The Dayton TC2000VA has a durable and compact design. Its single control knob operation with enclosed components makes it extremely easy to use. Plus because it's so lightweight, it is extremely easy to service. The patented pilotless burner system eliminates nuisance outages and its Piezo ignition operation makes lighting the heater a snap. Covering up to 4,700 sq. ft. the Dayton TC2000VA liquid propane gas fired heater is way too good to pass up so purchase one today!These units require 100 lb. cylinder or larger.