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Category "evaporative cooler"

8Sep

Evaporative Cooling

by Priyanka Gupta
evaporative cooler

Imagine walking into a factory in Indore on a 45 °C summer afternoon. Instead of the usual hot, suffocating air, you are welcomed by a cool, refreshing breeze. No air conditioners humming in the background, no massive power bills looming, just fresh, naturally cooled air.

That’s the magic of evaporative cooling. It is not a new idea—our ancestors used wet khus mats (vetiver grass) and earthen pots for cooling but today, the same principle is powering modern, energy-efficient HVAC systems across India. And in hot, dry regions like Rajasthan, Gujarat, and Madhya Pradesh, it is proving to be a game-changer.

How It Works (The Simple Science)

Think about how you feel when sweat evaporates from your skin; it cools you instantly. Evaporative cooling uses that exact principle.

Hot outside air is pulled through water-soaked cooling pads. As the water evaporates, the air temperature drops, and a fan circulates that cool, fresh air indoors. The drier the air, the stronger the effect, making it perfect for much of India’s climate.

Why It is Perfect for Indian Climates

In cities like Jodhpur, Jaipur, Indore, and Nagpur, summers are long, hot, and dry. Here, evaporative cooling can reduce indoor temperatures by 12–20 °C, making warehouses, factories, gyms, banquet halls, auditoriums, hospitals, malls, showrooms, hotels, places of worship, schools, and homes comfortable without consuming massive amounts of electricity

See Our Case Study Videos: Degree Day (@degreeday)

Unlike air conditioners, which recycle the same stale air, evaporative coolers deliver 100% fresh outdoor air a big plus for health in crowded workplaces and schools.

Benefits of Indian Businesses & Homes Love

1. Huge energy savings – Up to 80 to 90% less electricity than ACs, keeping power bills under control.
2. Lower investment – Easy to install and maintain; no complex refrigerants or compressors.
3. Eco-friendly – Just water and air—no harmful gases, no ozone damage.
4. Better indoor air quality – Fresh, filtered air improves comfort, reduces dust, and adds healthy humidity.
5. Boosts productivity – Comfortable workers mean fewer absentees and higher efficiency.

For industries like textiles in Surat, auto manufacturing in Pune, or warehouses in Delhi NCR, and factories in Lucknow, these savings directly improve the bottom line.

Challenges to Keep in Mind

– Works best in dry regions; less effective in humid states like Kerala or Bengal.
– Needs a steady water supply, which can be a concern in drought-prone areas.
– Requires regular cleaning of pads and tanks to prevent scaling or bacterial growth.
– Adds some humidity, which may not suit all indoor environments.

But for much of central, western, and northern India, the benefits far outweigh the limitations.

Applications of Evaporative Cooling

  1. Factories & warehouses – Keeping workers cool at a fraction of AC costs.
  2. Textile & garment units – Maintaining temperature control without damaging fabrics.
  3. Agriculture & poultry farms – Creating the right environment for plants and livestock.
  4. Educational institutions – Affordable comfort for schools and colleges.
  5. Retail & commercial spaces – Especially in Tier-2 and Tier-3 cities, where energy costs are a concern.
  6. Event venues – Large outdoor fans are common in wedding halls, pandals, and stadiums.

With rising electricity costs and government pushes toward energy efficiency, evaporative cooling is gaining attention as a sustainable HVAC solution. Innovations like solar-powered coolers, smart controls, and hybrid models are making the technology even more reliable for Indian conditions.

As India faces longer, harsher summers, this eco-friendly alternative to ACs will play a vital role in keeping people comfortable, cutting costs, and reducing carbon footprints.

Evaporative cooling is more than just a cost-saving option. It is a climate-smart solution designed for India’s toughest summers. Whether you are running a factory in Rajasthan, a warehouse in Madhya Pradesh, or even a school in Gujarat, this technology offers comfort, savings, and sustainability all in one package.

