There are a lot of small ways you can improve the comfort of your home, & it kind of depends on what you want.
For some, they want their loft to look comfortable, & so they add all kinds of nice looking furniture.
For me, I want our loft to not only look comfortable, however to feel comfortable too. And there are many things I guess I can improve to get that. One is blatantly heating & a/c, and can a loft absolutely be comfortable without Heating & Air Conditioning? Maybe in a perfect climate, however in most locations, the answer is no. So I am constantly making sure I have our heating & air conditioning unit looked at twice a year, once in the Spring & once in the fall, & I make sure to change our HEPA filters out every many months, & I even make sure to clean the actual central Heating & Air Conditioning unit every now & then too. Naturally, with all of this great care, I have had nothing however good fortune with the actual a/c machine, & I haven’t any problems with it. Something else that I feel is forgotten about, is your air quality. If you have bad air quality, your loft is not going to be very comfortable, you may have dust sensitivities or may feel sickly a lot, & that is because the indoor air quality is important for good health. Apart from having a whole loft media media media air cleaner to help cleanse the air, one of the other things I do for a comfortable loft is having Heating & Air Conditioning HVAC duct cleaning every year or multiple.