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How To Make Infrared Cooling Paint (Electricity Free Air Conditioning)

NightHawkInLight · tutorial · Watch on YouTube

Materials scienceChemistryPower grid, heating & buildings

What it is

NightHawkInLight shows how to make ultra-white radiative paint that cools surfaces below ambient temperature without electricity. He walks through the research papers and the household-materials process.

Why Hacker News recommends it

HN points to it as a practical, well-researched DIY demonstration of passive radiative cooling.

  • 4 people recommended it
  • 4 different months
  • 1 strong recommendations
  • first 2022, last 2025

What HN commenters said

  1. “This YouTuber[0] does an excellent job recreating chemistry research from papers and improving on the techniques to be accomplished with household materials.”

    Recreates chemistry research from papers using household materials

    teeray, 2023-07 · Strong recommendation · in “American universities have an incentive to seem extortionate”

  2. “have been working on Infrared Cooling Paint for almost a year now and have been detailing how individuals can make it at home”

    Home-made infrared cooling paint process

    slimsag, 2023-04 · Recommendation · in “Energy-saving coating without pigment keeps the surface beneath cool”

  3. “there are a couple good videos about it from NightHawkInLight”

    Good video on passive radiative cooling paint

    energ8, 2025-06 · Recommendation · in “NASA's Voyager Found a 30k-50k Kelvin "Wall" at the Edge of Solar System”

  4. “It has pretty impressive performance.”

    DIY radiative cooling paint with impressive performance

    jcims, 2025-12 · Recommendation · in “Mechanical power generation using Earth's ambient radiation”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: radiative cooling, diy chemistry, paint, passive cooling, materials science

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