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Category "Air Purifiers"

4Feb

Air Purification vs Ventilation

by Priyanka Gupta
Air Purifiers HVAC

Indoor air quality has become a serious concern in recent years as people spend more time indoors at homes, offices, schools, and commercial spaces. Pollutants like dust, allergens, smoke, odors, and even microscopic particles can build up inside, affecting comfort, health, and overall well-being.

In the middle of this growing awareness, many people assume that ventilation and air purification mean the same thing. After all, both are linked to “cleaner air,” right? Not exactly.

While both ventilation and air purification help improve indoor air quality, they work in completely different ways and solve different parts of the problem. Understanding this difference is the first step toward creating a healthier indoor environment.

What is Ventilation?

Ventilation is the process of bringing fresh outdoor air into a building while pushing out stale indoor air. Its main role is to keep the indoor environment feeling fresh and breathable by constantly replacing used air with new air.

Proper ventilation also plays an important role in controlling carbon dioxide (CO₂) levels, which can rise in crowded or closed spaces and cause discomfort, tiredness, and poor concentration. In addition, it helps remove lingering odors and excess humidity, reducing the chances of dampness, mold growth, and that heavy, stuffy feeling many people experience in poorly ventilated rooms.

We recently completed a basement ventilation project using axial fans, jet fans, CO sensors, and lift pressurization fans to maintain safe CO levels. Check out the full case study here: Instagram Link

Types of Ventilation:

1. Natural ventilation (windows, vents): Uses openings like windows and vents to allow fresh outdoor air to flow in and stale air to flow out naturally.

2. Mechanical ventilation (exhaust fans, fresh air systems, AHUs with fresh air): Uses powered systems and fans to actively bring in fresh air and remove indoor air in a controlled way.

3. Balanced ventilation systems: Supply and exhaust fans work together to bring in fresh air and remove stale air in equal amounts for stable airflow.

Best For:

➤ Improving oxygen levels: Ventilation brings a steady supply of fresh outdoor air inside, helping maintain comfortable and healthy oxygen levels.

➤ Reducing stuffiness and indoor pollutant buildup: Regular air exchange removes stale air, lingering odors, and trapped indoor pollutants before they can build up.

What is Air Purification?

Air purification is the process of cleaning the air inside a space by removing harmful contaminants, without necessarily bringing in fresh outdoor air. Instead of exchanging air, purification systems focus on treating the air that is already indoors.

Our HEPairé air purifiers are designed for this exact purpose. Equipped with certified H14 HEPA filters paired with G4 pre-filters, efficient UV lights, and ultra-low noise EC fans, HEPairé units remove airborne pollutants while consuming minimal power. Available in models AURA, PURA, and ASTRIA, they cater to residential, commercial, institutional, and hospital applications, ensuring clean, safe, and comfortable indoor air for spaces of all sizes.

This is especially useful in areas where outdoor air quality is poor or where additional filtration is needed. By continuously circulating and cleaning indoor air, HEPairé purifiers help make the air safer to breathe and more comfortable for occupants.

What Air Purifiers Remove:

1. Dust and fine particles (PM2.5, PM10): Air purifiers capture tiny airborne particles that can enter the lungs and affect breathing.

2. Allergens (pollen, pet dander): They help reduce allergy triggers by filtering out common airborne allergens.

3. Bacteria and some viruses: Certain advanced filters and technologies can trap or deactivate harmful microorganisms in the air.

4. Smoke and odors (with carbon filters): Activated carbon filters absorb smoke, fumes, and unpleasant smells from indoor air.

Common Air Purification Technologies:

1. HEPA filters: High-efficiency filters that trap extremely fine airborne particles, including dust, allergens, and microscopic pollutants.

2. Activated carbon filters: Special filters that absorb gases, chemicals, smoke, and unpleasant odors from the air.

3. UV-C systems: Use ultraviolet light to help neutralize bacteria, viruses, and other microorganisms as air passes through.

4. Ionizers (with caution): Release charged ions to make particles settle out of the air, but should be used carefully due to possible ozone generation.

