I was pretty shocked when I went out plus bought a portable space heating system for my home office last winter.
I had portable space heating systems around myself and others growing up plus they were nowhere near as powerful as these current space heating systems today are! Back when, the portable space heating systems were made of metal plus occasionally not so portable.
While today, the portable space heating systems are made of some kind of heat resistant plastic, very lightweight, plus wow, can they heat up a giant home office in minutes! The heat from the current portable space heating system I bought is so powerful, you truly have to be careful on where you set the little dial temperature control that is on the front of it. When I first bought this portable space heater, the very first night I used it I nearly killed myself. I woke up feeling like I was in AZ in the dead middle of summer time outside in the blazing sun! I had the portable space heating system set on 79 degrees plus the thing heated up my room to almost 1 hundred! At least that is what it felt like. I found that because these portable space heating systems today are so powerful, the best way to use them is to turn them on full blast for 3 mins to heat the room up. Then turn it off for a while, then turn the portable space heating system back on plus set the side temperature control no higher than 60 degrees. This will know it or not get the room to just the right temperature on a cold Wintertide morning or night to around a perfect 75 degrees.