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Republic Polytechnic
Agri-Food Innovation

Low-E (Low Energy) HVAC System for Indoor Farming and Mini Greenhouses

A unique Low-Energy HVAC system for farming. It can cool, heat, dehumidify, and ventilate any enclosed space using up to 100% outdoor air exchange.

Lettuce growing in a glass case connects to a ventilation system with a laptop and testing equipment.

Technology overview

The Heating, Ventilation and Air Conditioning (HVAC) system can account for over 50% of the total energy usage in an indoor agriculture farm. RP has developed a unique Low-E HVAC system for farming that can cool, heat, dehumidify, and ventilate enclosed spaces using up to 100% outdoor air exchange. With the Low-E HVAC system, operating costs are measured to be 35% to 37% lower than conventional HVAC system*

*Based on the RP indoor grow room’s set-up (space volume of 8 m3)

Technology features

  • Cooling, dehumidification, and fresh air ventilation processes are combined in one compact assembly

  • Up to 100% outdoor air exchange capability

  • Able to maintain at 40% to 60% drying conditions with reduced energy consumption.

  • Uses CFD testing method to ensure uniformity of air distribution, eliminating the need for a Mechanical Ventilation (MV) fan

  • Modular-based technology

Potential applications

  • Indoor farming

  • Outdoor enclosed farming

  • Grow rooms for research

  • Mini greenhouses

Benefits

  • Space-saving with three processes combined in one assembly, reducing the need for additional equipment

  • Achieve the same drying conditions with lower power consumption compared to using conventional air-conditioning systems

  • Maintains stable and naturally balanced levels of CO2 and O2 for plant growth and maturity

  • Flexible to be used in indoor and outdoor growing.

  • Energy-saving and cost-effective

Commercialisation

  • This technology is available for licensing and technology transfer.

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