Originally Posted by Francesca Knowles
In case there's any confusion:
The link I posted entitled " Blue Flame Heater
" contains information pertinent only
to the Blue Flame Heater brand
unvented gas heater...
Okay, I get that. Since "blue flame" is a generic term for gas-burning non-catalytic appliances, the reference in the earlier post looked like it might be a general comment about this type of heater. I understand that it was intended as an example of how each heater has an associated manual with operating rules.
In the specific case of these Williams heaters: as I mentioned (but didn't explain well) above, the limitation seems to be related to heat output. All but the smallest model from this company is too large for rooms the size of a trailer, and the two smallest sizes are listed as exceptions for some rooms and mobile homes; RVs seem to be assumed to be too small for even the smallest (which has twice the output of a Coleman portable).