This automatic central heating controls are really only suitable for use with gas-fired or oil fired central heating systems. Solid fuel systems (coal or Coke) are very slow to change temperature, so precise control is difficult. Edgeware Plumbers can advise on temperature control.Timing programmer.A time the programmer can be installed to allow you to adjust the time when the central heating and hot water come on and go off. It might have either a rotary style clock timer mechanism, or a digital pushbutton display. Make sure that you position the programme well out of reach of any children in the home.Optimisers.Special program is called optimisers monitor the temperature in and around the house and then adjust the system for the most efficient pattern of temperatures.Room thermostats.A room thermostat is usually mounted at about head height in the living room. It will switch the central heating pump and boiler on and off to maintain the temperature in the room. Position it away from the coldest area of the room.Zone control valves.If your house can be clearly divided into zones that can be shut down at various times during the 24-hour period, you can install a zone control valve in the central heating circuit. The valve can then be set to suit the way in which your household uses the heating throughout the day.Thermostatic radiator valves.These valves are a good, easy to fit option that allows you to adjust the temperature of individual rooms. The easiest addition to make to your system is to put thermostatic radiator valves in your kitchen and bedroom is, so you can control the temperature in those rooms while the main room thermostat controls the boiler.Minimum requirements.A single room thermostat will not really be sufficient to control everything will stop for example, if someone leaves the kitchen door or an upstairs window open, the room thermostat in the living room will not know about it. It is best to fit thermostatic radiator valves as a minimum. Modern thermostatic valves are now so widely used that they are beginning to come down in price and are no longer expensive option that they once were.