Vouchers must be used to install at least one primary home insulation or low carbon heating measure.
If you choose to install at least one of the primary measures, you can use your voucher to help cover the cost of secondary measures. The subsidy for the secondary measure is capped at the value of the subsidy provided for the primary measures.
For example, if you receive £400 for a primary measure such as a cavity wall insulation, you will be able to receive a maximum of £400 for a secondary measure such as an energy efficient replacement door.
The primary and secondary measures are set out below:
- Solid wall
- Cavity wall
- Under-floor insulation (solid floor; suspended floor)
- Flat roof
- Room in roof
- Park home insulation
Low carbon heat (where the home is suitably insulated):
- Air source heat pump
- Ground source heat pump
- Solar thermal
- Biomass pellet boilers
Windows and doors:
- Draught proofing
- Double/triple glazing (where replacing single glazing)
- Secondary glazing (in addition to single glazing)
- Energy efficient replacement doors
Heating controls and insulation:
- Hot water tank thermostats
- Hot water tank insulation
- Heating Controls (Smart heating controls, zone controls, intelligent delayed start thermostat and thermostatic radiator valves)