AirDoctor AD3500 3-Stage UltraHEPA Air Purifier vs AirDoctor AD5500 3-Stage UltraHEPA Air Purifier
These are side-by-side facts taken from each product guide: published specifications, strengths and caveats as their sources state them. This page is not a test, a ranking or a verdict about which model is better.
AirDoctor AD3500 3-Stage UltraHEPA Air Purifier
Rooms up to about 630 sq ft by AirDoctor's four-changes-per-hour figure
AirDoctor's AD3500 pairs a carbon filter with potassium permanganate and an UltraHEPA filter behind a pre-filter. AirDoctor gives 630 square feet at four air changes per hour and a 340 CFM smoke CADR. Carbon is changed every six months, UltraHEPA yearly, under a one-year warranty.
Published specifications
- AirDoctor: 630 sq ft at 4 air changes per hour
- AirDoctor: smoke CADR 340 CFM (standard not stated)
- AirDoctor: 15.75 W x 8.75 D x 23 H in, 18 lb
- Listing: carbon every 6 months, UltraHEPA every 12
- Listing: PM2.5 auto mode, 4 fan speeds, timer
- AirDoctor: one-year limited warranty, service fee applies
Strengths
- Listing describes a carbon stage with potassium permanganate
- Clear four-changes-per-hour room figure from the maker
- Filters shared with the older AD3000
Caveats
- Carbon filter needs replacing every six months
- One-year warranty with a shipping and processing fee
- No manual found online for clearance or cleaning
Read the full AirDoctor AD3500 3-Stage UltraHEPA Air Purifier guide
AirDoctor AD5500 3-Stage UltraHEPA Air Purifier
Large open rooms around 1,000 sq ft with space for a tall floor unit
AirDoctor's AD5500 runs two sets of pre-filters, carbon filters and UltraHEPA filters. AirDoctor gives 1,043 square feet at four air changes per hour and a 556 CFM smoke CADR. It stands 28.75 inches tall, needs paired filter changes, and carries a one-year warranty.
Published specifications
- AirDoctor: 1,043 sq ft at 4 air changes per hour
- AirDoctor: smoke CADR 556 CFM (standard not stated)
- AirDoctor: 16 x 16 x 28.75 in, 33 lb
- AirDoctor: two pre, two carbon, two UltraHEPA filters
- Listing: carbon every 6 months, UltraHEPA every 12
- AirDoctor: one-year limited warranty, service fee applies
Strengths
- High airflow for large open rooms per the maker's figures
- Two permanent pre-filters listed in the box contents
- Six fan speeds per the listing
Caveats
- Every filter change is a pair of filters
- Listing coverage figures differ from AirDoctor's
- One-year warranty; no manual found online
Read the full AirDoctor AD5500 3-Stage UltraHEPA Air Purifier guide
How to choose between them
Choose the AirDoctor AD3500 3-Stage UltraHEPA Air Purifier if your situation matches: Rooms up to about 630 sq ft by AirDoctor's four-changes-per-hour figure. Its main caveat: Carbon filter needs replacing every six months.
Choose the AirDoctor AD5500 3-Stage UltraHEPA Air Purifier if your situation matches: Large open rooms around 1,000 sq ft with space for a tall floor unit. Its main caveat: Every filter change is a pair of filters.
Both entries repeat what each guide records. Confirm the model, included parts and availability on the current listing before ordering.
Primary sources
- AirDoctor product page for the AirDoctor 3500 Source for AirDoctor AD3500 3-Stage UltraHEPA Air Purifier
- AirDoctor 3000-series replacement filters for AD3500 and AD3000 Source for AirDoctor AD3500 3-Stage UltraHEPA Air Purifier
- AirDoctor one-year limited warranty page Source for AirDoctor AD3500 3-Stage UltraHEPA Air Purifier and AirDoctor AD5500 3-Stage UltraHEPA Air Purifier
- AirDoctor product page for the AirDoctor 5500 Source for AirDoctor AD5500 3-Stage UltraHEPA Air Purifier
Primary sources checked .