The boiler upgrade scheme (BUS) appears to have hit a ceiling far short of the government’s projections, Utility Week analysis of the scheme’s data reveals. For the past 12 months, the number of voucher applications for heat pump grants has hovered between 1,300 and 1,600 a month. One industry expert has suggested that this is because of a “constraint in the system” which offers subsidies to consumers for installing heat pumps in their homes, while others have suggested that mixed messaging around home heating is preventing greater uptake.