Best For:

➤ Best for areas with polluted outdoor air: Air purifiers clean the air indoors without relying on outside air, making them useful where outdoor pollution levels are high.

➤ Reducing airborne particles and microbes: They help lower the concentration of fine particles, allergens, and certain microorganisms circulating in indoor air.

Key Differences Between Ventilation and Air Purification

FeatureVentilationAir Purification
Brings in fresh airYesNo
Removes indoor stale airYesNo
Filters tiny particlesNot alwaysYes
Controls CO₂ levelsYesNo
Works when outdoor air is pollutedCan bring pollution inYes (if filtered)

Why Ventilation Alone is Not Enough

1. Outdoor air isn’t always clean: Fresh air can carry dust, vehicle emissions, smoke, and other pollutants indoors.

2. Limited filtration of fine particles: Basic ventilation systems may not effectively remove very small particles like PM2.5.

3. Allergens can enter easily: Pollen and other outdoor allergens can be brought inside through ventilation.

4. Air quality depends on location: Buildings in urban or industrial areas may introduce more pollution than fresh air.

5. No direct air cleaning function: Ventilation mainly dilutes contaminants rather than actively removing microscopic pollutants.

Why Air Purification Alone is Not Enough

1. Doesn’t control CO₂ levels: Air purifiers clean the air but do not bring in fresh oxygen, so carbon dioxide can still build up in occupied spaces.

2. No humidity management: They do not remove excess moisture, which can lead to dampness, discomfort, or mold growth.

3. Air may still feel stale: Without fresh air circulation, indoor spaces can feel stuffy even if particles are being filtered.

4. Limited odor removal from sources: While some purifiers reduce smells, they don’t eliminate the root causes like poor ventilation or trapped air.

5. No air exchange: Purifiers recirculate indoor air rather than replacing old air with fresh outdoor air.

The Ideal Solution: Combining Ventilation and Air Purification

When it comes to indoor air quality, the best approach is not choosing one over the other it’s using both ventilation and air purification together.

Simply put: Healthy indoor air = Fresh air + Clean air

Ventilation brings fresh outdoor air inside and pushes stale air out. Air purification cleans the air by removing dust, allergens, and other harmful particles. When combined, they create a healthier and more comfortable indoor environment.

At Degree Day, we understand that ventilation and air purification work best together. As experts in designing smart HVAC solutions, we help you find the right balance based on your building type, occupancy, and outdoor air quality ensuring safer, healthier, and truly comfortable indoor spaces.

Get in Touch

Please share your details below and we’ll get back to you soon.

25Dec

HEPA Filters for Clean Rooms

by Priyanka Gupta
Air Purifiers HVAC

Maintaining ultra-clean air is not optional in controlled environments; it is essential. Clean rooms are used in industries where even microscopic contamination can lead to product failure, safety risks, or regulatory non-compliance. From pharmaceutical manufacturing to semiconductor fabrication, HEPA filters for clean rooms play a critical role in achieving and maintaining stringent air quality standards.

Why HEPA Filters Are Essential in Clean Rooms

Clean rooms are designed to control airborne particles, temperature, humidity, and pressure. Among these factors, airborne particle control is the most critical, and this is where clean room HEPA filtration systems come into play.

HEPA filters ensure that the air entering and circulating within the clean room meets strict cleanliness levels required by international standards such as ISO 14644 and GMP (Good Manufacturing Practices). Without HEPA filters, maintaining consistent air purity would be nearly impossible.

Clean Room Classifications and HEPA Filtration

Clean rooms are classified based on the number of particles allowed per cubic meter of air. Common classifications include:

➢ ISO Class 1–3: Ultra-clean environments (microelectronics, nanotechnology)
➢ ISO Class 4–6: Pharmaceutical production, medical device manufacturing
➢ ISO Class 7–8: Biotechnology labs, packaging areas

Higher-class clean rooms require ceiling-mounted HEPA filters, often combined with laminar airflow systems, to deliver continuous, uniform, and contamination-free air.

