I need a portable heater

[Beest]

Originally Posted by footfootfoot

Infra red heaters heat the objects in their path, so that value of heating a 1000sf room is assuming you won't be too far from the source to be warmed by it. The trouble is, if you are in the 'shade' of a large horse, you will not receive the benefit of the heat. IR heat is like standing in the sun on a cold day. It is still cold outside, but you are warm as long as you are in the sun, move to the shade and you are cold.

It is my reading that they both use radiant heat internally but have a blower to blow out hot air to fill the space.
Given enough time they should heat the all of the air in the space, not just line of sight areas.
BTU's is a measurable quantity of heat, 'suitable for a 1000 sq ft space' is proably just somebodies guesstimate.
Important might be how strong the fan is, if it's too weak it might not push the warm area around the whole space.
Customer reviews would be good, I checked Amazon, The CZ one is one there, at the same price, but no reviews