A substantial portion of your annual energy bills goes towards heating and hot water costs. This means having an efficient boiler fitted at your home can make a huge difference towards the energy efficiency and cost savings of your home.
Newer boiler models are far more energy efficient, especially if your existing boiler is what’s called “non-condensing”. Condensing boilers are more efficient as they capture a greater amount of heat from exhaust flue gases and utilise it to warm the central heating water, resulting in a much higher efficiency compared to older boiler models.

Recognising if your boiler is condensing  or not is straightforward using the following criteria: In the UK, nearly all gas boilers installed since 2005 are of the more efficient, condensing type. Your boiler can be identified as condensing if:

• Flue Material: If the boiler flue is constructed from plastic, it suggests it is a condensing boiler. Conversely, if the flue is made of metal, it’s unlikely to be a condensing model.
• Plastic Pipe Outlet: Condensing boilers typically feature a plastic pipe emerging from the bottom of the boiler. This pipe extends through the wall and leads into a drainage system.  It us often white.
• Installation Date: If the boiler in question is a gas or LPG boiler that was installed after 2005, or an oil boiler that was installed after 2007, it is likely to be a condensing model due to the efficiency regulations implemented during that time.