Business Insider – A new R21 thermal insulation product that costs $100 and can be used in new buildings for the first time.
R21 is the acronym for a “resilient material.”
It’s a material that absorbs heat from an environment and keeps it there.
It’s more expensive than ordinary insulation but more durable than typical fabrics, making it ideal for the modern home.
It absorbs the energy it’s exposed to, releasing heat from a point of contact to a distance of 30 meters.