Passive daytime radiative cooling / Hill Country, TX

Reject the heat.
Keep your cool.

PDRC-engineered surfaces that reflect solar energy and emit infrared directly to outer space — lowering surface temperatures below ambient without consuming a single watt.

95% solar reflectance
−4°C below ambient
0W power consumed
637m² per person to 1% coverage

The sky is a
cold sink. Use it.

The 8–13 μm atmospheric window is a spectral gap through which long-wave infrared passes directly to space — bypassing the atmosphere entirely. PDRC materials exploit this window, emitting heat to a 3K cold sink 24 hours a day.

Standard dark roof — solar absorbed
95%
Standard roof — reflected
5%
PDRC surface — solar reflected
95%+
PDRC — IR emitted through atm. window
8–13μm
Net surface cooling below air temp
−2 to −8°C

Products &
solutions

Seven problems.
One technology stack.

View all problems we solve →

Ground Truth Network

Before PDRC can be deployed intelligently, the thermal field must be mapped. GTN sensor stations characterize microclimate conditions — informing placement, measuring impact, closing the feedback loop.

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