Review (1/5): did not last after 2 season
Theses were great the first year, but become unreliable year 2 and 3. stopped working or had wild fluctuations in temperature - cooked out of bedroom one night cold the next. Going back to my trusty Gorton's...true you can't adjust Gorton's, but I have had ones in my home working for over 50 years..just go to their website and learn which ones to use where, and after a little experimenting you'll be happy. Hoffman's are also excellent if you want adjustable and reliable - I have one's from the 50s that still work!! I had high hopes for Vari-valve, but for 130 buck and can't last 3 years...nope. of the six pack, only 2 are still working....not funny.