Heavy flamer

From Lexicanum

The heavy flamer is a much larger and bulkier flamer.

It produces a larger flame capable of enveloping more targets. Few armies (except Space Marines, Sisters of Battle and Chaos Space Marines) carry it by hand, but it is sometimes fitted to vehicles. The Catachan Jungle Fighters carry it by hand due to the nature of their combat - fighting in jungles makes flame weapons an important asset. It is a standard weapon of Space Marine Terminators.¹

Sources

• ¹:Warhammer 40,000: Wargear (3rd Edition)