Does passive radiative cooling depend more on policy support than technical progress?

The real bottleneck is manufacturing, not incentives

The central challenge for passive radiative cooling is not a lack of government support, but the difficulty of making materials that work reliably in the real world at a low cost. A 2026 review of the entire field concluded that 'record optical performance under idealized conditions has not consistently translated into reliable real-world energy savings' because of 'limited durability, inadequate standardization, and barriers to scalable manufacturing' [5]. In other words, even the best lab results don't automatically become useful products — and that's a technical problem, not a policy one.

Several papers directly demonstrate that solving the manufacturing problem is what unlocks practical use. A 2021 metafabric achieved 92.4% solar reflectivity and 94.5% infrared emissivity through a 'scalable industrial textile manufacturing route' that also gave it mechanical strength, waterproofness, and breathability — all at a cost that the authors called 'cost-effective' [6]. Similarly, a 2026 wearable textile was made via a 'scalable, one-step, and additive-free wet-spinning technique' that turned a common polymer into a cooling fabric [2]. These examples show that when the technical hurdle of scalable production is cleared, the technology can move toward real adoption without waiting for new policies.

Technical progress solves real-world failures that policy cannot

Even the best-designed radiative coolers fail under common conditions like humidity, clouds, or dust — and only technical innovation, not policy, has fixed these weaknesses. A 2022 study showed that conventional high-infrared-emissive coolers 'do not function satisfactorily under atmospheric counter radiation (cloudy, humid, reduced sky access conditions)' [4]. The same team then designed a dual-mode photonic structure that outperformed a standard cooler by 80% in cooling power under those exact conditions, and kept surfaces 8°C cooler under cloudy skies [4]. That's a purely technical fix.

Durability is another area where technical progress is essential. A 2023 microporous glass coating maintained its cooling performance even after exposure to water, ultraviolet radiation, soiling, and high temperatures — and worked in 80% humidity, achieving a 3.5°C temperature drop at midday [1]. The authors explicitly note that unlike polymer-based coolers, this hard material is 'more robust to long-term weathering,' which is critical for outdoor building applications. No amount of policy support can make a material that degrades in sunlight or rain into a viable product.

Policy plays a supporting role, but is not the primary driver

While policy support — such as building energy codes or subsidies for cool roofs — can help accelerate adoption, the evidence here shows that it is not what determines whether PRC works or gets used. The 2026 review notes that 'techno-economic viability' and 'evaluation standards' are among the key bottlenecks [5], which are areas where policy could help (e.g., by funding standardization or demonstration projects). But the same review lists 'climatic adaptability, long-term stability' and scalable manufacturing as the primary barriers — all technical challenges.

Even in applications where policy might seem most relevant, like building cooling, the papers emphasize technical performance first. A 2023 radiative cooling glass was projected to reduce building cooling energy by up to 60% [1], but that potential depends entirely on the material's ability to maintain high solar reflectance and infrared emission over years of outdoor exposure. A 2026 analysis of near-field thermophotovoltaics with radiative cooling achieved a 109.3% improvement in power density over conventional designs — again, a purely technical advance [3]. None of the seven papers cite policy as a decisive factor in their results.

About These Sources

This answer is built on 6 peer-reviewed studies — published from 2021 to 2026, 3 from 2024 or later, 6 in Q1 journals, collectively cited 1,463 times — selected as the most relevant from 7 studies that passed quality screening, drawn from 59 papers retrieved from a database of over 500 million.

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