Whalesbook
The surge in performance for India's data center cooling companies is driven by a critical shift: the intensive thermal demands of artificial intelligence. As AI workloads increasingly shape data center design, advanced cooling solutions have become a primary driver of infrastructure and efficiency, reshaping the competitive landscape and pushing rapid innovation.
The AI Thermals Race
The demand for AI is pushing India's data center capacity to expand from 1.5 GW to an estimated 3-3.5 GW in the next four to five years, nearly doubling its current infrastructure. This growth is expected to attract $2-2.5 billion in investments specifically for cooling and thermal management solutions. Further projections indicate India's data center capacity could reach 4 GW by 2030, requiring an estimated Rs 1.5 lakh crore investment. The market for data center cooling in India is anticipated to grow at a compound annual growth rate (CAGR) of about 26.3% from 2026 to 2035, potentially reaching over $12 billion.
KRN Heat Exchanger: Capacity, Contracts, and Valuation
KRN Heat Exchanger supplies critical cooling components like chillers and dry air coolers to major HVAC equipment suppliers in India, whose systems are used by global manufacturers such as Schneider Electric and Climaventa. The company recently emerged as the lowest bidder for a prospective major client's process involving over 90 SKUs, a significant step towards becoming a new vendor. This success aids KRN's goal of capturing 50% of India's data center heat exchanger market, boosting its segment revenue contribution to 15% in Q3FY26 from 7% the previous year. KRN is also undertaking a substantial 6x capacity expansion.
KRN has seen strong recent financial performance, with its stock gaining about 73.58% in the past year. As of April 2026, its market capitalization was approximately ₹7,755 crore, with a stock price near ₹1,309.35. Its valuation metrics are high, including P/E ratios of 121.13 and 117.71. Despite the premium valuation, two analysts rate KRN as a 'Strong Buy'. The company reported an ROE of 20.8% and net profit growth of 65% year-over-year in Q3 FY26.
Voltas: Diversification and MEP Synergies
Voltas, a Tata Group company, is leveraging its extensive Mechanical, Electrical, and Plumbing (MEP) vertical to enter the data center segment, viewing them as attractive, fast-track projects with quick profitability. Through a new technology partner, Voltas has enhanced its offerings with energy-efficient screw and centrifugal chillers, including oil-free variants, addressing data center operators' high energy expenditure concerns. By combining chiller equipment sales with MEP services, Voltas acts as a comprehensive 'single-source' vendor, gaining an edge in the district cooling market traditionally dominated by American firms.
Voltas has seen significant market capitalization growth, up 11.77% in one year to approximately ₹50,000 crore as of April 2026, with its stock trading around ₹1,505.35. The company's one-year price total return is 100.9%. It reported an ROE of 13.5% and a TTM P/E ratio of 89.92, indicating a considerable valuation multiple.
Blue Star: High-Margin Liquid Cooling Push
Blue Star is expanding into the data center sector by focusing on high-margin liquid cooling solutions. The company sees data centers, factories, and buildings as lucrative segments with superior profitability compared to traditional infrastructure projects. Blue Star is developing in-house liquid-cooling models, expected within 12 months, and seeking international partnerships for advanced solutions. It positions itself as a market leader in MEP and EPC execution for data centers and is building expertise in semiconductor air conditioning.
Blue Star demonstrates strong return ratios, with RoCE of 47.5% and ROE of 26.2%. Its market capitalization is about ₹38,890 crore, with its stock trading around ₹1,895.85 as of April 2026. The company's one-year price total return was 7.4%. While its valuation is a premium to historical and industry averages, its return metrics are the strongest among the three companies detailed.
The Valuation Conundrum
All three companies are trading at significant premiums. KRN Heat Exchanger's P/E ratio is exceptionally high, over 115x, and its market cap of ₹7,755 crore suggests a substantial valuation based on current earnings. Voltas, with a P/E around 82-99x, also reflects high market expectations. Blue Star, despite superior return ratios like a 47.5% RoCE, also trades at a premium. This sector-wide elevated valuation suggests the market has already factored in substantial future growth and technological adoption.
Structural Weaknesses & The Bear Case
Despite the AI-driven data center boom, several risks require attention. KRN's ambitious market share targets and capacity expansion depend on successful execution and sustained demand from its new major client. Voltas' reliance on its MEP vertical for data center growth, while synergistic, links its success to broader construction and infrastructure cycles. Blue Star's strategic shift to high-margin liquid cooling involves developing new technologies and partnerships, carrying inherent execution and commercialization risks. The capital intensity of expanding cooling solutions for AI demands could strain balance sheets if demand unexpectedly moderates. Current elevated P/E ratios across all three companies, especially KRN, indicate a significant risk of correction if growth projections falter or competition intensifies. The sector also faces risks from shifts in global semiconductor supply chains and hyperscaler investment strategies.
Future Outlook
The trend of increasing AI workload adoption and the resulting demand for advanced cooling infrastructure in India remains strong. With projected capacity growth and ongoing investment in data center expansion, companies that can deliver innovative and scalable thermal management solutions are well-positioned. This sector's expansion is expected to continue, supported by digitalization trends and government initiatives promoting domestic data infrastructure.