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I have 20+ year old space heater that is nearing end of life.

120 volt, 1500 watts

We use it in the camper when have electric hookup, and need a little extra heat.

I started looking online for a replacement, the one I have is not made any more.  There are some similar looking ones but the reviews of them are really bad.

I started looking at all the portable 120 volt, 1500 watt electric heaters.  Prices from $20 to $150 and even ones with the best reviews, have about 10%, 1 star reviews.  Things like, 

* Stinks like melting plastic even after hours of use.
* The cord melted
* The switch(es) melted
* Stopped working after a couple of hours (or a few days)
* No or very limited heat
* Auto tip over shutoff does not work 

I expect some level of poor reviews on any product.  And there are few of the normal stupid stuff, like "It won't heat my whole house" and "If I run it and a bunch of other stuff it trips a circuit breaker in the house".

Overall the level of potentially fatal flaws reported on all makes and models of portable 1500 watt heaters is scary.

Can a safe portable 1500 watt heater be purchased new in modern times?

If so what attributes will help me narrow my search to safe products? 

*P.S. over $150 they get too big to be portable, this is size limit not a budget constraint.* 

*P.P.S I have an integrated propane heater in the camper, the electric heater is backup/supplementary*