HEPA Filters vs ULPA Filters in Clean Rooms

While HEPA filters are the industry standard, some clean rooms use ULPA (Ultra-Low Penetration Air) filters. The choice depends on application requirements:

➢ HEPA Filters: Suitable for most pharmaceutical, medical, and laboratory clean rooms
➢ ULPA Filters: Used in extremely sensitive environments like semiconductor and aerospace manufacturing

For the majority of clean room applications, HEPA filters provide the optimal balance of efficiency, airflow, and cost-effectiveness.

Installation of HEPA Filters in Clean Rooms

Proper installation is just as important as filter quality. Even a small leak around a HEPA filter can compromise the entire clean room environment. Clean room HEPA filters are typically installed in:

➢ Ceiling grid systems
➢ Fan Filter Units (FFUs)
➢ Terminal HEPA filter housings
➢ Wall-mounted return air systems

Professional installation ensures:

➢ Airtight sealing (to prevent air bypass)
➢ Uniform airflow distribution
➢ Compliance with clean room standards

Maintenance and Replacement of Clean Room HEPA Filters

Well-maintained HEPA filters help extend HVAC system life and ensure uninterrupted clean room operation. Regular maintenance is essential to ensure long-term performance. Over time, HEPA filters accumulate particles, increasing air resistance and reducing airflow.

Key Maintenance Practices:

➢ Routine pressure drop monitoring
➢ Scheduled airflow testing
➢ Integrity testing (DOP/PAO testing)
➢ Timely replacement based on usage and environment

Industries That Rely on HEPA Filters for Clean Rooms

➢ Pharmaceutical & Biotechnology
➢ Medical Device Manufacturing
➢ Semiconductor & Electronics
➢ Food & Beverage Processing
➢ Aerospace & Defense

Regulatory Compliance and Certifications

Clean room HEPA filters must comply with recognized standards, including:

➢ ISO 14644 Clean Room Standards
➢ EN 1822 HEPA Filter Testing
➢ GMP and FDA Guidelines
➢ ASHRAE Recommendations

Using certified HEPA filters ensures regulatory approval, audit readiness, and consistent product quality.

Cost Considerations and Long-Term Value

Investing in high-quality HEPA filtration is a cost-effective decision for any clean room facility. While clean room HEPA filters may appear expensive initially, they offer long-term value by:

➢ Reducing product rejection rates
➢ Minimizing downtime
➢ Preventing regulatory penalties
➢ Improving operational efficiency

Degree Day Private Limited – Your Clean Room Air Purification Partner

Degree Day Private Limited is a trusted provider of clean room HVAC systems, HEPA filters, and complete air purification solutions. With expertise in clean room design, engineering, installation, and maintenance, Degree Day delivers turnkey solutions tailored to industry-specific requirements.

Why Choose Degree Day?

➢ End-to-end clean room solutions
➢ High-quality HEPA filtration systems
➢ Compliance with ISO, GMP, and industry standards
➢ Experienced engineering and project execution teams
➢ Reliable after-sales support and maintenance services

Degree Day’s solutions are designed to ensure long-term performance, regulatory compliance, and operational efficiency.

FAQs Related to Clean Room & Air Purification

1. How often should HEPA filters be replaced in clean rooms?

Replacement typically occurs every 2–5 years, depending on usage, airflow load, and the level of contamination.

2. Where can I get certified HEPA filter-equipped air purifiers in India?

You can get certified HEPA filter-equipped air purifiers from Degree Day Pvt. Ltd. under its premium air purification brand HEPairé, which is available in three models: Aura, Pura, and Astria.

3. Can clean rooms operate without HEPA filters?

No. HEPA filters are essential to meet clean room air cleanliness standards.

4. Are HEPA filters tested after installation?

Yes. Integrity testing, such as PAO or DOP testing, is mandatory after installation.

5. Do HEPA filters affect clean room airflow?

Properly selected HEPA filters ensure optimal airflow while maintaining filtration efficiency.

6. Are all HEPA filters suitable for clean rooms?

No. Only certified clean room HEPA filters designed for controlled environments should be used.

