
Breathe Pure: Find Your Perfect Blue Star Purifier
A Head-to-Head Comparison of the BS-AP300DAI & AP420OAN
Create a Healthier Home Environment
Blue Star Air Purifiers are engineered to deliver a cleaner, healthier, and more comfortable indoor atmosphere. By effectively removing airborne pollutants like dust, pollen, smoke, and microscopic allergens, our purifiers help alleviate respiratory issues and create a sanctuary of pure air for you and your family.
Compare Models Side-by-Side

Blue Star BS-AP300DAI
MRP: ₹10,490.00
- Coverage AreaUp to 300 sq. ft.
- CADR444 m³/hr
- Filtration System3-Stage Filtration
- SensAir Technology✔️ Yes
- Air Quality IndicatorDigital Display
- Fan Speeds3 Modes

Blue Star AP420OAN
MRP: ₹19,990.00
- Coverage AreaUp to 592 sq. ft.
- CADR675 m³/hr
- Filtration System5-Stage Filtration
- SensAir Technology✔️ Yes
- Air Quality IndicatorDigital + Color
- Fan Speeds4 Modes + Auto
Which Model Is Right For You?
Choose the BS-AP300DAI if...
- ✔You need to purify a bedroom, home office, or small living area (up to 300 sq. ft.).
- ✔You're looking for an effective, high-value, and budget-friendly solution.
- ✔A compact, easy-to-use design is a priority for your space.
Choose the AP420OAN if...
- ✔You have a large living room, master bedroom, or open-plan space (up to 592 sq. ft.).
- ✔You want the most advanced, multi-stage purification for comprehensive protection.
- ✔Features like Auto Mode and advanced air quality feedback are important to you.
Core Technology & Benefits
SensAir Technology
Intelligently detects pollutants and auto-adjusts fan speed for optimal, energy-efficient performance.
Advanced HEPA Filtration
Captures 99.97% of tiny airborne particles, including dust, allergens, and viruses, for truly clean air.
Whisper Quiet Operation
Engineered for minimal noise, ensuring a peaceful and undisturbed environment for work or sleep.
Frequently Asked Questions
How often do I need to change the filters?
Filter life depends on usage and local air quality. On average, replace filters every 8-12 months. Both models feature a convenient filter change indicator.
What is SensAir Technology?
SensAir uses an advanced sensor to monitor your room's air quality in real-time. It automatically adjusts the purifier's speed to tackle pollutants efficiently, saving energy when the air is clean.
Can the air purifier run 24/7?
Absolutely. Blue Star Air Purifiers are built for continuous operation. The Auto Mode is perfect for maintaining clean air around the clock with maximum efficiency.
Do these purifiers remove odors and smoke?
Yes, the Activated Carbon filter in both models is specifically designed to absorb and neutralize common household odors, pet smells, and smoke from cooking or cigarettes.
What does the 5-stage filtration in the AP420OAN include?
The advanced 5-stage system includes a Pre-filter for large particles, a HEPA filter for microscopic allergens, an Activated Carbon filter for odors, a UV lamp to neutralize viruses and bacteria, and an Ionizer to freshen the air.
Can I clean the pre-filter?
Yes, the pre-filter is washable and should be cleaned every 2-4 weeks to maintain optimal performance and extend the life of the other filters. Simply rinse it with water and let it dry completely before placing it back.
How noisy are these units?
Both models are designed for quiet operation. On the lowest setting, they are whisper-quiet, making them ideal for bedrooms. Noise levels will increase at higher fan speeds but remain comfortable for daytime use.
What is the warranty on these products?
Blue Star air purifiers typically come with a standard manufacturer's warranty. Please check the product page or contact our sales team for specific warranty details and terms for each model.
Why Choose Me Shop For Your Blue Star Air Purifier?
Expert Advice
Our knowledgeable team helps you choose the perfect air purifier for your specific needs and room size.
Competitive Pricing
We offer the best value for your investment, ensuring you get a high-quality product at a fair price.
Genuine Products
Shop with confidence knowing you're receiving a 100% authentic Blue Star purifier with a full manufacturer's warranty.
Dedicated Support
Our commitment doesn't end at the sale. We're here to assist you with after-sales service and support.
Ready to Breathe the Difference?
Contact our expert team for personalized advice or to place your order today.