What can be done to increase energy efficiency?

Boiler upgrade

Replacing an old G-rated gas boiler which has no controls with a new condensing model, including a programmer, could trim up to £340 a year from the gas bill of a typical home - well worth considering, particularly if your boiler is behaving badly.

Find out more about new boilers and boiler maintenance >

The right heating controls

It may seem obvious but turning down the heating in your home (even by just 1°c) can save around £85 to £90 a year on the average bill, according to the Energy Saving Trust. The right heating controls will allow you to keep your home at a comfortable temperature without wasting fuel or heat.

If you have a central heating system (whether its gas, LPG or oil-fired) your full set of controls should ideally include a boiler thermostat, a timer or programmer, a room thermostat and thermostatic radiator valves. That way you have control over every variable and can easily create the optimum home climate.

Room thermostats

If you are opting for certain Worcester Bosch boilers we recommend installing a Worcester Bosch Wave controller to effectively maintain the heat in your home.  With any other boiler or system we would recommend a Nest Learning Thermostat

Smart Heating Systems

Giving you total control over your home climate, smart heating systems allow you to benefit from controlling your heating whilst you're away from home. Ideal for the environmentally conscious and those looking to reduce household energy bills, smart heating systems such as the Nest Learning Thermostat and Worcester Wave allow you to micromanage your home heating so it's always running as economically and efficiently as possible.

Find out more about Worcester Wave and Nest Smart Heating >

Thermostatic Radiator Valves  (TRVs)

Rather than controlling the boiler, Thermostatic Radiator Valves reduce the flow of water through the radiator when the surrounding air temperature hits a certain setting. Set them to the temperature level you want for the room; a lower setting uses less energy will consequently save you money.
Turning a TRV to a higher setting will not make the room heat up any faster – that will depends on the boiler size and setting and the radiator size. TRV's are particularly useful for bedrooms where room temperatures are usually lower, rooms that are not in use, and kitchens where additional heat sources such as ovens and hobs means that the room could get too hot if the radiator was left on full power.

You could save £80 to £165 a year in a typical home by installing a room thermostat and thermostatic radiator valves, according to the Energy Saving Trust.


Larger radiators are more efficient as they can run at a lower temperature and the more panels and convector fins the radiator has, the more heat the radiator will give off. The type of metal the radiator is made out of will determine how quickly it heats up too– so an aluminium radiator will heat up a lot quicker than steel (though this should not be an issue if you have a thermostat, as it will keep the room at a constant temperature). If your radiators are ancient, it's worth considering that modern panel radiators use less water, less energy and react more quickly to thermal heat changes.

Underfloor Heating

The average under floor heating system will use between 10-30% less energy than conventional radiators because a much lower flow temperature is required to heat a room.

A radiator has a much smaller surface area than an entire floor and therefore has to produce a lot more heat before the benefits will be felt across the room. Underfloor heating heats the room from the bottom up and no heat is wasted whereas some of the heat generated from radiators is lost in the ceiling as the heat rises.

Find out more about underfloor heating >

Why choose Roost to help improve your energy efficiency?

We are a team of highly skilled heating engineers but our outlook is holistic. We understand the importance of balancing budgets, considering lifestyle and practicality and also keeping sustainability and ways to save energy in mind throughout. 

It is part of our ethos to recommend energy saving solutions, identify areas for improvement where appropriate and come up with ideas to optimise your heating which you may not have thought of but there's never any obligation or pressure for you to make changes. If you're planning a new build or extension and you'd like advice, or you just think your boiler may be on its last legs and you need a recommendation, why not get in touch?