9Dec

How PM2.5 and PM10 Impact Your Lungs

by Priyanka Gupta
Air Purifiers

Air pollution is a major issue around the world, and most of us don’t realize just how much it affects our daily health. Every time we step outside, we are breathing in tiny particles, especially PM2.5 and PM10. They are so small you can’t see them, but they can do real damage to your lungs and overall well-being. In this guide, we will break down what these particles are, how they affect your lungs, and what you can do to stay protected.

What Are PM2.5 and PM10?

PM10 (Inhalable Coarse Particles): PM10 refers to larger tiny particles 10 micrometers or smaller. They come from things like road dust, construction sites, and even pollen. Even though they are bigger than PM2.5, they can still enter your nose, throat, and lungs.

PM2.5 (Fine Particles): PM2.5 is much smaller, only 2.5 micrometers or less, nearly 30 times thinner than a strand of hair. Because of their size, these particles can travel deep into your lungs and even move into your bloodstream. They are mainly produced by car exhaust, industrial pollution, wildfires, and cigarette smoke.

How PM2.5 and PM10 Affect Your Lungs

Even though you can’t see them, these particles can cause a wide range of health issues.

1. Irritation and Coughing – Both PM2.5 and PM10 can irritate your airways and trigger coughing, sneezing, or wheezing. People with asthma or allergies often feel the effects more intensely.
2. Deep Lung Damage (Especially from PM2.5) – PM2.5 can reach the deepest parts of your lungs, slipping past your body’s natural defenses. Once inside, they can cause inflammation, infections, and make breathing much harder.
3. Chronic Lung Diseases – If you are exposed to polluted air for years, the risks become more serious. Long-term exposure can lead to asthma, bronchitis, or COPD conditions that make everyday breathing a challenge. Children, older adults, and people with existing lung issues are especially vulnerable.
4. Heart and Bloodstream Problems – One of the biggest concerns with PM2.5 is that it can enter your bloodstream. Once there, it can raise blood pressure, strain your heart, and even increase the risk of heart attacks and strokes.
5. Worse During Winter – Pollution tends to spike in winter because cold air traps dirty air close to the ground. This “temperature inversion” makes it harder for pollutants to disperse, which can make breathing especially difficult for people with asthma.

Who’s Most at Risk?

Air pollution affects everyone, but some groups are more sensitive than others:

+ Children – Their lungs are still developing.
+ Older adults – They may have weaker lungs or heart conditions.
+ Pregnant women – Pollution can even impact unborn babies.
+ People with lung or heart problems – Conditions like asthma and COPD can worsen.
+ Outdoor workers – They spend more time exposed to polluted air.

How to Protect Your Lungs from PM2.5 and PM10

You can’t control outdoor air pollution, but you can take steps to reduce its impact:

1. Use an Air Purifier: A HEPA air purifier can help remove both PM2.5 and PM10 particles from your indoor air.

If you are serious about keeping your indoor air clean, Degree Day’s Greencon HEPaire range is definitely worth checking out. It comes in three powerful models designed for different needs, whether you are looking to protect your family at home or maintain clean air in a commercial space:

– Aura – Perfect for residential use, compact yet highly efficient.
– Pura – A versatile option for mid-sized spaces with strong filtration performance.
– Asteria – Built for larger or commercial areas that need heavy-duty purification.

And here’s a bonus:
Tripure – An advanced air purifier combined with a bladeless fan, giving you clean air and smooth airflow in one sleek, modern device.

2. Wear a Mask: On days when the air quality is poor, wearing an N95 mask can dramatically reduce how many harmful particles you breathe in.
3. Check Air Quality Levels: Apps like SAFAR and AQICN show real-time pollution levels. If the numbers are high, try limiting your time outdoors.
4. Avoid Outdoor Exercise: Working out makes you breathe deeper, which means more pollutants enter your lungs. Stick to indoor workouts when the air is bad.
5. Keep Your Home Clean and Ventilated: Regular dusting and vacuuming can help lower indoor pollution. Good ventilation ensures fresh air circulates without trapping harmful particles.

