John Keeble/Getty Images For your safety, do not buy or use a space heater that is not recognized by a testing laboratory says the U.S. Department of Energy. An excellent way to check is to look for a UL certified label. Also, never leave a portable heater unattended. Models that shut off automatically can help you rest easy. If your home has a programmable thermostat and you have it set to a low nighttime temperature, program it to bring up the home temperature a full 15 to 30 minutes before you get up. That way, the bathroom will be warmed up by the time you make your way for your morning shower.   Bungoume/Getty Images  You can turn on the fan after you are leaving the bathroom after you are done showering in order to remove moisture that can cause mold and mildew. But this added moisture is not such a problem during winter months when it is quickly absorbed into the home’s very dry air. You can seal any window with inexpensive silicone caulk made for weatherizing. Your goal is to fill any gaps or holes around window frames.  Also, make sure nothing is blocking the heating source in your bathroom. “For example, if your hamper is directly in front of a heat vent, move it,” adds Mochelle. “For many of my clients, heated bathroom floors have increased their quality of life in winter,” says Katie Anderson, an interior design consultant based in San Francisco, California. “One easy fix is to incorporate warmer colors into your bathroom. Too often, people decorate their bathrooms in cool colors like white or baby blue. That’s great if you have a heated bathroom. But when your bathroom is cold, the cool colors will make it feel a lot colder. Some reds, yellows, and pinks can help you warm it up a little,” according to Linden. Combining warm colors like red and orange with warm lighting can create some visual heat. “Bathrooms feel better and more heated with bulbs that emit K2500 and CRI 90 or higher,” says Anderson. “The thicker, the better. In my bathroom, during winter I cover my entire bathroom floor with plush, washable rugs,” he says.   “Their oversized heads are designed to immerse you fully with water, like getting caught in a heavy downpour,” says John Mochelle an NYC architect.  “The trick is to install them directly overhead and not an angle,” adds Mochelle. That way, your entire body gets covered with hot water instead of just your front or backside."