12 | Future proof
What the path to net zero will look like Martyn Bridges discusses the alternative technologies to hydrogen and heat pumps which can contribute to net zero 2050. Preparations for net zero 2050 are well and truly underway. Having spoken a lot about how hydrogen solutions and heat pumps will contribute to decarbonisation, it is worth turning the conversation to the alternative technologies set to play equally crucial roles. These technologies include bio-oil -fired boilers and Heat Interface Units (HIUs). While somewhat overshadowed in conversations surrounding decarbonisation, each one can offer crucial solutions in the bid for net zero. So, how can we use each of these technologies and how are they best situated for decarbonisation?
Oil boilers Oil boilers will not be familiar to the majority – in the UK, some 23 million homes have a gas-fired central heating system, while only 1.2-1.3 million have oil-fired heating. They are a minority in comparison, but from an urgency perspective, targets concerning oil-fired boilers are the first BEIS have in their sights. It is rare to see oil boilers being installed into new build properties, as it is difficult to achieve the emission ratings in such properties. They are mostly found in the 1.2-1.3 million existing homes that are off the gas grid. These homes are mainly in remote areas where gas is not available and in old properties or even listed ones which are difficult to insulate or renovate. To substitute oil with anything other than oil is a tough challenge. The government is currently hoping that heat pumps will be the technology to save the day here – in fact, a new scheme will come into operation on 1st April 2022, offering a £4,000 upfront payment to consumers to swap an oil boiler for an air-to-water heat pump.
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Oil heating systems can be decarbonised with a high blend of HVO rather than having the entire heating system swapped out for the only other alternative on the table. Whilst the new scheme is encouraging, it is somewhat limited in detail. As many homes will need some fabric upgrades and changes made to the radiators and pipework. Consequently, the £4,000 may not make much of an inroad to the actual costs required for the change.