What the WHO Says About PM2.5 and PM10

The World Health Organization has set annual limits to help protect public health:

  • PM2.5: Should not exceed 5 µg/m³
  • PM10: Should not exceed 15 µg/m³

Sadly, many cities around the world exceed these limits, which makes taking personal precautions even more important.

Download WHO Guidelines

Key Takeaways

  • PM2.5 is the most harmful because it can reach deep into your lungs and bloodstream.
  • Both PM2.5 and PM10 can cause long-term lung issues and even heart disease.
  • WHO recommends keeping PM2.5 levels below 5 µg/m³ for better health.
  • You can protect your lungs by using air purifiers, checking air quality, wearing masks, and staying indoors on polluted days.

PM2.5 and PM10 may be tiny, but they can have a huge impact on your health over time. Staying aware of air quality, especially if you live near busy roads, factories, or urban areas, can help you make smarter choices. With a few simple steps like wearing a mask, avoiding outdoor exercise on high-pollution days, and keeping your indoor air clean, you can protect your lungs and breathe easier every day.

Get in Touch

Please share your details below and we’ll get back to you soon.

11Nov

Best HVAC Company in Lucknow

by Priyanka Gupta
Air Purifiers Bladeless Fans EPC Services evaporative cooler HVAC HVAC Ducts

Lucknow has always been a city of balance, a blend of tradition and progress, of history and innovation. As the skyline continues to rise and new businesses establish themselves across the city, one thing has become clear: comfort and air quality are no longer luxuries, but essentials.

That’s where Degree Day steps in. With over 25 years of experience and ISO 9001:2015 certification, Degree Day has established itself as a trusted name in the world of HVAC design, manufacturing, and turnkey solutions across North India. Whether it’s a hospital requiring precision air control or a commercial complex demanding energy efficiency, the company has earned a reputation for delivering results that last.

Need Advice?Want Product Catalogues?


More Than Just Air Conditioning: A Complete HVAC Experience

When people hear “HVAC,” they often think of cooling or heating systems. But true comfort goes beyond temperature. It’s about air quality, circulation, humidity, and even energy management.

Degree Day specializes in turnkey HVAC solutions, which means we handle every aspect of your project from the first consultation to the final commissioning. You don’t have to coordinate with multiple vendors or stress about technical details. Our experts take care of everything:

1. Site Evaluation: Understanding Your Space, Requirements, and Energy Needs.
2. System Design: Creating tailored solutions that perfectly fit your environment.
3. Installation: Flawless execution with safety and efficiency in mind.
4. Maintenance & Support: Routine inspections and reliable after-sales service to keep systems performing at their best.

It’s a smooth, worry-free experience, the way professional climate control should be.

Why Businesses Across Lucknow Trust Degree Day

Over the years, Degree Day has earned a reputation for precision, reliability, and genuine trust. Our journey has taken us across a wide range of industries, from advanced cleanrooms and large-scale manufacturing facilities to hospitals, retail spaces, and modern corporate offices.

In Lucknow and throughout Uttar Pradesh, we offer comprehensive HVAC solutions tailored to every type of space, including basement ventilation, cleanroom environments, hospitality setups, showrooms, residential complexes, commercial buildings, and full-scale industrial projects. Whatever the need, our focus remains the same: delivering comfort, efficiency, and performance that lasts.

Here’s what sets them apart:

1. Decades of Experience: With 25+ years in the HVAC industry, their team understands every technical and environmental challenge Lucknow presents.
2. Quality Without Compromise: All projects adhere to global standards, including ISHRAE and ASHRAE guidelines.
3. Energy Efficiency First: Their systems are designed to reduce energy costs while maintaining superior performance.
4. Customized Designs: Every project is unique, and so is every Degree Day solution.
5. Transparent Pricing: No hidden costs, no surprises, just honest, value-driven service.

From design to execution, Degree Day ensures that every system not only performs but also endures.

Trusted by India’s Leading Brands

Degree Day’s portfolio in Lucknow speaks volumes. Some of the region’s most respected names rely on our HVAC systems for efficient and reliable operations, a true mark of trust and capability.

