India is one of the most challenging environments in the world for air conditioning. Summer temperatures regularly cross 45°C and can reach 50°C in several parts of the country. At the same time, consumers expect powerful cooling, low electricity bills and reliable long-term performance.
Building an air conditioner that can balance all three is not a straightforward engineering problem. It requires a deep understanding of thermodynamics, heat transfer, system design and how cooling systems perform under extreme real-world conditions.
Before launching its first air conditioner, Optimist spent more than 18 months working with IIT Delhi through the Foundation for Innovation and Technology Transfer (FITT). The collaboration focused on understanding and solving some of the toughest cooling challenges faced by Indian consumers.
Here’s a closer look at what the partnership involved and why it continues to play an important role in Optimist’s engineering journey.
India presents one of the toughest cooling challenges in the world. In many cities, summer temperatures regularly cross 45°C and can reach 50°C. At the same time, consumers expect low electricity bills, reliable performance and affordable ownership costs.
When Optimist started building its air conditioner, the team wanted to understand these challenges from first principles rather than simply adapting an existing design. IIT Delhi brought deep expertise in thermal systems, heat transfer and HVAC engineering, making it a natural partner for solving these problems.
The collaboration has been active for more than 18 months through FITT (Foundation for Innovation and Technology Transfer), IIT Delhi.
Optimist has worked closely with Prof. Anurag Goyal from the Department of Mechanical Engineering and members of his research group. Several students have also contributed to product development and engineering simulations.
The collaboration covered multiple areas of engineering and product development, including:
· Development of HVAC simulation tools
· Creation of digital twins
· Heat exchanger design
· System validation under high ambient temperature conditions
These efforts helped Optimist better understand how cooling systems behave under extreme Indian summer conditions, evaluate design alternatives more efficiently and validate system performance before large-scale deployment. The objective was to build a cooling system engineered specifically for Indian conditions rather than adapting assumptions from other markets.
Most consumers only notice an air conditioner when temperatures become extremely high.
As outdoor temperatures rise, many cooling systems lose capacity and become less efficient. Designing for 50°C conditions helps ensure that cooling performance remains stable even during peak summer heat.
This is particularly important in cities such as Delhi, Jaipur, Nagpur and parts of Rajasthan where extreme temperatures are becoming increasingly common.
One of the key outcomes of the collaboration is that Optimist’s air conditioning platform was validated in pilot testing to deliver the required cooling capacity at ambient temperatures up to 50°C while maintaining high energy efficiency.
The engineering work carried out with IIT Delhi formed an important foundation for the product that later entered commercial production.
According to Prof. Anurag Goyal:
“India’s climate places unique demands on cooling systems, particularly at higher ambient temperatures. The work with Optimist has involved rigorous simulation and thermal analyses, leading to the current pilot of the ultra-high-efficiency air conditioner for the Indian market.”
Optimist views the engagement as a long-term engineering partnership.
As cooling demand continues to grow across India, the company intends to continue investing in research, thermal engineering and product innovation to improve efficiency and performance for Indian consumers.
For consumers, the collaboration represents a simple idea:
Instead of starting with a product and adapting it for India, Optimist started with India’s climate and designed the product around it.
The goal is to build cooling systems that remain efficient, reliable and effective even in some of the hottest conditions found anywhere in the world
No spam. Just the latest releases and tips, interesting articles, and exclusive interviews in your inbox every week.
Get in touch with your thoughts!
