I purchased two of these 1800w heaters to replace two old 1300w quartz patio heaters as one packed up. there is no comparison whatsoever. even if I stand 1m in front of them I can barley feel heat due to cold air between. I had them professionally installed to a time switch so the moulded plug needed removing. because of this primrose will not accept a return which is fair enough but no use to me as a patio heater so there going in the bin. I've now purchased one proper 1500w patio heater and wow, I have heat OUTDOORS again. I think they are meant for indoor use to heat a room. save your money and buy a proper quartz patio heater.