Review on Natural Gas Heater: Mr. Heater Vent-Free 20,000 BTU Blue Flame - Multi-Size Option by Dave Branch

Very happy with these heaters. I've purchased and installed 2 of the 20,000 BTU units. Both work great. I LOVE that they have made these able to be worked on. You can easily open them up and work on individual pieces. Most new heaters have gone away from this. They make it virtually impossible to work on their heaters, even going as far as pop-riviting them together to prevent access.The only reason I say 4.9 instead of 5 stars is because of the aluminum fitting at the bottom. Come on guys.charge and extra $1 and provide a cast or brass fitting. BE CAREFUL not to crack the aluminum fitting that's provided.All in all I'm very happy with these and will be ordering more.