How to vent a bathroom fan through the wall: a step by step elaborate discussion for you

How to vent a bathroom fan through the wall: a step by step elaborate discussion for you

After using once a bathroom, however, people experience foggy windows and steamy mirrors. Installing a bathroom fan is a supper solution to get rid of this problem. There are no other options but the bathroom fan to expel the moisture-laden air from your bathroom. You have to elaborate on how to vent a bathroom fan through the wall if you want to install a bathroom fan by yourself.

If your bathroom is using a bathroom fan and facing these weird problems, vent a fan and use a fresh restroom. However, now I am stating some essential steps in the following parts for your help. That will ease your hard labor to do the bathroom fan installation process with accuracy. So you have to keep reading the article with full attention.

An elaborate step by step negotiation on How to Vent a Bathroom Fan through the Wall for your better Understanding:

Before starting the whole process of ventilating the bathroom fan through a wall, you have to follow these systematic ways. Have a look at the whole process,

  • First, you have to draw a rough mark where you want to place the fan.
  • Drill some holes as a sample of the installing area.
  • Make a rectangular-shaped outline by using a layout square onto the ceiling.
  • Cut the ceiling through the lines.
  • Now, cut a hole through the sidewall from the external area and place the fan there.
  • Now install the wall cup in the back of the sidewall to connect the wirings.

Now I am explaining the points in detail. I will describe the process journey step by step. So let’s begin to read. 

Step-1: Calculate the Expected Dan’s Size

A bathroom without a bathroom fan is likely to be quite hot inside. So, you should install a proper size fan in the bathroom. However, to calculate the appropriate size compared to the dimension of the bathroom, you can use the ‘CFM rating formula.’ This ‘CFM’ formula is determined by the fan’s air moving ability (cubic feet per minute). Vent fans are rated by it.

You can determine which size fan you should buy by multiplying the room square footage by 1.1. For instance, a 110 CFM-rated fan is demanded a 100-square foot bath.

Fans are also rated by sones. The range of vent fans is from at least 0.5 sones up to 6.0 sones. Do not worry about this one measurement. You will get a notification about the sone rating and CFM ratings written on the vent fan’s box.

Bathroom fan
bathroom fan light combo

Step-2: Drill Some Holes

After calculating the bath dimension and the fan’s size, you may now be able to buy your needed one. Now draw some marks on the ceiling and drill a hole to refer to the place for cutting. However, use a drill machine to do so. For a better result from a vent fan, choose to install the vent fan between the shower and toilet. That will provide you more effective results than you expect.

You can use a long spade, 3/8 inches in diameter, to bore the reference throughout the ceiling and onto the attic. Then climb up into the attic to clear insulating materials from the hole. At this point, use the reference hole to position the fan in an exact place. Make sure to put the vent fan amidst the two joints next to the reference hole. And be careful if there are any pipes or other obstructions.

Step-3: Make a Shape of Cutting on The Ceiling

Now go back into the bathroom. And measure the dimension of your vent fan’s intake port to visualize the size of the hole cutting on the ceiling. Using a layout square, you can mark up a rectangular outline to intake port onto the contour. Then, cut through the procedures. 

Step-4: Now cut out the rectangular-shaped hole

Use a comfortable machine to cut out the roof. Do it gently. When you finish the cutting, hold the piece of cutting with your hand to support it; otherwise, it will fall onto the floor. Consequently, the floor will be messed up, and something unpleasant happens. Make sure to wear spectacles while cutting the roof.

Step-5: Place the Vent Fan

Now exit the restroom & ascend to the upstairs. 
Make the necessary preparations to connect the exhaust fan. Attach a 4 inch, 90-degree duct elbow to the output terminal on the exhaust fan’s casing edge to accomplish this. Then attach a cable connector. Place the vent fan permanently in the center of the ceiling hole and between the two joists. Use some foil duct tape not to deteriorate within a short time. It will cover the rest.

Step-6: Installing the Wall Cup and Attaching the Duct

Now install the wall cup in the attic. Then attach it with the exhaust duct. Again use foil duct tape with a 12 inches long connector duct. Tight the wall cap into the duct hole along with the house siding. Use a foam rubber gasket to fulfill with any spaces where the wall cup does not touch the siding. After some while, remove the wall cup and use silicone adhesive to the siding. After drying the adhesive, use some screws to tighten with the steel.

Step-7: Connect the wirings

After screwing the siding with 1.5 inches screw, you should pay attention to wirings. If you have previous experience of wiring connecting tasks, it will be great to do it yourself. However, if you do not know, then an electrician can come to your help to join the wires. However, an electrician is an expert in doing electrical activities.
Otherwise, if you do the process following my writing, it will be tricky. Then wrap them, the bare copper wires, and ground them inside the housing. And then tight them.

At the last stage, when you find you have done all the works, attach the grille gently. To attach it, you should raise the blower motor and push its plug into the receptacle inside the housing. Make sure the screws were removed from the engine earlier. Now push up the plastic grill closed to the ceiling. Push it up until it is tight.

Bathroom fan

Final Verdict:

We placed all our knowledge about and ideas on how to vent a bathroom fan through the wall in the above discussion. After finishing this whole article, we believe you will be able to do this task with ease. Moreover, this is an architectural phenomenon, so there is a chance to add and reduce any approaches. So, try the instructions as mentioned- earlier to do the task with ease.
Nevertheless, it would not change the primary system; a few changes may be happening. So, save your money by installing your bathroom fan by yourself by following these steps as mentioned above. Use the bathroom without odors and a foggy outlook and enjoy life. Expel the moist air from your bathroom and get free from growing mold and mildew. 



Write a comment