When sourcing air purifiers for OEM or private label projects, one of the most common questions buyers face is: which CADR rating matches which room size? Getting this wrong leads to customer returns, bad reviews and poor repeat purchase rates. This guide explains CADR in plain terms and helps you match the right model to your target market.
What Is CADR?
CADR stands for Clean Air Delivery Rate. It measures how quickly an air purifier delivers clean, filtered air into a room — expressed in cubic feet per minute (CFM) or cubic metres per hour (m³/h). A higher CADR means the unit cleans the air faster.
CADR is tested independently by AHAM (Association of Home Appliance Manufacturers) in the United States and is one of the most reliable metrics for comparing purifier performance across different brands and models.
CADR to Room Size: The General Rule
The standard recommendation is to choose a purifier with a CADR value that is at least two-thirds of the room's square footage (in square feet). For metric markets, multiply the room area (m²) by ceiling height (typically 2.5m) to get room volume, then match to a purifier rated for at least 5 air changes per hour (ACH).
| Room Type | Typical Area | Recommended CADR | Suitable Models |
|---|---|---|---|
| Small bedroom / desk | 10–20 m² | 80–150 m³/h | Compact desktop, round portable |
| Master bedroom / office | 20–35 m² | 150–250 m³/h | Cylindrical, square bedroom |
| Living room / open plan | 35–60 m² | 250–400 m³/h | Smart tower, large floor model |
| Large living room / commercial | 60–100 m² | 400–600+ m³/h | Commercial / industrial unit |
How CADR Affects Your Product Positioning
For e-commerce sellers on Amazon or Shopify, entry-level compact models (CADR 80–150 m³/h) priced at US\$30–\$60 retail are the highest-volume SKUs. They target bedrooms, dorm rooms and personal desks. Margin per unit is lower but volume is high and repeat filter sales add long-term value.
For distributors and retail chains, mid-range models (CADR 150–300 m³/h) work best. These target family bedrooms and living rooms, command a retail price of US\$80–\$180, and are suitable for in-store display with strong visual presence.
For project buyers and B2B channels (hotels, clinics, offices), high-CADR units (300–600+ m³/h) are required. These buyers care about CADR certification documentation, filter replacement schedules and multi-unit supply consistency.
What to Tell the Factory When Requesting a Quote
To get an accurate model recommendation and price direction, share the following when inquiring:
- Target room size — e.g. "Bedroom, 15–25 m²" or "Living room, 35–50 m²"
- Target country — affects plug standard (US/EU/UK/AU), voltage (110V/220V) and required certifications
- Sales channel — Amazon FBA, retail shelf, B2B distributor, hotel supply
- Retail price target — helps the factory recommend models that fit your margin requirement
- Customization needs — logo, packaging, manual language, filter SKU plan
CADR and Filter Life: What Buyers Often Overlook
A high CADR unit running at maximum speed will consume filter capacity faster. When planning your product line, consider offering a replacement filter SKU from the start. A model with a 6-month filter cycle at moderate fan speed creates predictable repeat purchase revenue — especially important for Amazon Subscribe & Save or distributor restocking programmes.
LYL Clean Air supports filter programme planning as part of OEM/ODM projects. Contact our team for model recommendations matched to your room size requirements and target market.
