For the basics in garden room control the Green Air 24-CT-1 might be just what you need. This handy item incorporates two of the more common requirements of a small enclosure. 

The 24-CT-1 offers a timed outlet and a thermostatically controlled outlet. The thermostat is used to operate cooling equipment and is sensitive to temperature rise. The internal sensors will allow a 7 degree comfort zone.

To set the timer, turn the dial to current time of day. The dial face is divided into 15 minute increments. Rotation is clockwise only.

This unit is ideal for operating lighting, CO2 equipment, watering systems, fans etc. and provides an economical solution for many greenhouse control needs.