The acronyms, in plain English.
Boiler-and-heating world is wall-to-wall acronyms. Quick reference for the ones we use most on these pages.
- BUS / BUS grant
- Boiler Upgrade Scheme: a UK government grant toward an air-source heat pump install — £9,000 on oil or LPG (until 31 March 2027), £7,500 on mains gas. Runs to at least 2028. Only MCS-certified installers can apply on your behalf.
- CP12
- The Landlord Gas Safety Record is an annual safety check legally required on every privately-let property with gas appliances. Issued only by Gas Safe engineers.
- EICR
- Electrical Installation Condition Report: a periodic inspection of fixed wiring, required every 5 years on rentals since 2020. Codes findings as C1, C2, C3 or FI.
- kW (kilowatt)
- Unit of heat output. A 30 kW combi boiler can produce 30 kW of heat at full load. Sizing the kW to your home matters more than make/model.
- MCS
- Microgeneration Certification Scheme is the standard required for heat pumps, solar, and other renewables to qualify for grants and feed-in tariffs.
- NICEIC
- National Inspection Council for Electrical Installation Contracting: the body that certifies electrical contractors as competent for notifiable work.
- Powerflush
- Forced cleaning of a heating system to remove magnetite sludge and limescale, restoring radiator efficiency. Often required when fitting a new boiler to an old system.
- RCD / RCBO
- Residual Current Device / RCBO: circuit-protection devices that trip in milliseconds on an earth leak. Required on every modern consumer unit.