Air Purifier CADR Calculator

FAQs

What is a good CADR rate for an air purifier? A good CADR rate for an air purifier is around 200-300 CFM.

How do you calculate CADR for an air purifier? CADR is typically measured in cubic feet per minute (CFM) and is calculated by determining the volume of air that an air purifier can clean of specific particles in one minute. It's measured for three particle sizes: smoke, dust, and pollen.

What is the CADR 2 3 rule? The CADR 2/3 rule suggests that when comparing air purifiers, you should select one with a CADR rating that's at least 2/3 the size of the room you plan to use it in.

What is the CADR rating of 250? A CADR rating of 250 indicates that the air purifier can clean 250 cubic feet of air per minute for a specific particle size.

What is considered a good CADR? A good CADR rating is generally around 200-300 CFM, but the specific value depends on the size of the room you intend to use the air purifier in.

Is CADR most important for an air purifier? CADR is an important factor to consider, but it's not the only one. Filtration efficiency, room size, noise level, and additional features also matter.

Is it better to have one large air purifier or multiple small ones? Having multiple small air purifiers is often more effective, as they can distribute filtration more evenly throughout a larger space.

Is a higher CADR better? Yes, a higher CADR indicates that the air purifier can clean the air more quickly and effectively.

Can an air purifier be too big for a room? Yes, an air purifier can be too big for a room, but it's more about the purifier's CADR being too high for the room size, leading to excessive cleaning and potential discomfort.

Is CADR misleading? CADR can be helpful, but it doesn't consider factors like air changes per hour, the type of pollutants, and the overall effectiveness of the filtration system.

What CADR is best for COVID? There's no specific CADR for COVID, but a higher CADR can help in general by increasing the air exchange and reducing potential virus concentration.

What is the difference between CADR and airflow? CADR focuses on filtration efficiency, indicating how effectively particles are removed. Airflow measures the amount of air moved through the purifier without specifying filtration effectiveness.

What is the CADR rating for Blueair 411? The Blueair 411 has a CADR rating of around 120 for smoke.

Is CFM the same as CADR? CFM (cubic feet per minute) is the unit used to measure airflow, while CADR (Clean Air Delivery Rate) measures the efficiency of air purification specifically for certain particle sizes.

What is a high CADR? A high CADR would be around 300 CFM or more.

What is a good air purifier reading? A good air purifier reading is a high CADR relative to the room size, ideally around 2/3 of the room's volume.

How important is CADR rating? CADR is important, but it's just one aspect to consider alongside factors like filtration technology, noise level, and features.

Is the Blueair 411 a true HEPA filter? Yes, the Blueair 411 uses a true HEPA filter.

What is the best place to put an air purifier? Place the air purifier where it can efficiently circulate clean air, typically near the center of the room.

Should an air purifier be on the floor? Placing the air purifier on the floor allows it to capture particles that settle down. However, it can also be elevated for better airflow.

Is it good to sleep with an air purifier? Yes, it can improve indoor air quality during sleep, but consider noise levels and ensure the purifier's placement doesn't disturb your sleep.

Is it OK to leave an air purifier on all night? Yes, it's generally safe to leave an air purifier on all night, especially in a bedroom.

Why is CADR important in air purifiers? CADR indicates the air purifier's efficiency in removing specific particle sizes, helping you choose one that suits your needs.

Can air purifiers remove the COVID virus? Air purifiers with HEPA filters can capture particles similar in size to the COVID virus, but they're not guaranteed to eliminate it completely.

Do air purifiers help with COVID-19 symptoms? Air purifiers can help improve indoor air quality, which might indirectly alleviate respiratory symptoms, including those from COVID-19.

How many air purifiers should a house have? At least one per main living area is recommended, but more might be necessary for larger homes or specific concerns.

Can I move my air purifier from room to room? Yes, you can move an air purifier from room to room, but it's more effective to have dedicated purifiers in frequently used spaces.

What are the harms of air purifiers? Improper maintenance or using ozone-generating purifiers can lead to indoor air quality issues.

What does a CADR of 300+ mean? A CADR of 300+ indicates the air purifier is efficient in cleaning larger volumes of air quickly.

Why do I breathe better with an air purifier? Air purifiers remove particles that can contribute to respiratory discomfort, leading to improved breathing.

Is 75 CFM good? 75 CFM is a low CADR and might not be effective for larger spaces.

How many CFM do I need to ventilate a room? The recommended CFM for room ventilation varies but is generally around 1 CFM per square foot of room area.

What is the best CADR for air purifiers? The best CADR depends on the room size and specific needs, but a higher CADR is generally better.

How do you convert CADR to CFM? CADR is already measured in CFM. There's no need to convert.

Which brand of air purifier is the best? There are several reputable brands like Blueair, Dyson, and Honeywell, but the best choice depends on your requirements.

Do air purifiers help with mold? Yes, air purifiers with HEPA filters can capture mold spores and help prevent mold growth.

Is higher or lower CADR better? Higher CADR values are generally better as they indicate more efficient air cleaning.

Which direction should an air purifier face? It's best to place the air purifier in a location where it can circulate air effectively throughout the room, usually facing the center of the room.

Should I run my air purifier 24/7? Running the air purifier 24/7 is generally safe and effective, but consider noise levels and energy consumption.

Should an air purifier be on the floor or elevated? Placing it on the floor can capture settled particles, but elevating it slightly can improve overall air circulation.

Should I put my air purifier next to my bed? Yes, placing an air purifier near your bed can improve your sleep quality by ensuring clean air during the night.

Does an air purifier need to be in the middle of the room? Not necessarily in the exact middle, but placing it centrally helps distribute clean air more effectively.

Should you leave air purifier on all day? Yes, leaving the air purifier on throughout the day can help maintain consistent indoor air quality.

Can an air purifier be too large for a room? An air purifier's CADR can be too high for a small room, leading to excessive cleaning and discomfort.