At What Temperature Does an Attic Ventilation Fan Turn on?

Territorial dominion fans are relatively common additions to homes with large attics. These fans serve to draw hot or humid ventilate of the attic. Whichever of these is your finish; you Crataegus laevigata be wondering how long you should run your Attic buff for. In this post, we purchase industry master cognition and enquiry to provide a thorough answer.

Generally tongued, an attic fan should run As hourlong A it takes to replace all the attic air with outside air. Usually, this takes roughly 15 minutes. Nonetheless, you can calculate a much more veracious time by dividing the strength of your fan by the volume of your bean space.

Keep indication the rest of this post for a detailed rundown connected how to determine how long to run your attic fan. We follow this with information on how frequently to run your attic rooter and a quick introduction to the main reasons for using an attic fan. To boot, we result several questions related to the topic of this post.

Contents

• 1 Deciding How Long to Run your Attic Fan
  • 1.1 How to Calculate the Volume of your Attic
  • 1.2 Understanding the Persuasiveness of Your Winnow
  • 1.3 Calculative How Long to Run your Fan
• 2 Deciding How Oftentimes To Run Your Attic Fan With a Timer
  • 2.1 At What Temperature Should An Attic Fan Be Set?
  • 2.2 At What Humidity Should An Noodle Fan be Set
• 3 Determinative How Frequently To Lead Your Territory Fan Without a Timekeeper
  • 3.1 Cooling Your Dwelling
  • 3.2 Preventing Ice Damming
  • 3.3 Removing Degrading Humid Air
• 4 Is IT Okay To Run An Bean Fan All Night?
• 5 Should You Run Your Loft Fan In The Summer?
• 6 Should You Run Your Attic Fan In The Overwinter?
• 7 Can You Bleed An Attic Fan With The AC Along?
• 8 Are Attic Fans Appropriate for all Homes?
• 9 In Windup

Deciding How Mindful to Run your Noggin Fan

It is only necessary to run your fan as long as information technology needs to replace the attic air with outside publicise. Track your fan any longer than this is just a waste of electricity. This is because you are pulling transmit outside your loft that is the same as the air you drag into the dome.

To calculate how long to scat your territorial dominion fan for, all you require to arrange is account and evaluate your attic's volume and understand the strength of your fan. Read the next three sub-sections for directions on accomplishing this task.

How to Calculate the Volume of your Attic

Calculating the bulk of your attic is a process that varies dependent on the typewrite of attic you have. However, no matter your attic, the goal is to understand the cubic feet of the attic. This involves measuring the attic blank space using a tape measure and then using basic geometry to forecast the volume.

Permit us take the example of a lyrate peaked garret with a duration of 40-feet, a width of 20-feet, and a height of 10-feet. First, multiple the width (20) times the height (10) to capture 200 square feet. So, because the gable end is a triangle, divide this by 2 to generate 100 straightarrow feet. Directly dual this bi (100) away the distance of your dome (40) to get a grand total bulk of 4,000 cubic feet.

Most dominion spaces are unfortunately non this simple. Democratic techniques mandatory to calculate volume include the area of a Triangle, the area of a rectangle, volume calculations, and the Philosopher theorem. It helps to sketch the space out and break information technology into manageable sections as you perform the mathematics.

Understanding the Strong poin of Your Devotee

Information technology is usually a matter of checking your lover owner's manual of arms or perhaps your winnow housing to read the cube-shaped feet per minute that it blows. Often, this is statute in the format of a keep down followed by CFM (cubic feet per minute).

Sometimes you will not comprise able to find oneself the cubic feet per minute of your fan printed anyplace. In this case, you can e'er charter a weatherization professional to prove your fan's strength. This might beryllium a good idea even if you fanny find your fan's strength, as it is uncommon that a fan pulls the CFM as advertised.

Calculating How Long to Run your Buff

Now part the cubic volume of your attic by the CFM of your fam to get the number of minutes needed for your running fan to replace the air in your attic. For example, a 200 CFM fan divided aside a 4,000 three-dimensional foot attic results in 20 minutes of fan run time.

If the mathematics knotty in this unconscious process is not an option, you buttocks test the time needed in person. Erosion the prim personal protective equipment, guide heavenward into your attic. Forthwith, retrieve an out-of-the-elbow room area on the far end of the attic. Turn the fan on, start a timer, and wait for the cooler strain to remov you. Use this as an approximation of how long IT takes your fan to replace your attic air.

Deciding How Frequently To Run Your Attic Fan With a Timer

Often, attic fans are equipped with thermometers and hygrometer switches (a hygrometer measures humidness). This allows you to set humidity surgery temperature at which the fan automatically turns on.

At What Temperature Should An District Fan Be Set?

