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High Efficiency Boilers

Boiler Technology in Recent Years

Over the last couple of decades boilers have evolved improving their performance, their efficiency, their output and their physical design and looks. New boilers are substantially more efficient, offer better value and are simpler to install and service.

The most important advance has been the introduction of the condensing High Efficiency boiler, which in simple terms recover a substantial percentage of the waste heat that is normally expelled into the atmosphere from the flue of a standard (non-condensing) boiler. By using an extra-large heat exchanger (or two heat exchangers in other cases) within the boiler, the system maximises heat transfer from the burner while recovering useful heat that would normally be lost with the flue gases

Boilers account for around 60% of all domestic CO2 emissions according to the Energy Saving Trust.

So it's no surprise that one of the most effective ways of reducing your energy bills is to replace an old or inefficient boiler, generally those over 15 years old. All modern boiler systems are designed to be energy efficient and need less fuel to run with the most efficient condensing boilers using 30-40% less.

Installing a new boiler is an investment as the savings you could make through lower heating bills can help you recover the cost within 3-5 years and the savings would continue long after. Even so, there are grants available from SEAI to help you with the cost of purchase and installation. See here for grants.

We highly recommend with any boiler change a full power flush of the heating system to protect the new appliance.

Heating Controls

When it comes down to heating your home efficiently just a new condensing boiler alone won't be enough. The right kind of controls are essential to keep fuel usage to a minimum. A saving of 17% could be made with correct controls and coupled with your new condensing boiler could see €300 per year wiped off your heating bill.

A Typical system should have...

A time programmer,

A room thermostat.

Plus if you have a cylinder...

A cylinder thermostat

Thermostatic radiator valves (TVR's)

Further savings can be made by using room thermostats with chrono-proportional capabilities. These stats reduce fuel consumption by 10% and therefore carbon emissions by the same margin. As the cost in fuel inevitably rises, it makes sense to make a small investment which can make a big difference.

 

Cylinder thermostat;

A cylinder thermostat switches on and off the heat supply from the boiler to the hot-water cylinder. It works by sensing the temperature of the water inside the cylinder, switching on the water heating when the temperature falls below the thermostat setting, and switching it off once this set temperature has been reached.

 

TRVs

If your heating system is a boiler with radiators, there will usually be only one room thermostat to control the whole house. But you can have different temperatures in individual rooms by installing Thermostatic Radiator Valves (TRVs) on individual radiators

TRVs sense the air temperature around them and regulate the flow of water through the radiator which they are fitted to.

Room Stat; 

A room thermostat simply switches the heating system on and off as necessary. It 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.

Programmer;

Programmers allow you to set ‘On’ and ‘Off’ time periods. Some models switch the central heating and domestic hot water on and off at the same time, (these no longer comply with regulations as they can waste energy) while others allow the domestic hot water and heating to come on and go off at different times. Set the ‘On’ and ‘Off’ time periods to suit your own lifestyle. On some programmers you must also set whether you want the heating and hot water to run continuously, run under the chosen ‘On’ and ‘Off’ heating periods, or be permanently off

Motorised valves;

Motorised valves are used in conjunction with stats and programmers to physically shut off or on the flow of water to a certain section of he heating system when the need arises

Valves generally come in two parts: a plumbing part and a removable motorized head. On some early models it is not possible to replace the head independently from the rest, and the system has to drained down to replace them. The electrical part is a _relatively_ unreliable component, hence the desirability of a 'replaceable head'

If you would like to upgrade your controls or simply add TRVs or a cylinder stat we can advise you on this. We can also test existing controls if their correct operation is i doubt and replace if needs be.


Call us for more information on 087 0522570

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