unit. Some manufacturers bury tonnage or BTU information in their model numbers. Look for an even, two-digit number between 18 and 60.
In the worst circumstance, the incompatible system may not function at all. Or, it may seem to operate initially and then break down after some time. In all circumstances, the machine's efficiency and longevity will be compromised.
An air conditioner's model number is a string of numbers and letters. Within the string, you should see an even, two-digit number. Add three zeroes to the number and you have the BTU rating. Divide the two-digit number by 12, and you have the tonnage.
Finding your Carrier AC's tonnage is easy! Check the nameplate on the outdoor condenser unit. It'll have a model number and a string of numbers/letters. Look for a two-digit number - that's your tonnage!
Carrier Corporation was acquired by United Technologies Corporation (UTC) in July 1979. Prior to the acquisition by UTC, Carrier Corporation was known as the Carrier Air Conditioning Company. International Comfort Products (ICP), headquartered in Lewisburg, Tennessee, was acquired by Carrier in 1999.
Check the label, which should be on the side of your filter. The listed dimensions are your filter's nominal size. If the filter fits properly, order a filter with the same nominal size from any manufacturer. If your current filter isn't labeled, take manual measurements.