Thanks Robin
It burns natural gas. I have never lost gas. The gas company has there own back up power for delivery. I was worried about CO with a ventless heater. The newer models have low oxygen sensors to prevent CO emissions. I bought the Dinaglow becuse it can be scaled back. That way I can limit the CO to the minimum. I did not need it at all this winter. Last winter a truck hit a pole HV went into the low voltage system and we were without power for many hours. I used my oven to supply some heat. I guess that I have to much time on my hands since retirement. https://www.walmart.com/ip/Dyna-Glo-30-000-BTU-Natural-Gas-Infrared-Vent-Free-Wall-Heater/46796376?wmlspartner=wlpa&selectedSellerId=0&adid=22222222227035538282&wl0=&wl1=g&wl2=c&wl3=96706241448&wl4=aud-430887228898:pla-134478545328&wl5=1024976&wl6=&wl7=9006215&wl8=&wl9=pla&wl10=8175035&wl11=online&wl12=46796376&veh=sem&gclid=Cj0KCQiAwP3yBRCkARIsAABGiPrwBxqbg8gfbcQDBMAS2vIvwQpCIFoYaCgIboLmch7QiWpMvd40V_4aAiCpEALw_wcB Frank Znidarsic