If you don’t want to fiddle with sticking something on your frame, you may use draft stoppers or draft excluders. You can simply place them in front of the threshold and just remove them easily when spring finally arrives.
Many of us fall into the trap of turning up the heater to the maximum in order to get a quick wave of good temperature. If we can be a bit rational and patient keeping the heater at a reasonable 68° for eight hours during the day, we can get a lot better results with 15% less to pay.
You Are Paying Double For Your Heating Unless You Know These Tricks