THE SHENANDOAH R-77E WOOD HEATER FEATURE HEAVY GAUGE METAL CONSTRUCTION AND BI-METAL THERMOSTAT WICH AUTOMATICALLY CONTROLS HEAT OUTPUT.LARGE LOADING DOOR ENABLES EASY LOADING AND REFRACTORY LINING ENHANCES EVEN BURNING AND HEAT RETENTION.ASH REMOVAL IS ACCOMPLISHED BY SHAKER GRATE FOR SIFTING AND LARGE ASH PAN.THE R77 SIZE MAKES IT POSSIBLE TO HEAT LARGE AREAS WITHOUT FREQUENT LOADING AND WILL ACCEPT 26" WOOD