Efficiency Comparison: Ground Source Heat Pumps versus Gas Boilers – Advantages and Disadvantages
Installing a ground source heat pump is a significant decision, especially when other heating options are available. Here's what you need to know about this alternative to traditional gas boilers.
The government has pledged to work with suppliers to bring the cost of heat pumps in line with gas boilers by 2030. However, it's important to note that ground source heat pumps are currently more expensive to install, despite the Boiler Upgrade Scheme helping to reduce costs.
Ground source heat pumps and gas boilers are two distinct types of heating systems. While gas boilers rely on natural gas, ground source heat pumps harness the natural heat from the ground. They can be installed in two ways: horizontally or vertically (borehole system).
The Boiler Upgrade Scheme, set up to help with the increased costs of alternative heating systems, will end in 2028. From then on, homeowners may find themselves shouldering more of the installation and purchase costs.
Ground source heat pumps have a projected lifespan of 25 years, with the ground array pipework estimated to last around 100 years. They also offer several advantages, such as producing more usable heat energy than they consume, leading to lower energy bills, and lower CO2 emissions compared to gas boilers.
However, the process of installing a heat pump requires careful planning. This includes obtaining permission from the Distribution Network Operator, applying for the Boiler Upgrade Scheme grant, and performing a full heat loss calculation. It's also worth noting that switching to a heat pump may require finding space for a hot water storage cylinder, which can be challenging in smaller homes.
The space required for a ground source heat pump installation depends on the chosen method. Horizontal installations require more space, while vertical borehole systems can be more space-efficient.
One of the benefits of ground source heat pumps is their discreet design. They are housed inside with no visible external components, making them a good choice for those who want to maintain their home's external appearance during renovations.
However, experts caution that in certain situations, gas boilers may be more practical. This is due to lower upfront costs, reliable technology, and potentially higher total costs of hybrid or heat pump systems in typical single-family homes, especially if the heat pump’s efficiency is borderline, and the installation or operational costs for heat pumps are comparatively high.
Ground source heat pumps can also provide cooling for homes during hotter summer months. However, it's worth noting that some network providers may not allow the installation of a heat pump due to limitations with the incoming electricity supply.
Lastly, in emergency situations, homeowners may find it necessary to opt for a boiler replacement instead of waiting for a heat pump installation.
In conclusion, while ground source heat pumps offer several advantages, such as lower energy bills and reduced CO2 emissions, it's crucial to consider the upfront and ongoing costs, installation requirements, and your specific heating needs before making a decision.
