Propane infrared heater

Have a new HF 10x12, just finishing putting it together and it's snowing already. Seen one of these heaters on craigslist for a really good price. I've been lloking at them in Lowes. I just don't know about the "heating people and things before the air". Any experience?

I have one of those little buddy heater that I've used in a motorhome. The only real problem I had was that for every pound of propane they burn they produce 3 pounds of water which the condenses on the glass. If you are looking at one of those that are round and screw onto the top of a 20lb cylinder (like this http://www.google.com/products/catalog?hl=en&sugexp=kjrmc&cp=12&gs_id=5d&xhr=t&q=radiant+propane+heater&pq=solar+insolation+map&safe=off&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=960&bih=475&um=1&ie=UTF-8&tbm=shop&cid=4940323819585234245&sa=X&ei=RFitTqC9DOPw0gG60IWRDw&sqi=2&ved=0CHUQ8gIwAQ ) the I think it will produce too much heat.

No, I'm looking at radiant floor models. The water issue is interesting, though.