The residence is aged as well as really tiny (850sf), no radiator, no fireplace. There have been no airducts for a/c or heat.
If we were to feverishness the place similar to which what would be the many efficent as well as slightest invasive sorts of heating to add? (holes in the drywall have been ok given it looks transposed as well as stuff oneself gas lines in as well though can’t do the vital remodel)
google " direct vent heaters" all you have to do is make a small hole in the wall. here is an example.
http://www.stpaulmercantile.com/eskabeusa.htm