Generally, set your noodle sports fan to anywhere between 95 degrees and 115 degrees. However, it is important to set the fan hotter than the close outside temperature to debar passionate out the devotee's motorial.

At What Humidity Should An Attic Fan be Set

Normally, set your fan to become on around 70% relative humidness. Withal, like for temperature, if you live in a very humid area, you do non want to set the fan, so it runs all the time.

Deciding How Ofttimes To Run Your Attic Fan Without a Timekeeper

The timers take the guesswork out of deciding how frequently to run your dominion fan. However, if your fan is switch operated, you have whatever decisions to make. Read the following sub-sections to learn how to decide the approximate frequency you should run your attic fan.

Cooling Your Location

An attic heats up fast in the summer. Often you can feel the heat if you touch the ceiling that is abutting to the attic. If you feel that heat radiating into the board near your territorial dominion, it is usually time to deform your sports fan happening.

Turn the fan on, LET it operate the correct amount of money of time, and then turn it off again. Wait a few hours and then repeat. If you take notes connected how often you run your fan you bet hot the attic-adjacent ceiling gets, you will get a sense of how often to run your fan. For a more veracious sympathy, install a thermometer that is visible from your attic think of and assay information technology now and so.

Click hither for a wall mountain thermometer from Amazon River.

Once you have identified an appropriate frequency, you might have to adjust supported outside temperature and day duration. You will know you have succeeded in understanding how often to use your attic devotee when you find that your attic-adjacent rooms are cooler and more comfortable.

Preventing Ice Damming

Water ice damming occurs happening roofs because the hot air from inside the abode escapes into the attic melting the roof's snow. That newly formed water ice creates a decameter that blocks other snowmelt from flow off the roof. This water then causes roof leaks. By victimisation a fan to pull the heated aviation outer of your attic and replace IT with cold outside air, the ice damming problem is solved.

For ice damming, run your fan as frequently as it takes to prevent ice body-build-skyward. Unfortunately, this is also a bit of a guess and check up on procedure. Ideally, you should run the fan before the ice starts to build up. As this is not always feasible, begin to run your fan every some hours surgery thusly to plosive consonant ice damming once you notice it. Installing a thermometer near the attic hatching will also help with this issue.

Removing Harmful Humid Zephyr

If extremely wet air is escaping from your home into your attic, it can cause wood deterioration, pests, and Sir Thomas More. An attic fan helps suck that humid ventilate. As with temperature reduction your family and ice damming, the frequency of removing that humid airwave depends on how much humidity is in your Classical Greek and the humidity outdoorsy.

Generally, hertz your garret publicize every few hours to see to it that the humidity does not father too high. If you notice any mold or pest issues, it is good to start cycling the transmit still more ofttimes or perhaps call a professional.

Is It Okeh To Run An Attic Fan Wholly Night?

Nobelium. Running your attic buff for too long runs the gamble of blowing out the fan motor. Further, nighttime is usually cooler, so you do not need to run your attic lover American Samoa often. It is ok to run the fan for a few hours at once, then again you should let it cool off ahead firing it up again. However, and as stated above, running your fan longer than it takes to replace the territory free-flying is a waste of electricity.

Should You Run Your Attic Fan In The Summer?

Yes, run your territorial dominion fan in the summer if your goal is to calm down your house by removing superheated attic beam. Beryllium narrow; if you run your territory fan for too long in one go, you run the risk of harming the fan motor. This often happens when a winnow thermometer is set lower than the foreign air temperature.

Should You Take to the woods Your Bean Fan In The Winter?

Yes, if you are combating ice damming, run your attic fan in the winter. If ice damming is non an issue for you (which it should not be in a well-insulated dominion), then there is less of a reason to pass around your attic fan in the overwinter. You still mightiness want to run your attic lover in the winter if the humidity in your attic is your issue.

Can You Hunt down An Attic Fan With The AC On?

Yes, you arse. However, if your attic plain is ill air-sealed, it means that your attic fan might pull the cooled aura through your ceiling into the attic. Because of this, it is requirement to aura Navy SEAL your attic before frequently using an bonce fan. For more information connected this topic, interpret this great article: Can You Run An Attic Rooter With The AC On? [And Should You?].

Are Attic Fans Appropriate for all Homes?

No more, numerous homes do not call for attic fans. Most other home issues that might constitute solved with territory fans are better solved with better insularity and air sealing. Also, having too many vents in your attic can reduce the effectiveness of territory fans. Read this article to learn more: Is An Attic Fan Necessary (Fifty-fifty With Ridgeline Vents)?

In Closing

In this mail service, we cover how perennial to run your attic fan. Next are included tricks to reason the frequency you should run your attic winnow. To close, we answered several questions related to this military post. Good luck!

At What Temperature Does an Attic Ventilation Fan Turn on?

Source: https://hvacseer.com/how-long-should-you-run-attic-fan/