Updated September 2026: I checked current filter prices and replacement schedules on AirDoctor’s website. Prices and subscription discounts can change, so use the figures below as a planning estimate.
Affiliate disclosure: This guide contains affiliate links. HomeVib may earn a commission if you buy through them, at no extra cost to you.
Quick answer
At current one-time prices, plan on roughly $170 a year for the AirDoctor 1000, $127 for the 2000, $172 for the 3500, $220 for the 4000, and $355 for the 5500. The 1000 and 4000 estimates use two combined filters per year. The other estimates use AirDoctor’s listed one-year filter packs.
Check current AirDoctor filter prices
AirDoctor filter cost by model
| Model | Replacement product | Current price | Estimated yearly cost |
|---|---|---|---|
| AirDoctor 1000 | Combined replacement filter | $84.99 each | About $170 |
| AirDoctor 2000 | One-year filter combo pack | $126.99 | About $127 |
| AirDoctor 3500 | 3000/3500 one-year filter combo pack | $171.99 | About $172 |
| AirDoctor 4000 | Combined replacement filter | $109.95 each | About $220 |
| AirDoctor 5500 | 5000/5500 one-year filter combo pack | $354.99 | About $355 |
Prices were checked in September 2026. Taxes, shipping, sales, and subscription discounts are not included.
Why the schedules are different
The 2000, 3500, and 5500 separate the Carbon/VOC filter from the UltraHEPA filter. AirDoctor recommends changing the carbon filter every six months and the UltraHEPA filter every 12 months. The one-year packs include the pieces needed for that schedule.
The 1000 and 4000 use a combined replacement filter. AirDoctor currently recommends a six-month replacement schedule for both models. That means the 4000’s $109.95 filter can cost about $219.90 per year if you follow the schedule exactly.
The filter light is a reminder, but your home matters too. Heavy smoke, renovation dust, several shedding pets, or long daily run times may shorten filter life. A cleaner room with regular pre-filter care may be easier on the filters.
AirDoctor 1000 filter cost
The current AirDoctor 1000 filter is listed at $84.99. It combines the pre-filter, Carbon/VOC material, and UltraHEPA layer in one replacement part. AirDoctor recommends changing it every six months, making the current yearly estimate $169.98.
AirDoctor 2000 filter cost
The one-year combo pack for the 2000 is $126.99 at the time of this update. It includes one UltraHEPA filter, two Carbon/VOC filters, and two attached pre-filters. AirDoctor says the pack saves 10% compared with buying the filters separately.
This is the lowest clear one-year pack price in the current lineup. It is one reason the 2000 is a good choice for a bedroom or office. Our AirDoctor 2000 vs. 3500 guide compares the lower running cost with the 3500’s extra airflow.
AirDoctor 3500 filter cost
AirDoctor lists the one-year 3000 Series filter pack at $171.99 and groups the 3000 and 3500 under the same filter section in its store. Confirm the model name on the filter listing before ordering, especially if AirDoctor changes the package name.
The pack contains the yearly UltraHEPA replacement and the two Carbon/VOC filters needed for the six-month schedule. That makes the simple annual estimate about $172 before a sale or subscription discount.
I have used the 3500 for years, and filter cost is the main recurring expense worth planning for. The pre-filter should be vacuumed rather than automatically thrown away. Keeping hair and dust off it helps airflow and prevents larger debris from loading the inner filters too quickly.
AirDoctor 4000 filter cost
The 4000 replacement filter currently costs $109.95. AirDoctor recommends changing the combined filter every six months, so the straightforward yearly estimate is $219.90.
That is higher than the 3500’s current one-year pack even though the two purifiers have similar purchase prices. The 4000 does have a higher smoke CADR and a different shape, so filter cost is not the only reason to choose. Read our AirDoctor 4000 review before deciding.
AirDoctor 5500 filter cost
The 5000 Series one-year combo pack is listed at $354.99 and is the pack used for the large 5000/5500 filter group. The price is high because the 5500 uses two Carbon/VOC filters and two UltraHEPA filters.
This model makes financial sense only when you need its 556 CFM smoke CADR and extra-large-room coverage. Putting a 5500 in a normal bedroom means paying for airflow and filter area the room does not need.
See current AirDoctor offers and filter options
How to spend less on replacements
- Vacuum the pre-filter monthly. Turn the unit off and follow the manual before removing it.
- Buy the correct yearly pack. The combo packs are cheaper than buying the included filters one at a time at current prices.
- Compare the subscription price. AirDoctor currently advertises a recurring discount, but check the delivery schedule and cancellation terms.
- Do not buy a larger purifier than the room needs. Bigger filters cost more.
- Check the filter light and the filter itself. A fixed calendar is useful, but unusually dusty or smoky conditions can change the timing.
Are third-party filters worth it?
Cheaper filters are easy to find, but fit, airflow resistance, carbon quantity, and particle-filter construction can differ. I would compare more than the size and product photo. A filter that restricts airflow can reduce how much clean air the purifier delivers.
AirDoctor recommends its own replacement filters. If warranty coverage matters to you, read the current warranty terms before using a third-party part. HomeVib has not tested off-brand AirDoctor filters, so I cannot tell you that a cheaper copy performs the same.
The cost that matters most
Compare the purifier and three years of filters, not just the price on the unit:
- 2000: $399 unit plus about $381 in filters over three years
- 3500: $659 unit plus about $516 in filters over three years
- 4000: $679 unit plus about $660 in filters over three years
- 5500: $999 unit plus about $1,065 in filters over three years
These are rough figures based on current list prices and stated schedules. They do not include electricity, discounts, taxes, or price changes. See the full AirDoctor model comparison for room size and airflow details.
