Heat Exchange Institute

April 6, 2021—CLEVELAND—The Heat Exchange Institute (HEI) will now offer the sale of all nine HEI standards on their own updated (2020) website. Each standard is available for purchase at https://www.heatexchange.org/products/hei-standards. No login or membership is required to purchase materials. Users from anywhere in the world can simply add the desired standard(s) to the cart […]