What kind of boiler is the Glow Worm Ultimate3 25 - standard, combi or system?

The Glow Worm Ultimate3 25 may be worth considering if you are looking for a heat only boiler for your house or flat.

Heat only boilers are sometimes called standard boilers, regular boilers or conventional boilers but they are actually the same thing. For a heat only boiler, you'll need to find space for both a cold-water tank and an immersion hot water cylinder - most households choose the attic for the former and a landing cupboard or airing cupboard for the latter. The immersion cylinder is the part of the system that keeps your hot water warm.

You program your boiler to provide you with the hot water you want at certain times, such as when you want to have a bath or a shower. However, if you don't remember to program your boiler, you'll have to wait for it to heat up if the hot water has run out.

A regular boiler is the most suitable choice if you have a larger family or if there is more than one bathroom in your home - the more popular combi boilers do not work well in homes where there is high and often simultaneous demand for hot water.

Should I install a Glow Worm Ultimate3 25 heat only boiler in my house or apartment?

Whether this Glow worm Ultimate3 25 heat only boiler is right for where you live depends on its size or what its "output" level is. Size does not mean its physical dimensions, however - it means how powerful it is.

The output of a boiler is measured in kilowatts and indicates how much energy it can use to heat the water needed for your radiators, taps and showers. The greater the output, the more water it can heat.

A boiler whose output is too high will give you hot water and warm radiators but also higher gas bills, whereas a boiler whose output is too low will result in cheaper gas bills but the water might not always be as hot as you want it to be.

The output of the Glow Worm Ultimate3 25 heat only is 25 kW, so which types of property would this model be appropriate for?

An experienced PlumbProud Gas Safe boiler installer would recommend that this Glow worm Ultimate3 25 heat only boiler is appropriate for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

Glow Worm Ultimate3 25 - size in millimetres

The Glow Worm Ultimate3 25 boiler measures TBC mm [H] x TBC mm [W] x TBC mm [D] in size.

Is the Glow Worm Ultimate3 25 condensing or non-condensing?

The Glow Worm Ultimate3 25 is a condensing boiler – we recommend to all clients that they choose the very latest condensing boilers because their efficiency continues to improve year after year.

Condensing boilers recycle heat from both water vapour condensation and flue exhaust gases via a secondary heat exchanger. With this heat, it performs other tasks like warming up colder water returning from your radiator without having to use more gas.

You will save money on your gas bills every year by choosing a condensing boiler as well as benefitting the environment.

Is the Glow Worm Ultimate3 25 heat only rated as environmentally friendly?

More and more homeowners are aware of the importance of how we heat our homes and its impact on climate change and other environmental issues.

We generate 14% of UK greenhouse gas emissions through centrally heating our domestic properties. Gas boilers are mainly responsible for harmful nitrogen dioxide emissions in larger British cities.

If you decide to install a Glow Worm Ultimate3 25 heat only in your home, will you be helping the environment with your choice? Let’s have a look at the figures.

All boilers manufactured in the UK from April 2018 must achieve a SEDBUK “A” grade and an energy efficiency rating of 92% or above. Before that, the minimum was 88% - efficiency ratings of 88% and 89% were scored a “B” and 90%+ an "A".

A boiler's energy efficiency rating describes how much energy it uses and wastes during its standard operation.

The energy efficiency of the Glow Worm Ultimate3 25 was rated at 89.6% with a SEDBUK grading of "B".

How many years does the warranty period cover on a Glow Worm Ultimate3 25 boiler?

The Glow Worm Ultimate3 25 boiler is covered by a parts and labour warranty of 5 years.