Oil-fired condensing boiler

HRM’s through-the-wall oil-fire boiler is now available as a condensing version in three sizes. They are said to be among the most compact condensing boilers available in the UK, which is achieved using a twin-chamber single-heat exchanger so that they have the same dimensions as non-condensing models. The heat exchanger is mounted on the inside of an external wall, and the combustion equipment is sealed within the wall — reducing noise and preventing kerosene smells indoors. These boilers can be serviced from outside. The condensing Wallstar is rated SEDBUK Band B. Sizes are 12/14, 15/19 and 20/24 kW, with a choice of two burners. The storage tank can be up to 100 m from the boiler.
Related links:



modbs tv logo

ICOM celebrates Noah Gaunt as Apprentice of the Year 2026

Noah Gaunt of Vaillant Group UK has been named ICOM’s Apprentice of the Year 2026, recognising his outstanding commitment, technical excellence and passion for advancing the future of low carbon heating.

BCIA warns non-domestic buildings risk being overlooked despite decarbonisation drive

Commercial and public buildings risk being left behind in the UK’s transition to Net Zero despite more than £40 billion of funding, investment and policy support being directed towards building decarbonisation, according to the latest Policy Pulse report from the Building Controls Industry Association (BCIA).