Brands.
Who actually makes the kit; and what a thoughtful UK buyer should know.
- Daikin
The world's largest AC manufacturer, with the deepest UK installer network and the strongest residential range from value (Sensira) through to flagship (Perfera).
- Mitsubishi Electric
Design-led indoor units, premium build, exceptional filtration. The brand you choose when the wall placement is part of the room.
- Toshiba Carrier
A serious third option in UK residential AC; strong on inverter performance and value, smaller installer network than the top two.
- Vaillant
Heating-first European manufacturer with the aroTHERM plus R290 range; the unit most thoughtful MCS installers default to in 2026.
- Worcester Bosch
Britain's best-known boiler brand. Heat pump range is improving fast but still trails Vaillant and Mitsubishi on field experience.
- Samsung
The credible value-tier heat pump brand in 2026; strong measured efficiency, lower headline price, smaller installer base.
- Octopus Energy
Energy supplier, installer and own-brand unit (Cosy) wrapped into one. Fixed-price surveys, one warranty, integrated tariff; at the cost of installer choice.
- Ideal Heating
British-built boilers from Hull with a deep installer base and warranties that compete with brands twice the price. Ideal has spent a decade rebuilding its reputation, and the Logic Max range is the result.
- Viessmann
German heating-first manufacturer whose Vitodens combi range is the closest a UK gas boiler comes to feeling considered. The build quality is unmistakable on first install and the controls behave like they were designed by people who have lived with them.
- Baxi
British boiler manufacturer with a deep installer base and a sensibly-priced combi range. The Baxi 800 is the unit your local gas engineer is most likely to have on the van when a same-week swap is the brief.