-75-200,000 BTU’s -variable settings control -push to start -no electricity required -commercial/construction grade (it’s on the pictured label, not just my opinion) This heater generates some serious heat! It’s been used 2 winter seasons @ many masonry construction sites and has never disappointed. That’s also the reason it’s dirty and dusty. Mainly because of the days when tuck pointing was done, when grinding old mortar and cutting bricks generated a lot of dust. I’ve used it to work in my garage but it’s almost overkill. -I do have an optional 100lbs* capacity tank that can be purchased SEPARATELY. *I’m not 100% sure if it’s 100lbs but it’s about 4ft tall. It’s almost up to my neck.