Yes. We agree with the criteria proposed to inform technology eligible for support. However, we think that there is a case to be made for having a degree of flexibility with the proposed criteria in certain circumstances.
The consultation notes that by applying the proposed criteria for technology support the department would consider providing support for the following:
- Air to Water Heat Pump
- Ground to Water Heat Pump and
- Water to Water Heat Pump
We think that an offer of financial support to install low carbon heating should be available to as many people as possible. It will therefore be important that any criteria aren’t so tightly defined that they would preclude support for some other technologies in specific cases where the above technologies weren’t appropriate for a particular property.
Air-to-air heat pumps
We also recommend the inclusion of air-to-air heat pumps on the list of technologies that the department should consider providing support for. This could be done by including air-to-air heat pumps as a separate technology within the list or by simply referring to air source heat pumps (as the term air source heat pumps technically encompasses both air-to-water heat pumps and air-to-air heat pumps).
The inclusion of air–to-air heat pumps would help to ensure that the proposed low carbon heating support scheme is able to support the installation of low carbon heating in more homes – because there are some housing types that air-to-water, ground-to-water and water-to-water heat pumps are not suitable for but that air-to-air heat pumps are (for example flats).
Air-to-air heat pumps transfer heat from the outside air to the air inside a home, increasing the air temperature in each room. This warm air enters a home through a series of fan coil units, or ‘blowers’. Air-to-air heat pumps are sometimes referred to as air conditioning.
While many people think of air conditioning as a way of cooling buildings, it can also be used for heating. Indeed, air-to-air heat pumps are a well-recognised technology that has been deployed widely across the world for cooling and also for heating purposes. Indeed, some European countries (for example Norway) have seen air to air heat pumps or other reversible heat pumps providing the bulk of their heating solutions, rather than relying on air-water or ground-water heat pump technology.
We would welcome the opportunity to provide more information to the department about air source heat pumps if it would useful and would likewise be happy to meet with the department to discuss this technology in more detail if it would be helpful.
However, we note that the inclusion of air-to-air pumps as a technology that the department would provide support for may not be consistent with the Proposed 7th criteria that an eligible installation must “…provide full space heating and hot water needs of the property year-round.” and as such there may be a need to drop this requirement in appropriate circumstances where air-to-air heat pumps are suitable but another technology will be required for water heating.
Biomass boilers
As we note in our response to question 3, we also think that the department should consider supporting biomass boilers in exceptional circumstances. This would also necessitate some flexibility with some of the proposed criteria.
Heat batteries
We also think that the department should give consideration to the inclusion of heat batteries as a technology that could be eligible for support in cases where no heat pump technologies are technically feasible. We note that prior to June 2024 the Scottish Government’s Home Energy Scotland Grant and Loan supported applications for energy storage systems, including heat batteries.
Given the role that such technologies can play in providing flexibility for the grid and the fact that the grid in many parts of rural Northern Ireland has limited capacity, the department in Northern Ireland may want to consider whether it would be appropriate for support to be provided for such systems under any new support scheme.