At Degree Day Pvt. Ltd., we design and deliver evaporative cooling solutions tailored for Indian industries, homes, and climates. If you are ready to cut electricity costs and keep cool naturally, let’s make it happen.

Frequently Asked Questions (FAQs)

What is evaporative cooling, and how does it work?

Evaporative cooling uses water evaporation to cool hot air. Warm air passes through water-soaked pads, loses heat, and is circulated as cool, fresh air.

How is evaporative cooling different from air conditioning?

Unlike ACs, evaporative coolers don’t use compressors or refrigerants. They are energy-efficient, eco-friendly, and work best in ventilated or open spaces.

Where is evaporative cooling most effective?

It’s ideal for large, well-ventilated or semi-open spaces such as warehouses, factories, workshops, greenhouses, and livestock farms. A minimum space of 500 sq. ft. is recommended for effective performance.

How much cooling can I expect?

Depending on climate and humidity, evaporative coolers can lower the temperature by 7°C to 15°C (13°F to 27°F).

Is evaporative cooling energy-efficient?

Yes. It consumes up to 80–90% less electricity compared to traditional air conditioning systems.

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27Aug

Galvanized Iron (GI) vs. Stainless Steel Ducts: Which Performs Better?

by Priyanka Gupta
evaporative cooler

When it comes to HVAC systems, ducts are often overlooked, yet they are the backbone of air distribution. Without properly designed and durable ductwork, even the most advanced cooling or ventilation system cannot perform at its best. One of the most important decisions in ductwork design is choosing the right duct material.

Not Sure Whether to Choose GI or SS Ducts? Contact Us


Two of the most common options are Galvanized Iron (GI) ducts and Stainless Steel ducts. Each comes with its own advantages, limitations, and ideal applications. While GI is widely used for commercial spaces due to its affordability, stainless steel is preferred in critical facilities where hygiene, safety, and long-term durability are essential.

What Are GI and Stainless Steel Ducts?

Galvanized Iron (GI) Ducts

  • GI ducts are manufactured from mild steel sheets coated with zinc.
  • The zinc coating helps resist rust for several years.
  • They are lightweight, easy to fabricate, and cost-effective.
  • Commonly used in malls, offices, warehouses, and standard industrial facilities.
  • The biggest advantage is low upfront cost and wide availability.

Stainless Steel Ducts

  • Made from alloy steel containing chromium, which forms a protective oxide layer against corrosion.
  • Extremely durable and hygienic, making them suitable for sensitive environments.
  • Preferred in hospitals, food processing units, pharmaceutical plants, and laboratories.
  • The key advantage is long-term reliability with minimal maintenance.

Key Comparison: GI vs. Stainless Steel Ducts

1. Durability & Corrosion Resistance

  • GI Ducts: Initially strong, but once the zinc coating wears off, the iron underneath corrodes quickly. In humid or coastal regions, lifespan may be reduced to less than 10 years.
  • Stainless Steel Ducts: Naturally corrosion-resistant. Even after decades, stainless steel maintains structural integrity, making it ideal for moisture-rich or chemical-heavy environments.

2. Strength & Performance

  • GI Ducts: Adequate for standard airflow systems but may deform under high static pressure.
  • Stainless Steel Ducts: Withstand high pressures, fluctuating temperatures, and continuous operation without losing shape or efficiency.

3. Maintenance Requirements

  • GI Ducts: Require periodic inspections, repainting, or patching. If ignored, rust spreads, reducing efficiency and lifespan.
  • Stainless Steel Ducts: Virtually maintenance-free apart from routine cleaning. No repainting or recoating needed.

4. Cost Factor & Lifecycle Analysis

  • GI Ducts: Low upfront cost. A 1,000 sq. ft. ducting project with GI may cost 40–50% less initially compared to stainless steel. However, frequent maintenance and early replacement increase long-term expenses.
  • Stainless Steel Ducts: Higher upfront investment but lower lifetime cost. A stainless steel duct can last 20–30 years, compared to GI’s 10–15 years in challenging conditions.

