Dimplex AC over door heaters provide multi-directional, powerful and effective heating above the entrance to shops, offices and almost any small doorway. When fitted above an open door, the warm airflow encourages trade by allowing doors and entrances to remain ‘open for business’ in many commercial applications. The AC3CE now features an electronic thermostat for temperature-based heating activation. The AC3CE also features a built-in 7 day timer which can be set up and activated via Bluetooth remote The AC range of over-door heaters are designed to provide a \"warm welcome\" over doorways. This product should not be specified for indoor space heating to reach and maintain a certain thermal comfort of human beings.