get you one of these bad boys https://www.amazon.com/Radiator-Adjustable-Programmable-Thermostat-Protection/dp/B08BJ5KNX7/ref=sr_1_122?crid=2CTA7E49JR2B3&keywords=radiator+heater&qid=1655313472&sprefix=radiator+heater%2Caps%2C132&sr=8-122
cheap and it will heat up an area just fine. I have a large one in a 900 sq ft loft with shitty insulation and even when it's 20 outside I'm toasty and comfortable. I have a tiny one that I stick in my tents in the winter if I'm germing or seedling and I love it