Our Clients in Lucknow Include:
Kanpur Plastic, Viraj Constructions, Birla Dharamshala (Ayodhya), Lete Hue Hanuman Mandir, Safety Shoes Manufacturing Unit, Ex-CM Residence, Delhivery Warehouse (Lucknow), Ford Car Showroom, and many more.

Smart, Sustainable, and Ready for the Future

In today’s world, efficiency and sustainability go hand in hand. Degree Day integrates smart automation and eco-friendly HVAC technologies to help clients cut energy use without compromising comfort.

Our products & Services include centralized air conditioning, UVGI-based air purification, prefabricated ducts, Mist Cooling System, Bladeless Fans, Exhaust Fans, Basement Ventilation, HVAC Design, HVAC Projects, Clean Room Solution, HEPA Air Purifiers, Air Washer, Air Handling Units, Single, Dual and Hybrid Evaporative Cooling System, and smart energy control, all engineered to ensure clean, safe, and sustainable indoor environments.

Whether it’s a high-end commercial space or an industrial setup, Degree Day’s team ensures the perfect balance between technology, performance, and environmental responsibility.

Why Local Expertise Matters

Lucknow’s climate can be unpredictable sweltering summers, humid monsoons, and chilly winters. Generic systems simply don’t cut it here. Our deep understanding of local weather patterns and building needs means their solutions are built for real conditions, not assumptions.

We don’t just install machines; we design environments where people can work, heal, and live comfortably all year round.

Building Better Air, Together

Comfort isn’t just about cooling a room; it’s about creating spaces that help people feel better, work smarter, and breathe easier. That philosophy drives everything Degree Day does.

Whether you’re planning a new project or upgrading an existing system, Degree Day is ready to design, deliver, and maintain an HVAC solution that aligns with your vision and budget.

Quick Highlights

● 25+ years of HVAC expertise
● ISO 9001:2015 Certified
● Turnkey project design & execution
● Energy-efficient and eco-friendly systems
● Trusted by India’s leading brands

Frequently Asked Questions

1. What makes Degree Day the best HVAC company in Lucknow?

With 25+ years of experience and ISO 9001:2015 certification, Degree Day delivers reliable, high-performance HVAC systems. From design to maintenance, every project is tailored for efficiency, durability, and Lucknow’s unique climate.

2. What types of HVAC solutions does Degree Day offer?

They offer complete HVAC solutions – centralized AC, air purification (UVGI + HEPA), prefabricated ducts, air washers, evaporative air coolers, air purifiers, cleanroom systems, ventilation setups, and hybrid cooling for homes, offices, and industries.

3. Does Degree Day handle end-to-end HVAC projects?

Yes. Degree Day manages turnkey projects from site evaluation and design to installation, commissioning, and maintenance—ensuring a smooth, worry-free process.

4. Why is local HVAC expertise important for Lucknow projects?

Lucknow’s hot, humid climate needs specialized systems. Degree Day’s local experience ensures efficient, weather-optimized solutions that perform year-round.

5. Which leading clients trust Degree Day’s HVAC solutions in Lucknow?

Trusted by brands like Kanpur Plastic, Viraj Constructions, Birla Dharamshala (Ayodhya), Lete Hue Hanuman Mandir, and Ford Showroom, among others.

Get in Touch

Please share your details below and we’ll get back to you soon.

15Oct

HEPAire: Best Air Purifier for Delhi 2026

by Priyanka Gupta
Air Purifiers

Why Delhi Needs the Best Air Purifier

If you live in Delhi, you already know clean air has become a luxury. Every winter, smog, dust, and traffic emissions combine to create a thick layer of pollution that turns the air toxic. The city’s AQI regularly crosses the “hazardous” mark, making it unsafe to breathe, even indoors.

That’s where a high-quality air purifier comes in. For anyone in Delhi, it’s no longer optional; it’s essential. A reliable HEPA air purifier filters out harmful particles, dust, and allergens, helping your family breathe easier and stay healthier, no matter how bad the pollution gets outside.

