Climate watchdog proposes major reforms of Scottish EPC ratings
CCC proposals for EPC reforms in Scotland consist of introducing new ranking method for unique heating systems based on their direct emissions
The Weather Change Committee (CCC) has set out suggestions to reform Scotland’s Electricity Performance Certification (EPC) ratings with a revised focus on small carbon warmth.
CCC Chair Lord Deben has argued that the current EPC technique is not in good shape for purpose and has ultimately unsuccessful to incentivise the adoption in houses of electrical power effectiveness advancements and reduced carbon heating.
The opinions were being designed in an open letter composed to MSP Andrew Harvie, the Scottish Government’s minister for Zero Carbon Properties, Energetic Vacation and Tenants’ Rights.
Lord Deben mentioned the CCC recognized that devolved authorities in Scotland had been contemplating distinctive possibilities for rethinking the metrics of how strength performance is measured in homes under the EPC.
He mentioned that the committee welcomed efforts to review the existing EPC system in the country and wished to give assistance on the very best solutions for measuring the energy performance of houses in line with slicing carbon emissions.
Heating process rankings
4 most important proposals have been established out by the CCC in regards to reshaping EPC rankings. These include things like rating heating systems based mostly on their immediate carbon emissons.
A complete of six rankings are proposed by the CCC. The to start with of these ranks consists of heat pumps and hybrid heat pumps related to a biomass or hydrogen boiler with a green supply of the fuel and are classed as a ‘low emission option’.
The remaining five ranks mark a descending scale of performance ranging from other lower emissions methods this sort of as a hydrogen boiler linked to a green hydrogen supply and a warmth community working with a reduced emissions heat supply. Other rankings include district heat methods related to fossil fuel sources.
The sixth and last rank applies to present purely natural gasoline or oil boilers bought on the market.
The CCC said that the ranking would serve to give clarity on the various merits of using heating units when deciding how power productive a residence is.
Other recommendations for reforming the EPC rating contains a concentrate on overall vitality use intensity centered close to kWh/m2/yr. This would serve to give customers distinct data about the energy use in a house and aid enhance understanding about where improvements can be designed, the CCC said,
Yet another focus would be on identifying the fabric of a home and how this impacts overall energy effectiveness without having taking into consideration the heating process staying utilized.
The CCC reported: “It accurately incentivises enhancements to cloth performance when focused by plan, and can be made use of to evaluate genuine performance of present creating material and any enhancements designed.”
The ultimate metric proposed by the committee would appear at energy price depth dependent on the selling price of electrical power use for every sq. metre of property in a year (£/m2/yr).
These four metrics ought to also be backed by the inclusion of added residence-certain details that could impression the ECP rating, the CCC included.
These supplemental elements can include the flooring region of a property, what amounts of on-web site electricity generation there may be, as properly as the options for need overall flexibility to feed electrical power again into the grid.
Lord Deben’s letter included that the existing EPC system makes use of an “Energy Performance Rating’ (EER) that is typically made use of when devising coverage or when providing households. He said that the EER only served as a measure of electrical power fees and not system effectiveness.
Lord Deben mentioned: “It does not accurately incentivise the power efficiency and heating options required to decrease emissions.”
The CCC claimed it hoped to see reforms not only of the metrics used to assess the EPC scores, but also advancements to the all round method these types of as an overhaul of the SAP methodology applied to work out making effectiveness.
It also identified as for enhancements in the consistency and quality of EPC assessments by way of a concentrate on education and oversight.
Enhanced digital applications for the presentation of EPC data to aid look at and evaluate achievable overall performance and cloth alterations ended up also backed by the CCC.
The CCC reported that the EPC system could also be expanded as a suggests to superior tell householders about the risks to their house of overheating and flooding.
Lord Deben said the committee hoped to see increased clarity in the method for measuring electrical power efficiency.
He stated: “It is vital that the Scottish Government takes this prospect to get EPCs ideal, and we hope that our information can be of assist in this regard.”
Net zero overview
The publication of the British isles Govt-commissioned web zero assessment final thirty day period also backed revising the EPC rankings in buy to support give occupants a clearer view of the performance of a assets.
The findings from Conservative MP Chris Skidmore concluded that the current EPC technique and measurements were not successful to produce internet zero households and buildings. The critique stated: “The EPC rating of a home can at times present a worse score just after installing a heat pump simply because of the inclusion of the price of heating in the score, and this assessment staying primarily based on outdated assumptions.”