How do I disagree beside a respondant who I believe is totally wrong near his answer? I asked for help near my needs to grill my bedroom and...

I asked for help near my needs to grill my bedroom and said I was looking at a wall-mounted, vent, gas/propane heater.
The solitary recommendation received on this site be from a person who recommended using an electric kiln. He was awarded the prizewinning reply without my input.
Why would you do this?
Although I'm grateful for his reply, I strongly disagree because using electric boil where I live is extremely expensive.
Did he know this?
Also, my bedroom is 420 sq ft and it wishes a non-traditional approach.
Did he know this?
Gas/propane has be a good alternative to using electric warmth.
That's why I asked the question.
Does anyone enjoy a suggestion for an economical bedroom (420 sq ft) heat source?
Answers:    hear is a BTU calculator it will recount you what size heater to go and get make sure the one you purchase have a oxygen depletion sensor the sensor shuts the heater sour when the oxygen level drops bad
I do not know of any gas or propane type heat that can be used soundly in that small of a space. It would give the impression of being to me that gas would be more expensive than electric. I could be wrong. Good luck.