5. Fire Resistance & Safety

  • GI Ducts: Zinc coating deteriorates in high temperatures, exposing the iron and weakening duct strength.
  • Stainless Steel Ducts: Withstand extreme heat longer, making them more suitable for fire-rated ducts and safety-critical applications.

6. Thermal Efficiency

  • GI Ducts: Conduct heat more easily, increasing energy losses if not insulated properly.
  • Stainless Steel Ducts: Better thermal resistance and work well with insulation materials to minimize losses.

7. Installation & Fabrication

  • GI Ducts: Easy to fabricate, bend, cut, and install. Contractors are more familiar with GI, reducing labor costs.
  • Stainless Steel Ducts: Heavier, harder to cut or weld, requiring skilled labor and specialized tools. Installation time may be longer.

8. Environmental Impact

  • GI Ducts: Shorter lifespan means more frequent replacements and higher material waste.
  • Stainless Steel Ducts: 100% recyclable and longer-lasting, reducing overall environmental impact.

Global Industry Trends

  • In India and Southeast Asia, GI ducts dominate due to cost sensitivity, especially in malls and office spaces.
  • In developed countries like the US and Europe, stainless steel ducts are increasingly used in critical industries due to stricter regulations on hygiene and sustainability.
  • The Middle East prefers stainless steel in coastal cities where humidity and salt air reduce GI duct lifespan significantly.

Which One Should You Choose?

The decision depends on application, budget, and environment.

Choose GI Ducts if:

– You are working on a budget-conscious project.
– The environment is low-risk (dry, non-corrosive).
– Installation speed is a priority.

Choose Stainless Steel Ducts if:

– Hygiene and safety are top priorities (healthcare, food, pharma).
– The environment is humid, coastal, or chemically active.
– You want long-term savings with minimal maintenance.

Degree Day Expertise: Central India’s Leading HVAC Manufacturer

For over 25 years, Degree Day Pvt. Ltd. has been shaping the HVAC industry with energy-efficient, durable, and high-performance solutions. Founded in 2000, Degree Day has grown to become Central India’s largest HVAC manufacturer. Our state-of-the-art manufacturing unit in Indore is equipped with modern machinery for large-scale production. We deliver PAN India, catering to projects ranging from commercial malls and factories to critical healthcare and pharmaceutical environments. Beyond ducts, we offer a comprehensive HVAC product range:

1. Industrial & residential air coolers
2. Air Handling Units (AHU)
3. Medical Grade Air Purifiers
4. Single/Dual Stage Evaporative Coolers
5. Bladeless Fans for modern comfort

With two decades of expertise, our solutions are trusted for quality, reliability, and efficiency, making us a preferred partner for contractors, consultants, and industries across India.

Not Sure Whether to Choose GI or SS Ducts? Contact Us

Both Galvanized Iron (GI) ducts and Stainless Steel ducts play a significant role in HVAC system design.

– GI ducts are budget-friendly and easy to install, making them the go-to choice for malls, offices, and warehouses.
– Stainless steel ducts are the premium choice, delivering unmatched durability, hygiene, and safety for critical environments like hospitals, cleanrooms, and food industries.

At Degree Day Pvt. Ltd., we understand that every project is unique. With over 25 years of experience, in-house manufacturing, and a wide product portfolio, we guide clients in selecting the right ducting and HVAC solutions to maximize performance and long-term value.

Whether you need cost-effective GI ducts for a commercial project or stainless steel ducts for a healthcare facility, Degree Day delivers quality you can trust – PAN India.

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22Jul

Is evaporative cooling eco-friendly?

by Priyanka Gupta
evaporative cooler HVAC

Yes, evaporative cooling is eco-friendly because it doesn’t use a compressor and, hence, there is no chemical refrigerant involved. No Compressor = No refrigerant = Eco-friendly Cooling.