Looking for HEPA Air Purifier – Enquire Now

Why Air Purifiers are a Must-Have in Delhi

1. Severe Winter Smog: After Diwali, the combination of stubble burning, vehicle emissions, and cold weather traps pollutants close to the ground, turning Delhi’s air dangerously grey.
2. Health Risks: Prolonged exposure to PM2.5 and PM10 particles can lead to breathing troubles like asthma, bronchitis, and even heart problems.
3. Indoor Pollution: Don’t underestimate indoor air! Dust, cooking smoke, and pet dander make your home air just as polluted, especially in tightly closed apartments and offices.

PM2.5 and PM10: Why They Matter in Delhi

Delhi’s air pollution is largely driven by PM2.5 and PM10 particles, microscopic dust, and pollutant particles released from vehicles, construction, industrial emissions, and seasonal stubble burning.

While PM10 affects the nose and upper respiratory tract, PM2.5 is far more dangerous because it penetrates deep into the lungs and can even enter the bloodstream. During peak winter months, PM2.5 levels in Delhi often rise several times above safe limits, increasing the risk of asthma, bronchitis, heart disease, and long-term lung damage.

This is why choosing an air purifier with True HEPA (H13/H14) filtration and high CADR is essential to effectively remove these fine particles indoors.

👉 Read our detailed guide on PM2.5 vs PM10 and their health impact.

Air Quality Index (AQI) Chart: From Good to Severe

S.NoAQI CategoryAQI Range
1Good0–5
2Satisfactory51–100
3Moderate101–200
4Poor201–300
5Very Poor301–400
6Severe401–500

What to Look for in the Best Air Purifier for Delhi

When you are shopping for an air purifier, here’s what really matters, especially for Delhi’s harsh conditions:

FeatureWhy It MattersRecommended Specification
HEPA FilterTraps fine dust, smog, and allergens for cleaner air.True HEPA (H13/H14) – 99.97% efficiency
Activated Carbon FilterRemoves odors, gases, and VOCs from pollution.Let’s you run it longer without worrying about power bills.
UVGI / UVC TechnologyKills germs, viruses, and bacteria trapped inside filters.High-grade carbon filter with a large surface area
CADR (Clean Air Delivery Rate)Indicates how fast your purifier cleans the air.300+ m³/hr for small rooms, 800+ m³/hr for large spaces
Energy EfficiencyBelow 55 dB at max speedEC (Electronically Commutated) Motor
Noise LevelKeeps your space peaceful while it works.Below 55 dB on max speed
Coverage AreaEnsures the purifier suits your room size.200–1000 sq. ft.
Build QualityHandles Delhi’s dust and heavy use.Powder-coated or galvanized metal body
CertificationsLet’s you run it longer without worrying about power bills.CDC, ASHRAE, ISHRAE compliant

HEPA Air Purifier Limitations in Delhi

1. HEPA air purifiers can definitely make your indoor air cleaner, but they can’t do much about the heavy outdoor pollution in Delhi that inevitably sneaks inside.
2. Another common mistake people make is buying a purifier that’s too small for their space. To really work, you need the right CADR rating and proper room coverage; otherwise, it’s like using an umbrella in a storm.
3. While HEPA filters are great at trapping dust and fine particles, they don’t remove gases, odors, or VOCs unless paired with activated carbon or UV technology.
4. And in Delhi’s smoggy conditions, those filters get clogged faster than you’d expect, meaning more frequent replacements and higher maintenance costs.
5. Plus, for your purifier to work efficiently, your room needs to be fairly sealed. But that also means less fresh air coming in, and over time, rising CO₂ levels can make the space feel stuffy.

Easy Maintenance Tips for Long-Lasting Performance

Keeping your air purifier clean ensures it keeps your air clean, too. Here’s how:

1. Replace HEPA Filters on Time: Every 6–12 months, sooner during peak smog season.
2. Clean the Pre-Filter Monthly: A simple rinse keeps airflow smooth.
3. Check Filter Availability: Always use genuine HEPairé filters for the best results.
4. Place It Smartly: Keep it in an open spot, not hidden in a corner.
5. Wipe the Exterior: Regular dusting helps maintain consistent airflow.

