A mains electricity (AC-powered) unit designed to provide an enclosed controlled environment to maintain appropriate temperature and humidity levels mainly for premature infants and other newborns who cannot effectively regulate their body temperature. It typically consists of a clear removable plastic hood with a mattress. It typically includes a means to warm the infant such as providing heated air (either by natural flow or forced) or through a warm water mattress; temperature controls that work automatically either by measuring the air temperature or through a temperature sensor attached to the infant skin; and humidity controls. The device is intended to remain in a hospital ward.