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Energy Saving

Gas Boilers

All new gas boilers are condensing boilers. These types of boilers make better use of the heat they generate from burning fuels such as gas or oil.

Condensing technology improves the efficiency of modern boiler systems by extracting heat from exhaust gases and reusing/recycling it – something which makes some condensing boilers as much as 25% more efficient than non-condensing boilers, reaching up to 99% efficiency. Condensing boilers are also considered a lot safer than older systems.

IU Energy is qualified and highly experienced in surveying and installing commercial gas boilers and is trusted by clients in hotels, care homes, councils and hospices, amongst others.

You can download a Technology Information Sheet here.

Below are some of our case studies for projects we have been carried out in efficient gas boiler installation, followed by FAQs.


All modern boilers use condensing technology.

A combi-boiler is a specific type of heating system. It combines water heating with central heating in one unit and takes up much less space than a traditional boiler installation. A combi-boiler works by heating water directly from the mains outlet (as opposed to feeding in from a water tank). It also means that your water is always delivered with mains pressure.

This technology is only suitable where the demand for hot water is low.

‘Condensing’ boilers use technology that improves the efficiency of modern boiler systems. It collects the heat or vapour from flue gases and reuses/recycles it, something which makes some condensing boilers as much as 25% more efficient than non-condensing boilers, reaching up to 99% efficiency. It is increasingly fitted in combi boilers.

Most commercial applications benefit from a full system boiler where water is stored in a tank. System boilers provide space heating directly, whilst also supplying hot water to a storage cylinder. They have most of the individual components of a heat and hot water system built into the boiler unit, so whilst they do require a separate cylinder, unlike a conventional boiler they don’t also require a cold-water tank.

Hot water is pumped through the radiators and the hot water cylinder, delivering a faster response, which could be more economical and mean lower running costs than a conventional boiler.

We recommend a service package which includes annual servicing. This is necessary for both reliability and the safety of the plant.

If you’re in Food, Healthcare, Beverages, Paper, Packaging, Pharmaceutical, Petrochemical, Feed Mills, Agriculture, Laundries or Textiles, please contact us for a more detailed conversation as your system will necessarily require more planning. 01252 26 26 26

The general lifespan of a boiler is around 10 to 15 years. While this is an average, your boiler may last longer if you take good care of it.

You should decide to replace your boiler when repairs become too expensive or start mounting up. Opting for a new boiler at this point should save you money in the long run.

To find boilers that are economical, look for their ENERGY STAR rating. A well rated boiler should run very efficiently, whereas a poorly rated model may be more cost effective to replace in the long run.

You should find that all modern boilers are more economical when compared to older models.

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