1. Uses Very Little Electricity

Regular air conditioners use a lot of power — around 8 kW per hour for a 1000 sq. ft. area. But a Greencon E-Series evaporative cooler for the same space uses only 1.1 kW per hour. That’s a 93% energy saving! Over 10 years (assuming 8 hours of use daily, 300 days a year), the difference becomes huge:

AC: 157,440 kWh
Evaporative Cooler: 21,648 kWh
Power saved: 135,792 kWh

2. CO₂ Emission Reduction

In India, every unit (kWh) of electricity causes about 0.82 kg of CO₂ emissions. So, by using an evaporative cooler instead of AC, you save over 111 tonnes of CO₂ in 10 years — for just one 1000 sq. ft. space.

3. As Good As Planting Thousands of Trees

A mature tree absorbs about 22 kg of CO₂ per year. So using an evaporative cooler instead of AC for 10 years is equal to planting 6,172 trees!

4. No Harmful Refrigerants

Air conditioners use gases like CFCs and HFCs, which can damage the ozone layer and add to global warming. Evaporative coolers don’t use any refrigerants — just air and water. Simple, safe, and sustainable.

5. Brings in Fresh Air

Evaporative coolers work by pulling in 100% outside air, cooling it with water, and then sending it indoors. This keeps the air fresh and clean — unlike ACs that recycle the same indoor air again and again.

Evaporative cooling is Energy-efficient, Non-polluting, Cost-effective, and Climate-friendly. Whether you are cooling a home, office, warehouse, or factory, switching to evaporative cooling is a smart move for your comfort, your budget, and the planet.

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17Jul

How Does HVAC System Work in Commercial Buildings?

by Priyanka Gupta
Air Purifiers evaporative cooler HVAC

Commercial buildings like malls, office spaces, hospitals, and manufacturing units rely heavily on HVAC (Heating, Ventilation, and Air Conditioning) systems for comfort, efficiency, and safety. Unlike residential setups, these systems are more complex, customizable, and capable of handling larger spaces and diverse zones. In this blog, we will explain how HVAC systems work in commercial buildings, their components, energy efficiency features, and real-world case studies.

What Is a Commercial HVAC System?

A commercial HVAC system regulates indoor air quality, temperature, and humidity in large-scale environments. Its design depends on factors like building size, usage, number of occupants, and industry-specific requirements. These systems ensure a healthy and productive environment by maintaining consistent airflow and temperature control.

Key Components of Commercial HVAC Systems

  1. Air Handling Units (AHUs): Circulate and condition air through heating or cooling coils.
  2. Chillers and Boilers: Chillers provide cold water for cooling; boilers provide hot water or steam for heating.
  3. Ductwork and Diffusers: Deliver conditioned air to various zones.
  4. Thermostats and Controls: Manage temperature settings and scheduling.
  5. Ventilation Systems: Ensure removal of stale air and replacement with fresh air.

Types of Commercial HVAC Systems

  1. Single Split Systems – Ideal for small commercial spaces with individual cooling/heating zones.
  2. Multi-Split Systems – Ideal for buildings that require multiple indoor units.
  3. VRF/VRV Systems – Variable refrigerant flow/volume systems for energy efficiency in larger buildings.
  4. Packaged Systems – All components in one unit, commonly used on rooftops.
  5. Ducted vs. Ductless – Depends on the architecture and specific room needs.

How Do Commercial HVAC Systems Work?

These systems operate in cycles:

  1. Air Intake – Fresh air is drawn in and filtered.
  2. Air Conditioning – The air is cooled or heated through chillers or boilers.
  3. Air Distribution – Conditioned air is distributed via ducts or directly through blowers.
  4. Ventilation & Exhaust – Stale air is removed and replaced with fresh, filtered air.

Each zone within the building may have independent temperature settings through zoning controls.

