Central Heating Thermostats
A programmable room thermostat combines the time-clock function within the thermostat whilst offering additional features.
The main additional feature of a programmable central heating thermostat
is the ability to set different temperatures at different times of the day – known as comfort levels. As the temperature set-point can be made to match the lifestyle of the occupant, a programmable digital thermostat gives far more flexibility and greater energy saving. In addition, programmable room thermostats also serve as a frost stat.
A programmable room thermostat is both a programmer and a room thermostat. A programmer allows you to set 'On' and 'Off' time periods to suit your own lifestyle. A room thermostat works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached.
So, a programmable room thermostat lets you choose what times you want the heating to be on, and what temperature it should reach while it is on. It will allow you to select different temperatures in your home at different times of the day to meet your particular needs.
Turning a programmable room thermostats to a higher setting will not make the room heat up any faster. How quickly the room heats up depends on the design of the heating system, for example, the size of boiler and radiators. Neither does the setting affect how quickly the room cools down. Turning a programmable room thermostat to a lower setting will result in the room being controlled at a lower temperature, and saves energy.
The way to set and use your programmable thermostat is to find the lowest temperature settings that you are comfortable with at the different times you have chosen, and then leave it alone to do its job. The best way to do this is to set low temperatures first, say 18AC, and then turn them up by one degree each day until you are comfortable with the temperatures. You won't have to adjust the thermostat further. Any adjustments above these settings will waste energy and cost you more money.
If your heating system is a boiler with radiators, there will usually be only one central heating programmable room thermostats to control the whole house. But you can have different temperatures in individual rooms by installing thermostatic radiator valves on individual radiators.
Programmable room thermostat need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the thermostat from working properly.
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