Purchased in late Nov 2022.  I will compare to the now-defunct IR400 in an old room (143 sf) w/ window cracked open for fresh air..  VMH600 is okay.  Needs to be next to you.  Can dry your mouth during overnight sleeping.  BUT no risk of industrial plastic smell.  Also wish a traditional bulb was used.  LED lighting is bad for everyone's eyes & sleep.  The IR400 would keep a whole room warm BUT it might have that plastic smell.  I purchased 10 of 'em for warehouse work but the one i bought for myself had the toxic plastic smell so I gave it away.  I still use it at my job in upstairs office where everyone complains about how hot it makes our 600 sf space