Due to the international crisis of global warming, the majority of western countries are now set on a course to become carbon neutral and at the Paris Accord, they agreed to achieve this by 2050. This is an impressive feat for countries still so reliant on fossil fuels for major industries like heating and transport.
Residential heating is one area that is currently in the spotlight, for instance, in countries like the UK, it is currently responsible for around one-third of carbon emissions. As a result and understandingly it is set to undergo major reform over the next 10 years.
What’s the problem with current heating?
Heating in the UK is still heavily reliant on fossil fuels, either directly or indirectly. For instance, the vast majority of homes are supplied with natural gas which is burned in fireplaces and gas combi boilers to provide homes with heat.
The major issue is that burning natural gas releases carbon into the atmosphere, which is a gas that doesn’t leave the atmosphere, resulting in heat being trapped in the atmosphere, leading to global warming.
Therefore, the UK government is looking at low carbon heating alternatives as a route to transforming the current situation, which includes the likes of heat pump, hydrogen boiler and solar.
As Heatable states, residential boilers have already been under considerable scrutiny and the government has banned non-condensing boilers, driving up the efficiency of boilers to above 90%, as well as a total outlaw on all gas boilers in new homes from 2025.
Yet, it’s important to note that most industry commentators consider replacing gas boilers with solar and heat pumps completely unrealistic. Major concerns include their expensive and disruptive installation, as well as their reliability when compared to conventional boilers.
As a result, replacing the fuel is seen as a much more realistic approach with the fuel of choice being hydrogen. This can be fed into the current infrastructure and used with hydrogen-ready boilers, which are almost identical to current natural gas versions.
Hydrogen Boilers vs. Heat Pumps
There are many issues when it comes to the transition from high to low carbon heating technologies. So much so, that the Environmental Audit Committee (EAC) estimated that it would take almost 1,000 years to make the switch if the current trajectories continued.
Even worse, the Committee on Climate Change (CCC) highlighted that it would cost on average £26,000 for each home to install a low carbon heating alternative, rending the whole idea completely unviable.
The only sensible solution is the adoption of hydrogen fuel as an alternative to natural gas instead. This fuel is able to make use of the current gas networks infrastructure which is already connected to the vast majority of properties.
From an environmental standpoint, hydrogen is also seen as highly desirable.
Why? When hydrogen is burned it produces only vapour and absolutely no carbon dioxide making it ideal for a carbon-neutral future.
Disadvantages of Heat Pumps
As well as that, there are also other issues with heat pumps, of which there are three main types: air source, ground source and hybrid. All of which works by sucking in heat from the surrounding air, ground or water and are able to supply heat to water and central heating.
Hybrid heat pumps are different in that they utilise a boiler to provide supplemental heat if the weather becomes severely cold.
The good point of heat pumps is that they only use small amounts of electricity to operate and combined with the fact that they absorb heat from the environment, they are extremely efficient. In fact, they can achieve energy efficiency ratings exceeding 300%, compared to modern gas boilers that are around 94%.
However, it’s not all positive sadly and heat pumps are unable to provide the same, consistent heat output that gas boilers are able to. For this reason, they are usually installed with oversized radiators and/or underfloor heating and only in properties that are extremely well insulated.
Heating is without a doubt going to change and countries like the UK are going to transition away from gas boilers, but what will win – heat pumps or hydrogen?
It seems that hydrogen has the advantage from a feasibility standpoint, but there’s little doubt that heat pumps will be part of the mix too.
It’s becoming more common for gas boilers to be installed with a hybrid heat pump system.
The first homes fitted with hydrogen boilers and appliances are going to be installed in Fife, Scotland from next year, so progression is certainly accelerating.