English to French Tech/Engineering Energy / Power Generation heating device

Hi Y'All,

I'm sorry, I don't know the proper name for this thing even in EN, and I would like to know it in FR to search for it on the Web, I'm looking to buy one or more for my B&B --- so it's not related to a translation but will give rise to POINTS anyway! :)

I'm talking about those things that are like a mushroom mounted on a tall column [about 2.5 m high?] where the "stalk" of the mushroom [on top of the thinner column] comprises the radiating part, the mushroom cap being a downward deflector. The ones I have seen are usually butane bottle powered [the bottle being housed in a casing at the bottom], they are movable on a small wheeled platform, and they are used in places like greenhouse extensions to restaurants, patios, sidewalk cafes, etc. [I'd draw you a picture if the system would allow for it! :)) = clin d'oeil, je vous ferais même un dessin!]

Decisive element for points adjudication, if you could actually find me a site in France that sells or at least describes them ... [I never said I wasn't lazy, ok?]

Many thanks in advance

Dee