Air Purifier Calculator
Find the perfect air purifier for your room size, health needs, and budget. Get instant CADR recommendations, ACH analysis, and personalized product suggestions.
Air Purifier Calculator
Room Dimensions
Your Air Purifier Needs
- Choose an air purifier with at least 103 CFM CADR
- Place purifier in central location away from walls
- Run continuously for best results
Recommended Air Purifiers for Your Space
Based on your 192 sq ft room requiring 103 CFM CADR for 4 air changes per hour.
Coway Airmega 100
Premium choice: 109 CFM provides 4.3 ACH, allowing quieter operation on lower speeds. Whisper-quiet at 24 dB.
Blueair Blue Pure 511
Premium choice: 112 CFM provides 4.4 ACH, allowing quieter operation on lower speeds. Whisper-quiet at 24 dB.
Blueair Blue Pure 411
Perfect match: Delivers exactly the 103 CFM needed for 4 ACH in your 192 sq ft room.
Air Purifier Quick Reference
CADR Guidelines
ACH Standards
Filter Types
Placement Tips
Complete Air Purifier Analysis
CADR Calculation
Precise Clean Air Delivery Rate requirements based on room volume and air change targets
ACH Analysis
Air Changes per Hour assessment to ensure adequate air cleaning for your needs
Health Matching
Suitability assessment for allergies, asthma, pets, and other health conditions
Smart Recommendations
Personalized air purifier suggestions based on your requirements and budget
How Our Air Purifier Calculator Works
Room Measurement
Enter your room dimensions to calculate volume and determine base CADR requirements
Health & Use Case
Select your primary needs (allergies, asthma, pets) to adjust requirements for optimal health benefits
ACH Target
Set desired Air Changes per Hour from 2 (basic) to 8 (medical grade) for your air quality goals
Smart Analysis
Get comprehensive results with CADR needs, health suitability, and personalized product matches
Real-World Calculator Examples
See how our calculator helps different users find their perfect air purifier
Bedroom Allergies
Needs 80 CFM CADR. Recommended: Levoit Core 300 (141 CFM) - Quiet operation at 24dB, perfect for nighttime allergy relief.
Living Room Pets
Needs 160 CFM CADR. Recommended: Coway AP-1512HH (246 CFM) - Excellent pet hair capture with washable pre-filter.
Home Office Focus
Needs 40 CFM CADR. Recommended: GermGuardian AC4825 (118 CFM) - Budget-friendly with UV-C light for germs.
Baby Nursery
Needs 97 CFM CADR. Recommended: Levoit Core 400S (260 CFM) - Smart features, whisper-quiet, app control for naptime.
Open Floor Plan
Needs 267 CFM CADR. Recommended: Winix 5500-2 (360 CFM) - PlasmaWave tech for odors, auto mode with sensors.
Try Your Room
Every room is unique. Get personalized recommendations based on your exact needs, room size, and health requirements.
Frequently Asked Questions
What is CADR and why does it matter?
CADR (Clean Air Delivery Rate) measures how many cubic feet of clean air an air purifier produces per minute. It's the most important spec because it tells you actual cleaning performance, not just fan speed.
How many air changes per hour do I need?
For general use: 2-3 ACH. For allergies or pets: 4-5 ACH. For asthma or severe conditions: 6+ ACH. Higher ACH means cleaner air but also higher costs and noise.
Should I buy one large purifier or multiple small ones?
For rooms over 400 sq ft, multiple smaller purifiers often work better than one large unit. They provide better air circulation and allow you to focus cleaning where it's needed most.
Can an air purifier be too powerful for my room?
Not really! A more powerful purifier can run at lower speeds for quieter operation while still delivering excellent air quality. It's better to have too much power than too little.
How do I know if an air purifier is working?
Look for reduced allergy symptoms, less dust accumulation, and cleaner-smelling air. Many modern purifiers have air quality sensors and displays to show real-time improvements.
What's the difference between True HEPA and regular filters?
True HEPA filters must capture 99.97% of particles 0.3 microns or larger. Regular filters might only capture 60-80%. For health conditions, True HEPA is essential.
Why Use Our Air Purifier Calculator?
Avoid Oversized or Undersized
Get exactly the right power for your space. No wasted money on overkill units or disappointment from underpowered purifiers.
Health-Focused Recommendations
Unlike generic calculators, we factor in specific health conditions and provide ACH targets that actually improve your symptoms.
Real-World Performance
Our calculations account for actual room conditions, not just theoretical lab performance. Get realistic expectations and results.