3D printer enclosure temperature controller

Arduino based temperature monitor and controller for our 3D printer enclosure. The aim is to maintain 30 degrees C inside the enclosure to avoid shrinkage problems with printing ABS. It is not possible to have a higher temperature as our printer's electronics is not external to the enclosure. The controller monitors and displays temperature both inside and outside the enclosure and controls a flap to allow hot air to escape once the inside temperature is above 30C. To avoid ABS fumes you can monitor the temperatures remotely via wifi.