Boiler Efficiency and Types

Many homes in the UK use a boiler or furnace to supply their heating. Furnaces heat and distribute air by way of duct systems. Boilers produce hot water distributed through baseboard radiators. By operating at a higher temperature, the steam used to heat boilers are less efficient than hot water boilers. But a combi-boiler can provide central heat in conjunction with a high-efficiency water heater and that is why they become more and more popular nowadays.

High Efficiency Combi Boilers

The high-efficiency combi boilers are combination solutions intended for central heating and hot water needs. They are designed to alleviate the all-too-familiar situation of having ice cold water in the shower. Compact in size, these first class boilers produce a range of energy and heating products. With ErP ratings of “A”, the high efficiency nature of these boilers reduces long term running costs. With quiet operation and competitive pricing, there are different outputs available for different home sizes.

Heat-only Boilers (Open-Vent Boilers)

The heat-only boilers offer hot water and central heating with a single boiler. Only one storage cylinder and water tanks can provide efficient service. Each of these designs are designed for easy use and longevity. With ERP ratings of “A”, these lightweight designs fit into a small space. Offering low running costs and long tern warranties, they operate on a quiet scale too.

System Boilers (Sealed System Boilers)

The system boilers provide hot water and heating systems with the use of a storage cylinder. Compared to traditional boilers, this design alleviates the need for separate water tanks at home. These models are ideal for those who have limited storage space for their water heaters, or families who don’t want hot water used from multiple locations simultaneously. These systems alleviate the need for an expansion tank therefore freeing up valuable storage space. That said, they are also more efficient and fiscally reasonable for installation. With various output models, these boilers are rated for efficiency to help reduce overall costs.

Boiler Efficiency

Boiler efficiency is measured by how efficiently a system uses fuel. This value is measured by how efficiently the boiler converts energy into heat over the course of one year.

ErP Directive

At the end of 2009, the EU created new energy efficiency frameworks called the ErP Directive. By working to improve energy efficiency in things like boilers, consumers can enjoy long term cost savings while simultaneously reducing the negative environmental impact. That said, the boilers are now given ratings for their efficiency levels which are listed on each of the boiler products. Those ratings can be used by consumers to realize cost savings from new boilers. Professionals from Glow Worm can calculate your current heating system and property data to evaluate the options best suited to reducing your energy bill. They can even cater the results to the energy savings you want to see in the future.

How to Choose a Boiler

Before you select your boiler, it is imperative to speak with a professional to determine the best suited model for your home. While these combi boilers have risen in popularity, an in-home evaluation from a licensed professional is the only way to ensure the design you have selected is best for your needs. Our recommendation based on the house size and boiler faunctionality versus highest provided efficiency is:

  • Energy Combi boiler- with outputs 25 kW, 30 kW or 35 kW for middle to big houses, hot water and heating combi solutions
  • Procombi Essential – with outputs 24 kW, 28 kW or 35 kW for middle to big houses, hot water and heating combi solutions with further saving on using LPG instead of NG
  • Energy System boiler– for central heating only solution with outputs suitable from small araprtments 18 kW to big houses 30 kW