AIR PURIFIERS, WITHOUT THE GUESSWORK
THE AIR.
THE NUMBERS.
A clearer view of what you’re breathing, buying, and running.
Understand the room. Decode the label. Find out what a purifier really costs to live with.
44 products in the library · Independent desk research
The filter catches particles. Air passes through filter media. Different pollutants need different approaches.
Size the room.Volume before marketing claims.
Understand the airflow.Numbers with their assumptions.
Count the running costs.The price tag is only the beginning.
02 / CHANGE A NUMBER. SEE THE DIFFERENCE.
YOUR ROOM.
YOUR VARIABLES.
Small room, tall ceiling, bigger fan.
Make the invisible a little easier to understand.
Illustrative room math
Dial in your room.
Change the room size and clean-air delivery. See the equivalent air changes per hour (ACH). These are illustrative inputs, not product measurements or a safe-air threshold.
300 ft² × 8 ft = 2,400 ft³. At 250 CFM, the formula estimates 6.25 ACH.
Formula and units
ACH = CFM × 60 ÷ room volume in cubic feet. Room volume = area in square feet × ceiling height in feet. This simplified calculation assumes the stated CFM is continuous clean-air delivery and evenly mixed through the room. For general background on air-cleaner sizing, see the EPA guide to air cleaners in the home.
Illustrative ownership budget
Estimate a three-year total.
Enter your own assumptions. This is a planning estimate, not a price quote or a claim about any particular unit.
Average replacement budget: $0 per month.
03 / MEET THE HARDWARE
Take a closer look.
ON THE BENCH / 01
AirDoctor AD3500
Start with the filter, then read the fine print.
Explore the dated research, filter-cost discussion, and gaps in the product record.
Product imagery for reference. Desk research, not a recommendation or hands-on test.
ON THE BENCH / 02
Airpura R600
A different shape. The same questions.
Compare the evidence behind airflow, filter media, and replacement costs.
Product imagery for reference. Desk research, not a recommendation or hands-on test.
ON THE BENCH / 03
AirFanta reference
Look inside the format.
A box-shaped purifier and separate filter panels. Exact 3Pro model in the supplied image is unconfirmed.
Product imagery for reference. Desk research, not a recommendation or hands-on test.
04 / THE READING ROOM
A FIELD GUIDE
TO BETTER QUESTIONS.
The Beginner's Guide to Air Quality Equipment: Start Here Before You Spend Anything
Start with the room, the pollutants, and the numbers that matter.
Research notes GUIDEBudget & Small-Room Purifiers: A Category Briefing, Not a Buying Guide
Understand the tradeoffs behind a smaller purifier and a smaller price tag.
Research notes GUIDEMid-Size Purifiers: A Category Briefing, Not a Buying Guide
A reading guide to airflow, filter economics, and the busy middle of the market.
Research notes