Temperature control

Thermostatic Radiator Valves

How to use Thermostatic Radiator Valves

Generally, one radiator should be left without a TRV and left permanently switched on, unless the boiler is fitted with a flow meter to detect when all the radiator valves are closed. This special radiator may be a bathroom towel rail (where the heat is always likely to be useful), or in the same room as the room thermostat. It is not a good idea to have a TRV on the radiator in the same room as the main thermostat, as if it turns the radiator off at a lower temperature, it can mislead the main thermostat into thinking that the house is cooler than it really is. When fitting TRVs, it should be noted that some are bi-directional (can be fitted on either end of a radiator), but many are best fitted at one end only (either flow or return) to reduce the chance of noise in the system.

Turning up a TRV will not usually warm up a room unless the radiator is cold, as most are basically designed to switch the heat on or off as the room temperature falls below or rises above a set temperature and are not fully modulating. Some TRVs are prone to sticking at one setting, if they're never adjusted. It's not a bad idea to turn them fully up or off a few times a year to reduce the chance of failure.

Different types of Thermostatic Radiator Valves

In the past few years a number of electronic TRVs (eTRVs) have appeared on the market. These typically allow temperatures to be set with greater precision than traditional TRVs, as well as being able to vary the temperature by time of day so that, for example, living rooms may be set to a higher temperature in the evenings, or bedrooms to a lower one by day. They have a motorized head that automatically turns the valve on or off when required; however this does mean that all such vales require a battery and are not completely silent in operation. Some eTRVs can be controlled wirelessly from an infra-red remote control or wirelessly from a personal computer and may have an override button that extends the higher temperature period by an hour, which can be useful in living rooms when people occasionally stay up late to watch a movie! Some models also allow remote thermostats within the room, so they are more indicative of the general room temperature than one in immediate proximity to the radiator. (Temperatures close to the bottom of a radiator sited under a window can often be significantly lower than the true room temperature.) eTRVs can also be sold in a tamper-proof version, typically for use in hotels or similar locations, where temperatures are wanted to be controlled centrally. It's not clear what savings will typically be achieved by using eTRVs but, as always, manufacturers' claims should be taken with a degree of caution when used in a real home or commercial building.

If poor temperature recognition is one of the main problems (for example if the radiator valve is situated behind a long curtain, under a draughty window or in an area prone to direct sunlight), then an alternative to an eTRV may be to install a remote sensor on a standard TRV head. This works by monitoring the room temperature via a 2 or 5 metre capillary connected to the sensing thermostat which can be mounted in an area more representative of the room.

Different types of Thermostatic Radiator Valves

This section does not apply to combination (combi) boilers, but only to systems with a separate hot water tank. First, it's most important that the hot water can be controlled by the programmer separately from the central heating. Some older systems only allow the heating to run when the hot water is on; this can be quite wasteful of fuel. Secondly, there should be a thermostat on the hot water tank - this is usually strapped to the outside fairly near the bottom. This controls the water temperature and should not normally need to be set higher than 60°.

Triangle Design For Powerful Cooling - Samsung

The Samsung Air Conditioner's unique triangular design improves its performance, circulating cool air faster, farther and wider around your home. Its Digital Inverter also provides significantly greater energy efficiency. And its Virus Doctor and Easy Filter eliminates dust, contaminants, allergens, bacteria and viruses - firstly using a filter and secondly with Virus Doctor.

The Samsung Air Conditioner has been designed from the ground up to be outstandingly efficient. Its uniquely triangular design has a wider inlet, so more air can be drawn in. The improved width and angle of its outlet, extra v-blades and a bigger fan also ensure that air is cooled and expelled faster, farther and wider. So refreshingly cool air reaches every corner of your room.

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Nest Thermostats

Your thermostat controls 60% of your energy biII. So shouldn't it help you save energy?

It lights u p when you walk into the room

Now the Nest Thermostat does something new when it sees you. It's called Farsight, and it lights up to show you the temperature that you've set or the time. You can even choose a digital or analogue clock face. Farsight is big and bright on the beautiful display - you can see it from across the room.

Control your hot water

Now, you can control year hot water tank with the Nest Thermostat. It comes with a hot water schedule - just adjust it from the Nest app. You can boost the heat so that you have extra hot water if you want it. And when you're away from home for a few days, you don't have to remember to turn off the hot water. The Nest Thermostat will do it for you.

See how much you've saved

Nest shows you how much energy you use every day in Energy History, and every month in your Home Report. So you can see when you use more energy, such as at the weekend or Monday nights, and how to use less.