I just installed an Eco-Choice Cab50 in my large, well insulated workshop. I haven't fired it up yet, as we're expecting to be in the 60's tomorrow. (and snow by Wednesday!) I want to add a few wall clamps to the Duravent and eventually get a wifi connected thermostat once reliability has been proven. Its technically a little undersized for the space, but the building is well insulated and should take the chill off and enable me to work on projects through the winter.