Insulated rooms are a chamber that provides temperature controlled environment for conducting various manufacturing as well as research processes. These rooms maintain controlled environments by isolating the interior room temperature condition from the exterior space environment through refrigeration system and filter (HEPA or ULPA). Apart from desired temperature conditions, these insulated room units also eliminate or maintain a low level of environmental pollutants such as dust, airborne microbes, aerosol particles and chemical vapors. Owing to their multi functional nature, these rooms are in high demand at various industries such as food processing, pharmaceuticals, chemicals, scientific research, floriculture, agriculture etc. The walls, ceiling, doors, and even floor of these rooms are made of CFC free PUF insulated panels that provide low thermal conductivity and also optimal durability with less weight. These rooms are also available in the options of flush door and overlap door attachments.