SíAir Version
The first climate-neutral cooling system with zero electricity
SíAir is a fully passive cooling and climate system based on natural temperature gradients and a patented cistern technology.
Instead of compressors, fans or chemical refrigerants, SíAir uses only water, earth air and evaporative physics - a principle known for centuries, now modernized, stabilized and scalable for the first time.
The system is modular, low-maintenance and operates 24/7 with no external energy input.
This makes SíAir ideal for real estate, agriculture, off-grid applications, hot climates and regions with unstable or expensive electricity.
SíAir reduces indoor temperatures by 8–16°C, stabilizes food and crop storage, protects buildings from overheating and enables fully autonomous cooling where electricity is unreliable or cost-intensive.
A sustainable solution that reduces operating costs immediately and creates long-term energy independence.
How SíAir Works
How the SíAir System Works
SíAir uses an underground water or climate cistern as a natural cold reservoir.
Through a precisely engineered airflow system, warm outside air is passed over water surfaces and earth-cooled zones - lowering its temperature before entering the building.
The entire process is fully passive:
No pumps. No electricity. No moving parts.
The cistern functions as a seasonal thermal buffer.
During the day, heat is absorbed; at night, the system naturally regenerates.
Combined with wall modules, natural-draft shafts or earth ducts, SíAir forms a complete cooling network that operates continuously - even at 40°C or higher outdoor temperatures.
SíAir can be built into new structures or retrofitted into existing buildings and operates independently of grid stability or energy prices.
Ideal for regions with high cooling demand or limited infrastructure.
Applications
Application Areas of SíAir
SíAir provides cooling solutions across residential, commercial and agricultural sectors:
• Residential Homes & Vacation Properties
Passive cooling without electricity, lower operating costs and comfortable indoor temperatures even in peak summer.
• Agriculture & Storage Facilities
Cold storage for vegetables, fruit, wine, seeds and warehouse environments.
• Hotels & Hospitality
Autonomous cooling for kitchens, storage rooms and guest areas — silent and reliable.
• Off-Grid & Emergency Supply
Operates without any grid connection; ideal for crisis resilience, desert regions, remote fincas and modern preparedness concepts.
• Municipal & Industrial Use
Passive cooling for schools, production halls, modular buildings or refugee camps.