Zoning and Smart Controls

Modern commercial HVAC systems use smart thermostats, occupancy sensors, and building automation systems to optimize energy use. Zoning allows different areas (like conference rooms, lobbies, or production areas) to maintain independent temperatures, reducing waste and increasing comfort. Integration with IoT platforms also enables predictive maintenance.

Energy Efficiency in Commercial HVAC

  1. High-Efficiency Equipment: Units with higher SEER and EER ratings.
  2. Variable Speed Motors: Adjust based on demand rather than operating at full capacity.
  3. Economizers: Use outside air when conditions are favorable.
  4. Automation & Monitoring: Building management systems (BMS) for energy tracking and optimization.

Maintenance and Troubleshooting

Routine maintenance is essential for optimal performance and longevity:

  1. Regular filter changes
  2. Coil cleaning
  3. Checking refrigerant levels
  4. Inspecting electrical components
  5. Addressing thermostat issues

Timely troubleshooting prevents system downtime and costly repairs.

HVAC System Sizing and Load Calculation

Correct sizing prevents energy waste and equipment stress. Load calculations consider:

  1. Square footage
  2. Occupancy
  3. Equipment and lighting heat output
  4. Building orientation and insulation

Specialized HVAC System Solutions for Different Industries

  1. Healthcare: Advanced filtration and temperature control to reduce infection risk and maintain sterile environments.
  2. Data Centers: Precision cooling to protect servers and maintain optimal equipment performance 24/7.
  3. Retail: Zone-based climate control to improve customer comfort and reduce energy costs.
  4. Manufacturing: Heavy-duty ventilation to manage fumes, dust, and heat from machinery and processes.
  5. Hospitality: Quiet and efficient HVAC systems to ensure guest comfort in rooms, lobbies, and dining areas.
  6. Educational Institutions: Consistent, clean airflow to support a healthy and focused learning environment.
  7. Commercial Offices: Smart HVAC solutions for energy savings, air quality monitoring, and employee productivity.
  8. Warehousing & Logistics: Temperature and humidity control to protect sensitive goods and maintain staff comfort.
  9. Pharmaceuticals: Controlled environments with strict humidity and temperature regulation for product integrity.
  10. Food & Beverage: Ventilation and cooling to ensure hygienic processing and comfortable working conditions.

Environmental Impact and Sustainability

  1. Use of eco-friendly refrigerants (R-32, R-410A)
  2. Integration with solar power or geothermal systems
  3. BIM (Building Information Modeling) for efficient design
  4. Compliance with LEED, ASHRAE, and local codes

Real-World Case Studies: Commercial HVAC Success Stories

At Degree Day, we don’t just design HVAC systems — we deliver real, impactful solutions. Here are a few successful installations that highlight how our smart air cooling systems are transforming commercial spaces across India:

1. Function Hall – Solapur, Maharashtra
In Solapur, we equipped a function hall with two high-capacity E-Series Premium Air Coolers, each delivering 18,000 CMH. Spanning 2,000 sq.ft., this setup is built to handle large crowds and continuous usage, ensuring optimal comfort even during high footfall events. The result: efficient cooling without compromising on energy performance.

See the Full Video with Installation Images: Click Here

2. Private School – Vadodara, Gujarat
Creating a comfortable learning environment is crucial for maintaining student focus and promoting their well-being. At a private school in Vadodara, we installed a smart cooling system using four M Series Air Coolers — two units with 10,000 CFM and two with 4,000 CFM. This eco-efficient solution provides consistent airflow and delivers clean, cool air throughout classrooms, promoting a healthier and more productive educational environment.

See the Full Video with Installation Images: Click Here

3. Car Showroom – Jhansi, Uttar Pradesh
At the Ford showroom in Jhansi, we installed a sustainable and energy-efficient air cooling system tailored to maintain optimal indoor conditions. Designed to keep both customers and staff comfortable, this solution not only enhances the overall showroom experience but also supports energy conservation, a key factor in commercial HVAC planning.

See the Full Video with Installation Images: Click Here

Need a Custom HVAC Solution for Your Commercial Project?

