Modular Heating Sales (MHS) was founded by John Bradley and Michael Mainstone in 1980. The new venture was initially managed from a 2,000 sq ft office in Basildon, Essex, where it quickly built a reputation acting as an agent for an already recognised commercial boiler brand between 1980 and 1984. Afterwards, MHS Boilers soon became an established company in its own right, growing from strength to strength into one of the most well-known independent suppliers in the UK commercial boiler market.

After becoming an official partner for Rendamax condensing boilers in 2002, MHS Boilers moved office and warehousing facilities to support its expanding market share and range of products. After several successful years working with Rendamax and the Ariston Thermo Group, ELCO International acquired MHS Boilers in 2010 to start a new chapter in MHS Boilers’ history.

1John Bradley and Michael Mainstone 1Michael Mainstone 1 1Strata 2 boiler 1MHS Boilers at previous HQ in Basildon 1 1 1 1Training at MHS BOilers HQ in Basildon 1 1MHS Boilers liveried trucks 1New and current HQ for ELCO in Basildon

Photo Gallery


  • 1980
    Modular Heating Sales (MHS) founded by Michael Mainstone & John Bradley
  • 1984
    MHS launched its Regency boiler sold in a modular format with the single pipe header system
  • 1990
    MHS Radiators founded as a separate division
  • 1994
    MHS joint venture to produce the heat exchanger which was the heart of the Strata boiler
  • 1998
    MHS imports water heaters from MTS Group (now Ariston Thermo Group)
  • 2000
    Ian Bradley, son of MHS’ founder John Bradley, appointed as Managing Director
  • 2001
    MHS Boilers wins Deloitte & Touche 100 Fastest Growing Businesses Award
  • 2002
    MHS Boilers is appointed an official partner for Rendamax condensing boilers (part of Ariston Thermo Group)
  • 2006
    MHS Boilers moves from Schimiter Park to a new 45,000 sq/ft premises in Basildon
  • 2010
    MHS Boilers is acquired by ELCO International (part of Ariston Thermo Group)
  • 2011
    MHS Boilers/ELCO launch a new renewables range of products including solar thermal panels, air and ground source heat pumps