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Air Source unit or gas boiler?

Air source units and gas boilers are two popular heating systems used in UK homes. Both systems provide reliable and efficient heating, but they differ in terms of energy efficiency, cost, and environmental impact. In this article, we will compare the efficiency of air source units and gas boilers in 2023, using statistics and data from reliable sources.



Efficiency of Air Source Units


Air source units are a type of heat pump that extract heat from the air outside and use it to heat the home. They work by absorbing heat from the air outside and then transferring it to a refrigerant, which is then compressed to increase its temperature. The hot refrigerant is then used to heat the home through a network of pipes and radiators.

According to the Energy Saving Trust, the average efficiency of air source units in 2023 is around 300%. This means that for every 1 kW of electricity used to power the system, it produces 3 kW of heat. However, the actual efficiency of an air source unit depends on various factors, such as the size of the unit, the outdoor temperature, and the insulation of the home.


In terms of cost, air source units are generally more expensive to install than gas boilers. The cost of an air source unit can range from £6,000 to £12,000, depending on the size and type of unit. However, the running costs of an air source unit are generally lower than those of a gas boiler, as electricity is cheaper than gas.



Environmental Impact of Air Source Units


Air source units are considered to be more environmentally friendly than gas boilers, as they do not produce any carbon emissions on site. However, they do require electricity to operate, which may be generated from non-renewable sources such as coal or gas. To minimize their environmental impact, it is recommended to use a green energy supplier or generate electricity from renewable sources such as solar panels or wind turbines.



Efficiency of Gas Boilers


Gas boilers are a type of central heating system that use natural gas to heat the home. They work by burning gas to heat water, which is then circulated through a network of pipes and radiators. The efficiency of a gas boiler depends on its age, size, and type of boiler.

According to the Energy Saving Trust, the average efficiency of a gas boiler in 2023 is around 89%. This means that for every 1 kW of gas used, 0.89 kW of heat is produced. However, older gas boilers may have much lower efficiencies, around 70% or less, which means that a significant amount of heat is wasted.


In terms of cost, gas boilers are generally cheaper to install than air source units, with prices ranging from £2,000 to £4,000, depending on the size and type of boiler. However, the running costs of a gas boiler are generally higher than those of an air source unit, as gas is more expensive than electricity.



Environmental Impact of Gas Boilers


Gas boilers are a major source of carbon emissions in the UK, as they burn natural gas to produce heat. According to the Committee on Climate Change, heating buildings and hot water in the UK accounts for around 21% of the country's greenhouse gas emissions. To reduce their environmental impact, it is recommended to use a high-efficiency gas boiler or switch to a renewable heating system such as an air source unit or a ground source unit.



Conclusion


In conclusion, air source units and gas boilers are two popular heating systems used in UK homes. Air source units are generally more energy-efficient and environmentally friendly than gas boilers, but they are also more expensive to install. Gas boilers are cheaper to install, but their running costs are generally higher than those of air source units.

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