Air changes per hour (ACH) refers to how many times the air is changed with new, clean air in a given space within the span of an hour. A Harvard University Study cited by the CDC recommends at least 4 air changes per hour to effectively remove allergens like smoke, bacteria, viruses, dust, and pollen.

CADR, or Clean Air Delivery Rate, refers to your air purifier’s efficiency in removing these three contaminants over time: pollen, dust, and smoke. Higher CADR numbers indicate better air cleaning performance. The smoke CADR number is most stringent, reflecting the unit’s ability to eliminate the smallest and most dangerous particles from your indoor air.

Great question! Choosing the right air purifier will depend on the size of your room and the air circulations per hour. According to the Harvard University study, 4 air changes per hour are recommended for optimal purification. AirDoctor units are designed to meet this standard.

AirDoctor 1000: Replace UltraHEPA® and Carbon/VOC filters every 6 months.

All other AirDoctor units:

• Replace Carbon/VOC filters every 6 months.
• Replace UltraHEPA® filters every 12 months.

The indicator light on your AirDoctor will also light on when it’s time to replace your filter

– no more guesswork!

We stand behind the quality of our products. That’s why we offer a 30-day money-back guarantee on all purchases. If for any reason you’re not completely satisfied with your AirDoctor, simply reach out to our friendly customer service team at 1-800-221-2515, and we’ll gladly issue you a full refund, minus shipping and processing fees.

Yes! If you’re interested in a payment plan option, just select the Affirm payment option at checkout and follow the instructions. Terms and conditions apply.**

**Various purchase plans are available based on approval. Regretfully, Affirm is NOT available in Iowa or West Virginia due to state-specific financial regulations.

Yes! We’ve partnered with Truemed to make it easy for you to get reimbursed for your AirDoctor products using your HSA or FSA funds.

To see if you qualify, follow the steps below after making your purchase:

1) Fill out the short intake form from Truemed to check your eligibility. You’ll find the link to the form in your AirDoctor order confirmation email.

2) If approved, Truemed will email you a Letter of Medical Necessity within 24 hours.

3) Send this letter, along with your order confirmation receipt, to your HSA/FSA provider for reimbursement.

It’s that simple!

The Commercial purifiers were initially designed for schools, community buildings, and government officers and come with an UltraHEPA® and a Double Pleated Pre-Filter. The double pleated pre-filter is designed to capture larger contaminates such as ash and debris from wildfire, pet hair, and dust. These pre-filters meet the HEPA4 standard, providing an extra layer of filtration. The UltraHEPA® filter captures ultra-fine particles as small as 0.003 microns, including allergens, bacteria, viruses, and wildfire smoke. 

Genuine AirDoctor VOC filters are compatible with commercial units and can be added easily to increase protection from harmful gases.

The Commercial units do not come with a VOC filter, and they do not have an Auto mode or indicator light like the consumer models. 

When changing your filters, consider the following:

3000M – If you have the AirDoctor 3000M, you can replace your existing double pleated pre-filter with a new one, or you can replace the double pleated pre-filter with a Carbon/VOC filter at any time. The Carbon/VOC comes with its own attached pre-filter.

5000H – If you have the AirDoctor 5000H, you can either replace the double-pleated pre-filter with a Carbon/VOC filter or add the Carbon/VOC filter to the pre-filter and UltraHEPA. The 5000H can accommodate all three filters simultaneously, providing extra protection. Note: Using all three filters may slightly reduce the CADR.