This particular regular boiler also has a high-efficiency rating of 89.4% and an ErP A-rating for central heating, which means you could potentially reduce your energy bills with this boiler.
The Promax SL 18kW is the most powerful regular boiler in its range that is available to buy. Originally, there was an additional 24kW regular boiler included in this range, which has now been discontinued and been replaced by the Promax HE Store. The Promax SL Heat 18kW is ideal for homes with up to 15 radiators and a bathroom. Many smaller homes may not require this high of a demand for central heating and hot water and therefore the 12kW or 15kW would be better suited for them.
Regular boilers are typically fitted with an additional cold water feed that is installed in the attic of your home, as well as a hot water storage tank, typically located in an airing cupboard, meaning if you have a smaller home with limited space, a regular boiler is not suitable for your home.
