Firstly, ensure that the bathroom has a window that opens to the outside air, allowing fresh air to circulate in the room. Alternatively, an extractor fan can also do the trick – switch it on before taking a shower or bath, and leave it running for at least 15 minutes after finishing.
Install an extractor fan
Installing an extractor fan is the best and most traditional way to increase bathroom ventilation. Once you install an extractor fan, you will find a big difference in the temperature and dampness. The extractor fan will suck the damped air and through it outside.
Easiest thing to do is to buy a whole window fan that allows for air to either blow in (cool it down) or blow out (typically when no air flow is available you need to cool a room) and place it. Have it blow out the air when you shower.
Blinds, shutters, and curtains can all help deflect the sun when closed and therefore stop it from hitting the room directly. Even better are those bathroom-friendly choices including reflective blinds, black-out curtains, and tinted window film. These will all help to reduce the temperature of the bathroom.
Lay the cloth over the fan. As it blows the air out, it'll circulate through the cloth and the air will feel cooler. Make sure that the cloth cannot get caught on the fan in any way at all––if this is a possibility, don't use this method. Replace the cloth frequently, as they dry out.
In the bathroom, the air holds a lot of moisture when someone uses the shower or bath, while the room also contains a lot of cold surfaces such as tiles and mirrors. Taken with the fact that warm air holds more moisture than cold, this combination means that condensation is always going to be an issue in the bathroom.
There is no doubt that the exhaust fans in your home have an important job to do, but they can also suck warm heated air from your home and cause your heating bills to spike. Knowing how to use your exhaust fans properly could mean the difference between an unexpectedly high heating bill and a warm comfortable home.
Can a Bath Be Too Hot? While there are many opinions on what “too hot” means, your bath can reach a dangerous temperature. Water over 106° F (40° C) starts getting uncomfortable, and at 120° F (48° C) it can burn you.
Direction is also key: the fan should face inward, so it draws the cooler air into your abode and blows it in your direction. Try putting a separate window fan on the other side of your home as well, if you have a window there.
Install Exhaust Fan
This is one of the more straightforward bathroom renovations you can perform. An exhaust fan will help pull out dry air from the bathroom if turned on periodically and should be kept running when you shower so that the steam is pulled into the fan, keeping the bathroom surfaces dry.
This DampRid product will reduce damp and musty smells as well as prevent mold that grows in moist and humid conditions. The crystals will work better in a smaller closed off area with restricted airflow, like bathrooms, basements, closets, laundry rooms, RVs, etc.
Open the door/windows
One of the easiest things you can do is open the door and the window in the bathroom to help circulate air and move some of that moisture outside.
Uninsulated or long runs of ducts
Therefore, long runs of ducts and uninsulated ducts will leave rooms farther away from an AC much warmer. Conversely, rooms closer to the AC will be much cooler. Solutions: Fixing this problem could be as simple as adding insulation to your ducts.
Using bathroom fans to vent the hot air that gathers near the ceiling can help keep things cooler. For those with a second story, this can really help keep the upper floor cooler. I turn on my bathroom fans upstairs in the early evening hours. This helps vent the built-up heat of the day.