Hello,

I have a room (with good ventilation) that I want to heat with gas. Not
on an ongoing basis, just for short times here and there, and not by
much, maybe a few degrees C (single digits).

I know those "infrared" gas burners (I don't know the proper name),
where gas burns in a usually rectangular enclosure and creates a red
glow that then radiates to the surroundings. This is what I wanted to
get, but I'm having trouble finding such a burner here (in Brazil).

So I thought that for heating up a room, it shouldn't really matter how
exactly the gas burns... if I burn a kg of gas in such a burner, or if I
burn it in a normal burner designed to heat up pots, the heat energy
transferred to the surroundings (the room) should be the same. (Assuming
that the burner efficiency is the same.)

I understand that if you stand in front of such an infrared burner, you
feel much warmer than if you stand in front of a pot heater burner, and
that possibly the infrared burner heats the walls up more (rather than
just the air), and therefore there may be a certain difference in
heating up the room, but I imagine that the difference is small, despite
the gut feeling that the infrared burner is "warmer".

Do I miss something here? 

I could get some burners for chicken grills and mount a small panel with
them (they are similar to the infrared burners I know), but if just
using a ready-made burner for cooking has the same effect, I could spare
myself the trouble.

Thanks,
Gerhard
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