Portable space heaters are small, electric resistance heating units. Regardless of the shape, size or type of electric heating element found in an electric space heater, virtually all power drawn is converted into heat. The cost of operating an electric heater depends on how much heat the unit is delivering.ortable space heaters are small, electric resistance heating units. Regardless of the shape, size or type of electric heating element found in an electric space heater, virtually all power drawn is converted into heat. The cost of operating an electric heater depends on how much heat the unit is delivering.
Flexible electronics, also known as flex circuits, is a technology for assembling electronic circuits by mounting electronic devices on flexible plastic substrates, such as polyimide, PEEK or transparent conductive polyester film.
A Concentric Systems is comprised of many components. Instead of explaining the components in their assembled order, I'll jump to the Hard or Flex Type connections. They dictate the construction of all the parts that make up a concentric diffuser system. Hard & Flex Duct Connections -- Two primary concentric diffuser systems dominate the market. They are referred to as Hard, or Flexible Duct systems.