Degree Day Pvt. Ltd. specializes in innovative, energy-efficient HVAC solutions tailored for commercial spaces.

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Contact Us to explore how we can help you build smarter, cooler, and greener.

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22May

Common Myths About Evaporative Cooling Systems

by Priyanka Gupta
evaporative cooler

Evaporative Cooling Systems have become a popular and energy-efficient alternative to traditional air conditioning. Despite their growing adoption, several myths still surround these Cooling systems, often causing confusion and hesitation among potential users. Our goal at Degree Day is to clarify myths and educate you on the true advantages of evaporative cooling. Here, we address the most widespread misconceptions regarding evaporative cooling systems and discuss their benefits as a very effective cooling option.

Myth 1: Electricity Use Is High in Evaporative Cooling Systems

One of the most energy-efficient cooling options is an evaporative cooling system, despite what many people think. Because they cool the air through evaporation rather than refrigeration, they use significantly less electricity than traditional air conditioners. This makes them an environmentally friendly option for both homes and businesses, as it results in reduced electricity costs and a smaller carbon footprint.

Read Now: Top Energy-Saving Tips for a More Efficient Commercial HVAC System

Myth 2: Evaporative Coolers Are Only for Small Spaces

Many people believe that evaporative coolers are only effective in small spaces. On the other hand, Degree Day provides a selection of evaporative cooling systems that can be tailored to fit residential spaces, factories, warehouses, expansive commercial spaces, and even outdoor areas. We design and build modular systems and prefabricated ducts to meet your unique cooling needs.

Myth 3: Evaporative coolers make a lot of noise

While modern evaporative coolers are built with sophisticated motor and fan technology that runs quietly, older models may have made more noise. The evaporative cooling units from Degree Day guarantee little noise disturbance, which makes them appropriate for offices, homes, and workspaces where silent operation is crucial.

Myth 4: It’s Hard to Maintain Evaporative Coolers

Evaporative cooling system maintenance is simple and easy. Only a clean water supply and routine cooling pad cleaning are needed. Degree Day offers solutions that are simple to maintain and have easily accessible parts, so maintenance won’t become a hassle. Maintaining your system properly also guarantees peak performance and prolongs its lifespan.

Read Now: Maximizing Efficiency: The Benefits of Regular Maintenance of HVAC Equipment

Myth 5: Evaporative Coolers Are Bad for Health

Some people are concerned that evaporative coolers can lead to respiratory issues or the spread of bacteria. In actuality, these systems can enhance indoor air quality by circulating fresh air and adding natural humidity. Microbial growth is avoided by using clean water and pads that are maintained on a regular basis.

Myth 6: Evaporative Coolers Require Constant Water Refilling

Even though evaporative coolers require water to function, contemporary models feature sizable reservoirs and water-saving features that lessen the need for frequent refills. Water refills are convenient and affordable thanks to our systems’ intelligent water management, which maximizes efficiency and minimizes waste.

Myth 7: Evaporative Coolers Are Only Useful During Summer

Although they excel in hot weather, evaporative cooling systems provide benefits beyond just summer. They improve ventilation and maintain air freshness year-round, making indoor environments more comfortable in transitional seasons. Additionally, their energy-efficient operation means you can use them more frequently without high operational costs.

Myth 8: Evaporative Cooling Systems Are Not Durable

Many people are hesitant because they are worried about durability. However, the premium materials used in Degree Day’s evaporative cooling systems ensure long-lasting performance, even in demanding industrial settings. These systems provide dependable cooling for many years when properly maintained, making them an affordable investment.

The adaptability of our systems is what makes us unique. One of Degree Day’s special features is that our GREENCON Evaporative Coolers can also run in exhaust mode. This improves the comfort and air quality of your space by efficiently removing smoke, unpleasant odors, and undesired scents.

Browse our range of evaporative cooling systems at degreeday.in to enjoy more efficient cooling than ever before.

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