I have a house built in the 1930s.  It had a gas heater built into the bathroom wall at that time.  Finally the control switch malfunctioned and couldn't be repaired. It was obsolete and couldn't be replaced.  The plumber suggested and installed this one.  It is not obtrusive attached to the bathroom wall, and it has heated my bathroom perfectly.  Turning it on for just a few minutes prior to taking a bath takes the chill off the air and makes the room comfortable.  Last winter my furnace malfunctioned, and I had no heat from it for two days.  I used this heater with the bathroom door open,...