The Scheme encouraged the installation of primary measures which would produce the greatest carbon savings, and which homeowners would be less likely to install without the support of a grant. However, over the short six-month duration of the Scheme, this created a tension with its objective to create jobs.23 This short duration was to encourage homeowners to take advantage of the scheme quickly, however, primary measures often required specialist skills that were difficult to recruit or train or were in supply chains which were not as able to scale up to meet increased demand.24 For example, whilst heat pumps were one of the measures encouraged by the Scheme, it can take as long as 48 months to learn how to install one.25