When buying an air purifier, you probably see specs like CADR or recommended room size. But here’s something most people don’t realize — those numbers don’t always mean your whole room is getting clean air.
In real homes, air doesn’t stay perfectly mixed. Pollutants gather in corners, around furniture, and near windows. That’s where Even Purification comes in — a smarter, more effective way to ensure the entire room is truly clean.
Let’s break it down.
What is Even Purification — and Why Does It Matter?
Even Purification means clean air doesn’t just float around the machine — it travels across the entire room.
Only a few brands, including Dreame, offer this kind of smart airflow design.
Even Purification = Powerful airflow + Directional wind guidance + Continuous circulation
How it works:
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Projects clean air up to 10 meters
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Uses wide-angle oscillation to sweep across the space
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Stirs the air constantly, removing pollutants from hard-to-reach areas
The result? No more dead zones. Clean air finds you — even in corners, behind furniture, or far from the purifier.
Why Upward Airflow Isn’t Enough
Many purifiers rely on upward-only airflow, which may look sleek but is surprisingly limited.
- Only purifies a small 2–3㎡ area near the device
- Struggles in large or oddly shaped rooms
- Often forces users to move the purifier manually to different locations
Dreame’s Advantage: With our Dualflow Directional Airflow, air moves across the entire room, not just upward — so pollutants come to the purifier, and clean air spreads out evenly.
Real-World Pollutants Aren’t Evenly Spread
Dust, smoke, pet dander, and odors don’t just float around evenly. They collect in places like:
- Behind sofas or under tables
- Near windows, doors, and kitchens
- In rooms with poor natural ventilation
These are the exact areas where even purification makes all the difference. Without proper circulation, traditional purifiers simply don’t reach them.
How to Calculate the Recommended Room Size and Even Purification
Air purifiers are typically rated using CADR, short for Clean Air Delivery Rate. It shows how much clean air a purifier can produce in one hour.
The formula:
Recommended Room Size (m²) = CADR (m³/h) × 0.12–0.15
For example, if CADR = 800 m³/h, → Recommended room size = ~96–120 m²
These calculations are backed by international standards like AHAM (Association of Home Appliance Manufacturers).
But here’s the catch: It assumes the air in your room is already well-mixed and moving evenly. However, that’s not how things work in real life.
Dreame’s Even Purification Formula
We don’t just measure how fast clean air comes out — we measure how far it travels and how evenly it spreads.
Our formula:
Even Purification Coverage = (Wind Distance)² × 3.14 ÷ 2
With a 10-meter wind projection, Dreame purifiers evenly cover up to 157㎡ (~1690 sq ft) of even purification coverage. That’s 50% more effective coverage than typical purifiers with the same CADR — because we don’t just clean the air, we move it where it’s needed.
What’s the difference between recommended room size and even purification coverage?
Recommended room size is based on CADR, assuming the air is already well-mixed. Even purification coverage measures how far clean air actually travels, ensuring full-room protection. With Dreame’s 10-meter wind projection, you can evenly clean up to 157㎡, reaching places most purifiers miss.
Overstated Coverage: Don’t Be Misled
Some brands push “maximum coverage” claims based on ideal lab conditions:
- Empty rooms with no furniture
- Perfect airflow and no obstructions
- Focus on PM2.5 only — ignoring VOCs, gases, and odors
- Reporting only peak airflow, not long-term or real-life efficiency
In your home, there are walls, tables, beds, and other things that block airflow. So even if the purifier is strong, clean air might not reach every part of the room.
Why Even Purification Matters
Clean air should reach where people live, breathe, and sleep — not just float around the purifier.
Even Purification is especially helpful for:
- Open-plan layouts and larger homes
- Families with kids, pets, or allergies
- High-pollution seasons, like wildfire smoke or haze
- Anyone serious about whole-room health and comfort
Dreame ensures you get true whole-room purification, not just numbers on paper. So you don’t have to struggle with where to place the purifier.
Why is even purification more important than just a high CADR?
Because air pollution isn’t evenly mixed in real life. Dust, VOCs, and allergens often settle in corners or stagnant areas. A high CADR means nothing if clean air can’t reach those spots. Dreame’s Dualflow system pushes air further and more evenly, making sure every breath you take is cleaner.
Final Thoughts
Don’t just look at CADR or recommended room size. Focus on how well your air purifier moves air around. With Dreame’s Even Purification, clean air reaches your entire space — not just around the purifier.
Because true purification means your whole room breathes better, just like you do.
