IIT Guwahati develops bricks that reduce indoor temperatures and energy use

March 27, 2026 /Posted byPrajwal EW / 0

Indian Institute of Technology Guwahati has developed energy-efficient bricks designed to reduce indoor temperatures and lower reliance on air conditioning.

The research, published in the Journal of Energy Storage, was led by Pankaj Kalita and his team. The bricks incorporate phase change materials (PCMs), which absorb heat during the day and release it later, helping maintain stable indoor temperatures.

The team identified OM35 as the most suitable PCM for hot climates. To prevent leakage during melting, the material was combined with biochar, improving both stability and heat transfer.

According to the researchers, the biocomposite-filled autoclaved aerated concrete (AAC) bricks maintain structural stability and mechanical strength in hot and humid conditions. Tests indicate the bricks can reduce indoor temperatures by around 3°C and cut cooling energy demand by 10–20 per cent.

The bricks are currently priced between Rs.115 and Rs.130, with costs expected to decline at scale. The team indicated that commercialisation may follow. The development is expected to contribute to reducing energy use in buildings.

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IIT Guwahati develops bricks that reduce indoor temperatures and energy use

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