The present invention provides a safer all-around radiation heating assembly than similar traditional heaters. As typical with traditional heaters, a shroud is used to surroundably cover a portable liquid propane tank. To replace the portable liquid propane tank, the shroud must be continuously raised to a predetermined height while a service person accesses the propane tank. There is a danger that if and when the shroud drops, a spark could be created resulting in igniting highly flammable escaped propane gas. The present invention overcomes dangers associated with the traditional heaters by eliminating the spark creation danger and by introducing a ventilation system to allow any leaked propane gas to escape away from the heater.

The present invention provides a safer all-around radiation heating assembly than similar traditional heaters. As typical with traditional heaters, a shroud is used to surroundably cover a portable liquid propane tank. To replace the portable liquid propane tank, the shroud must be continuously raised to a predetermined height while a service person accesses the propane tank. There is a danger that if and when the shroud drops, a spark could be created resulting in igniting highly flammable escaped propane gas. The present invention overcomes dangers associated with the traditional heaters by eliminating the spark creation danger and by introducing a ventilation system to allow any leaked propane gas to escape away from the heater.

The disclosure relates to a gas-heated infrared radiation emitter comprising a burner plate, the burner plate serving as a combustion surface, and a radiating screen positioned on the combustion surface side of the burner plate. The radiating screen is formed by a mesh material or material with open pores, and has an inner face oriented towards the combustion surface side of the burner plate. The inner surface of the screen comprises at least a first portion and a second portion offset from one another in relation to the combustion surface, such that the distance between the combustion surface and the first portion is less than the distance between the combustion surface and the second portion.

The present invention provides a foraminous burner liner for a gas abatement system. The burner liner comprises a hollow body defined by a wall, the wall comprising a plurality of interconnected substantially concentric layers. Each layer of the wall comprises a substantially regular openwork mesh; wherein the substantially regular openwork mesh of each layer is configured such that it is out of phase with one or more adjacent layers, and wherein the wall comprises sufficient layers arranged such that the wall is optically opaque when viewed externally in any radially inward direction normal to the wall.