It is currently servicing around 4 million homes and businesses,[citation needed] supplying LPG to power gas appliances from central heating and hot water, as well as cookers, fires and barbecues.

Calor originally dealt only with cooking and heating appliances, but now covers a wider range of products for home, business, and automotive fuels.

The 1950s saw the introduction of the Flavel B500 cooker, which used Calor gas; it became a great success story with caravan owners and smaller households.

[3] 1956 saw the birth of Calor's industrial division and installation of the first "bulk propane" tank at the Meredith & Drew biscuit factory in Newmarket.

[3] The second was a joint venture with Conoco to excavate a vast cavern on South Humberside, capable of containing some 100,000 tonnes of gas supplied from an adjacent sea terminal.

This facility, opened in 1985, gave Calor the ability to overcome short-term supply difficulties and to cope with major changes in demand brought on by extremes of weather.

[3] During the 1980s, Calor's domestic central heating and industrial markets continued to expand and in 1982 the company's head office moved to a 40-acre (16 ha) site near Slough.

[3] Despite great efforts to establish a nationwide network of outlets, Calor Autogas (vehicle propane) never quite reached expectations, due largely to the Government's inability to recognise its considerable environmental advantages by reducing duty.

However, the fuel did become very popular for fork lift trucks, helped greatly by the launch, in 1989, of Calor's exhaust purification system, EPS2000, which enabled vehicles to be used both indoors and outside.

[5] In 1988 the privately owned Dutch company, SHV became a significant shareholder, acquiring 40% of Calor Group's equity.

[6] On 16 of February 2023 Calor announced workforce reduction of 114 positions in Commercial, Operations and Central Functions departments.

A new Calor Lite cylinder, produced from lightweight steel, released in 2008, was targeted at the caravan market but has now been withdrawn due to production issues.