I got this heater to keep my living room / dining room warm. The heater came very well packaged. Once I got the heater set up - I set the t-stat and put the heater on medium. The heater warmed the rooms up quickly - in fact I had to set the heater to minimum because the rooms were getting to warm. The 24 hour timer doesn't make much sense to me, so I don't use that feature. My thinking is you don't want the heater to completely shut off and let the room get cold and then turn the heater back on from cold to re-heat the room. Why not just maintain the temp?!