Do’s and Don’ts for Air Purifier Use

Do ThisAvoid This
Keep the purifier in an open, central area.Don’t block airflow behind furniture.
Clean pre-filters monthly.Don’t wash non-washable HEPA filters.
Replace filters every 6–12 months.Don’t delay replacements; it reduces performance.
Close doors and windows while in use.Don’t keep it near open windows.
Use original filters only.Don’t use cheap imitations.
Follow maintenance reminders.Don’t ignore filter warning lights.

HEPairé Purifier Models Comparison

FeaturesHEPairé AURAHEPairé PURAHEPairé ASTRIA
Filtration SystemH14, G4H14, UVGI, G4H14, UVGI, G4
CADR (CFM)3855001160
Coverage Area (CDC)240 sq. ft310 sq. ft725 sq. ft
Coverage Area (AHAM)575 sq. ft750 sq. ft1750 sq. ft
Power Consumption (W)30–120 (W)40–140 (W)75–275 (W)
Sound Level (dB)50–6545–6348–65
DesignCompactTower TypeIndustrial-Grade
Enquire Now

Applications of HEPA Air Purifiers

Degree Day HEPA Air Purifiers are designed to meet the air quality needs of every environment, ensuring cleaner, fresher, and healthier indoor air. Ideal for homes, offices, hospitals, and large institutional spaces.

Commercial Spaces: Enhance air quality in commercial areas, including:

1. Cabins and Rooms (80–250 sq ft)
2. Mid-sized Spaces (250–700 sq ft)
3. Large Spaces like Showrooms and Offices (700 sq ft & above)

Hospitals & Healthcare Facilities: Maintain clean and safe air for patients and staff:

1. OPDs (Outpatient Departments)
2. Reception Areas
3. ICU Units
4. Isolation Rooms
5. General & Deluxe Wards
6. Nurse Stations

Residential Spaces: Create a healthier living environment at home:

1. Bedrooms
2. Living Rooms
3. Drawing Rooms

Institutional Spaces: Perfect for educational and public institutions:

1. Hotel Guest Rooms
2. Banquets & Restaurants
3. Public Waiting Areas
4. Classrooms
5. Libraries
6. Worship Places

And here’s a bonus

Tripure is an advanced air purifier combined with a bladeless fan, delivering purified air and smooth, uninterrupted airflow in one sleek, modern device. Designed for both efficiency and elegance, it ensures your space stays fresh, safe, and comfortably cool all at the same time.

Why Choose HEPairé Air Purifiers for Delhi

HEPairé air purifiers are designed specifically for Delhi’s extreme air conditions. Every model combines True HEPA (H14) filtration with UVGI sterilization to remove dust, bacteria, and even microscopic pollutants from your air.

You also get:

– High CADR for faster air cleaning
– Energy-efficient EC motors for 24/7 operation
– Durable metal construction that lasts for years

Whether you’re purifying the air in your home, office, clinic, or classroom, HEPairé gives you cleaner, fresher air even when Delhi’s AQI hits the “severe” mark.

Frequently Asked Questions

1. Which is the best air purifier for Delhi homes?

The HEPairé PURA and AURA are perfect for homes and bedrooms. They’re quiet, efficient, and come with True HEPA and UVGI protection.

2. Do air purifiers actually help during smog season?

Yes, absolutely. A high-CADR purifier with HEPA + carbon filters can remove PM2.5, smoke, and toxic gases, even when pollution spikes after Diwali.

3. How often should I change the filters?

In Delhi, replacing filters every 6–8 months ensures your purifier keeps running at peak performance.

4. Are HEPairé filters easy to find?

Yes. All filters and parts are available through HEPairé’s official dealers and verified online stores.

5. How much area does the Degree Day HEPA air purifier cover?

HEPairé purifiers offer coverage from 100 sq. ft. to 1750 sq. ft., suitable for everything from small rooms to large commercial and medical spaces.

When it comes to Delhi’s air, protection starts at home. Choosing the right air purifier can make a huge difference in your health, comfort, and peace of mind.

With HEPairé air purifiers, you get advanced HEPA filtration, UV sterilization, high CADR performance, and low noise, everything you need for clean, breathable air year-round.

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