RuKart's Subjee Cooler & ZEN are green, recurring, cost-free technologies with dual benefits: natural ripening & Storage. It is based on the patented “Enhanced Evaporative Cooling” principle developed by RuKart. Its innovative membrane-based cooling system requires no utility/power & only 3- 14 litres of Water/Day.
A full-size household refrigerator that maintains 17.7–22°C at no load & 10-21°C less than ambient without a compressor, refrigerant, or any extra heat pumping into the environment — and with absolutely no power input. Powered entirely by passive thermodynamic principles — radiative cooling, innovative membrane systems, and natural convection - & works across all climatic zones, everywhere.
Next-generation cooling technology powered by patented passive systems with dual benefits of Storage + Natural Ripening. Cooling your perishable produce or naturally ripening your fruits without heating the planet.

Yet across South Asia, Africa, and Southeast Asia — millions of vendors, grocery owners, and small farmers are paying a premium every month for a machine that is quietly destroying their margins.
This is not a small problem.
Post-harvest losses in the Global South run at 30–40% of all fresh produce. A significant chunk of that loss happens not in transit, not in the field — but in the wrong kind of cold storage.
Not freezing. Not dry cold.
It needs cool, humid air — the kind that mimics the natural environment where the produce grew. That's exactly what RuKart's patented "Enhanced" evaporative cooling delivers.
No Power. No refrigerant gas. No maintenance cost.
No ₹10,000 monthly electricity bill + monthly maintenance cost.
Just nature. Just results. 🌿

RuKart models do not need any external power or utility. It needs only 3-14 litres of clean, potable water/day during storage & no water during the ripening process.

Subjee Cooler (Pink) preserves natural aroma, colour, freshness, nutrition, stiffness/tenacity & taste as good as freshly harvested compared to traditional storage technologies (Blue).

The stored produce does not experience thermal stress like in a cold storage/Refrigerator. Thus, no need to maintain an end-to-end cold chain. Enjoy the farm-level freshness at home.

RuKart's Subjee Coolers & ZEN have been installed in Cherrapunji & Mawsynram (the 1st & 2nd wettest places on the Planet), in the Snow-Capped Himalaya & in coastal regions.

RuKart saves 8.3X & 137X CO2e compared to equivalent capacity Solar & Electricity powered storage technology, respectively.

RuKart - Subjee Cooler or ZEN - provides you an opportunity to store multiple commodities like Flowers, Fruits, Mushroom & Vegetables together while maintaining their respective freshness.

With advanced membrane technology, 80% of the applied water can be re-used after 1 month of regular operation. Thus, bringing the total water required/year to 220 litres for 165L Model & 1,050 litres for 100 kg model.

17.7-22°C is the optimal temperature maintained in the Subjee Cooler at No or Low load. This provides an ideal environment for maintaining "the Life Force" in perishables.
Freshly believes fruits & vegetables are not just food—they carry Aroma, Nutrition & Taste, the #Prana, i.e., life force that nourishes us.
Unlike Vapor Compression powered conventional refrigeration that relies on electricity or solar & strips away natural vitality, RuKart's solution is designed to:
✨ Maintain natural Aroma & Freshness
✨ Preserve nutrients & vitality
✨ Work in harmony with the Nature - no Power needed.
Listen to Somesh Ji, the CEO, Sahaja FPC. Sahaja FPC is one of the largest FPCs from India.
There is a supply chain problem that no spreadsheet captures -& it's costing farmers their health.
Vapour compression cooling devices in our homes emit heat, contributing to global warming and climate change, creating a vicious cycle we must break. RuKart's mission is to provide eco-friendly refrigeration solutions that enhance your quality of life while promoting heat wave mitigation through innovative green cooling methods. We are committed to sustainable cooling technology and Nature based green cooling, ensuring a better tomorrow for our planet with our refrigerant-free cooling systems.
Fridge/Refrigerator was designed for meat, dairy & processed food. Not for fresh produce.
3rd Party independent impact study report.
AEEE conducted a study for about 1 year & documented the efficacy of Subjee Coolers at Sahaja Samruddha Organic FPC in Bengaluru.
ITC independent study about the efficacy of Subjee Cooler
ITC Guntur research team conducted experiments at a retailer's outlet in Chutugunta Rythu Bazaar, Guntur, Andhra Pradesh.







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