Is the Glow Worm Ultimate3 25 boiler a combi, regular or a system boiler?

Suitable for a house or a flat, the Glow Worm Ultimate3 25 system boiler is worth considering if you want a system boiler.

System boilers share many similarities with more traditional heat only boilers, like the need to program the times you want them to provide you with heat and hot water - just use the control panel to do this.

Where they differ from regular boilers is that they do not require a separate cold-water tank - everything is done within the hot water cylinder, which contains built-in circulating pumps. This makes them easier to install as there is one less component to fit and makes them more suitable for properties with no loft space, smaller lofts or for homeowners who are considering converting their loft.

As long as you have programmed your system boiler in advance, you will have the hot water you need ready for whenever you want to use it. Once the water is heated, it will remain available, warm, inside the tank until it’s all used up. It will then draw more water from the mains to start heating so that it can provide heat and hot water for the times you've told the system boiler you need it.

Is a Glow Worm Ultimate3 25 system a suitable choice for my house or flat?

To determine that, we need to consider the size of the boiler. Size doesn't mean how big it is - it means how big its "output" is.

The output rate of a boiler tells you how much power it has available to it for heating the water that comes out of your taps and warms your radiators. A higher output rate means that your boiler has more power at its disposal.

You need to make sure you select a boiler with the right output rate. That's because, if your output rate is too high, then your boiler will have more power than it needs but it will cost too much to run. If the output rate is too low, your water may often not be hot enough.

The Glow Worm Ultimate3 25 system's output is 25 kW, so which types of property would this Glow worm Ultimate3 25 System boiler be appropriate for?

An experienced Gas Safe boiler installer would recommend that the Glow Worm Ultimate3 25 system boiler would be an ideal installation option for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

How large is a Glow Worm Ultimate3 25 boiler?

The dimensions of the Glow Worm Ultimate3 25 are TBC mm [H] x TBC mm [W] x TBC mm [D].

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

The Glow Worm Ultimate3 25 is a condensing gas boiler - this is the type of boiler we recommend to most clients because they're better for the environment and they will save money on annual fuel bills.

A condensing boiler captures and recycles the warmth still present in both the flue exhaust gases and water vapour condensation created when gas is burned to provide your boiler with power.

This means it needs less gas to operate and it uses this extra energy to perform a number of tasks, including heating the colder water that comes back to the boiler from the radiators in your home.

How energy efficient is the Glow Worm Ultimate3 25 system boiler?

How we heat our homes and the damage this does to the environment has become a pressing concern for many homeowners worried about the effects and impact of climate change.

Around 14% of the greenhouse gases produced in the UK is a result of our central heating systems. Gas boilers are responsible for dangerous levels of nitrogen dioxide emissions in some of our largest cities.

Is the Glow Worm Ultimate3 25 system boiler an environmentally friendly choice for your home? Here’s what the figures say.

By law, boilers manufactured and supplied in the UK must achieve a SEDBUK rating of "A" and work at a 92% minimum efficiency. Before April 2018, a minimum of 88% energy efficiency needed to be achieved (88/89% = SEDBUK "B" and 90% = SEDBUK "A").

Following official testing, the Glow Worm Ultimate3 25 was given an efficiency rating of 89.7% with a SEDBUK rating of "B".

Energy efficiency is a measure of how much energy is used and how much is wasted when a boiler is operating.

What is the length of the warranty on the Glow Worm Ultimate3 25?

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