A Guide To exhaust fans

A Guide To exhaust fans

Most new homes today are very isolated and virtually airtight. While this is great, as well as energy costs by far more economical, is the downside of well insulated houses to poor indoor air quality. Because the windows and doors are kept closed during the day Typically, moisture, stale air and bring the contaminants and pathogens can be spread inside the home and leads to several problems, such as mold, poor health, ruined furniture, peeling paint, etc. is becauseIt 'important that at every step to improve the quality of your indoor air that can be achieved by mechanical ventilation.

A great way to ventilate the house thoroughly, efficiently and economically, is to install exhaust fans in your home. This article explains the exhaust fans, their different types, how to choose the best for your home, and also the advantages of vacuum cleaners.

What are the exhaust fans

An exhaust fan is a mechanical ventilationDevice, the air stale and impure pull from your home and bring the fresh air, improving indoor air quality helps. Vacuum cleaners are usually removed effectively to the outside of your home air, by poor indoor air from the living room.

Types of vacuums

Vacuum cleaners are divided into several types, depending mainly on the nature of the holder and the place where you need to install the fans. The different types are as follows:

1 CeilingMounted exhaust fans: As the name suggests, are those ceiling fans that are installed in the ceiling. Fans that expel stale air from the house through the roof. The fan is a pipe, the vent is exhausted to the outside through an exterior of the house, such as a soffit vent cap or roof drainage connected.

2 In line Exhaust Fans: Unlike ceiling fans that are installed directly into the ceiling, in-line fans are typically mounted between the tubes, hence the name line. Fan For example, if you were in an area that no distance or space for a ceiling-mounted scarifier, using fans to ventilate the online areas. The fan would be placed between the tubes and the stale air that travel through the lines and eventually driven from home. Since in-line fans are not directly mounted on the ceiling are very quiet. When installing a fan in the line to reduce the noise, we recommend using a block flexChannel, which at least eight feet in length taken from the opening in the ceiling, in-line fan.

Online vacuum cleaners are ideal for areas they want to demanding or rooms where you do not, or can not install the exhaust fan directly. Since these types of fans are installed in remote areas, are also known as a remote control fans mounted. Online vacuum cleaners can be either single-port (exhausting from a single area) or multi-port (exhausting from multiple areas).

3 WallExhaust Fans: These fans are installed on the walls. Because they are on the outside walls of the house and not installed on interior walls, the foul air is necessary in a direct way on the outside of your house and therefore no system of channels is the installation of these fans.

The combination exhaust fan 4: Exhaust fans are available as combination units. You can choose from a range of light combination, where the exhaust fan provides light and heat or light-fan combination, for whichget a warm, light and fan in one device.

5 External Remote mounted exhaust fans: exhaust fans, while most others are installed in the house, and press out air consumed, externally mounted fans are installed outside the home and remote disconnect unused room instead of pushing air out. The main advantage of these fans that count, but I'm strong, remains the most noise out of the house.

6 stove exhaust fans: These fans aremounted inside the exhaust hood above the stove. These fans will not only help to rid your kitchen of stale air, but also help dissipate odors and reduce the humidity in your kitchen area.

These different types of fans for your home including complete Intermittent local ventilation and ventilation for bathrooms, kitchens, drying room can be used, the whole house continuous ventilation throughout the house, and to extract hard-to-air spaces such as crawl spaces, attics andBasements.

The advantages of vacuum cleaners

Vacuum cleaners are very effective in the ventilation of your home and living spaces. Without adequate ventilation, the air in your house full of harmful pollutants and pathogens that cause diseases.

Pollutants such as pesticides, toxic gases, smoke, pet dander, lead, asbestos, dust mites, paint fumes, grease gets into the air through everyday activities such as cooking, the smoke released by burning fuel, bathroom, restructuring, etc.In addition to these polluting activities such as bathing, cooking and washing and release excess moisture in the air and make the air very humid. If not properly vented, these additional pollutants and humidity has increased significantly reduce indoor air quality, causing various problems such as:

Health problems such as asthma, allergies, nosebleeds, skin rashes, headaches, nausea and other respiratory ailments. According to the EnvironmentalProtection Agency, a large percentage of over 20 million annual incidence of asthma in the U.S. alone due to poor indoor air quality.

Split mobile deformed and rot because of too much moisture.

Cracking and peeling paint on the walls.

The fungus, and mold spores, which in turn lead to serious health problems.

So, using fans to ventilate your home efficiently and completely, thereby improving indoor air quality can liberate themselves andYour home for all these problems.

Recommended sizing of vacuum cleaners

To ventilate your home effectively, it is important that the exhaust fan the ability to exploit the space provided is complete. To ensure this, you need the right size fan for your needs. Here is a look at how the size of vacuum cleaners properly.

1 Position the hood and change of air per hour:

Where you want to install the exhaust fan has a direct impact on its size. AsHousehold Ventilation Institute (HVI), various locations in the home require a different air change per hour (ACH) to ventilate. Here are the ACH HVI recommended demands.

8 ACH for bathrooms

15 ACH for kitchens

6 ACH for rooms except bathroom and kitchen

ACH refers to the number of times that the air in one hour should be completely changed. This means an 8 ACH recommended for bathroom exhaust fans should be able to fullyChange the air in the bathroom 8 times per hour.

All fans are classified in the CFM, which refers to cubic feet per minute. To determine how large an exhaust fan is required (in other words, assessment of CFM fan) here, you have to do.

Bathroom exhaust fan sizing:

First, measure the dimensions (length, width and height) of space and then calculate the volume of air in the room by multiplying these three numbers. For example, if the bathroom isSize of 6 x 10 x 8, then the air volume is 480 cubic meters in the bathroom. Therefore, the exhaust fan ventilated to 480 cubic meters of air to reach an ACH. But the ACH is recommended for bathrooms because the fan is actually needed 8 to 480 x 8 cubic meters, which corresponds to 3840 cubic meters will be airing in 1 hour. Fan Ratings per minute, so by dividing 3840 by 60, you can select the desired CFM rating for the fan, which in this case to reach 64

An easier way to determine theCFM rating for bathroom exhaust fans, just multiply the length by the width of the bathroom. 1 for each square meter of surface, you need 1 CFM. So in the example above, the field would be 6 x 10 = 60, recommended size to 60 CFM fan would.

However, if the bathroom is over 100 square meters, you must add the various devices in the bathroom in order to obtain the desired CFM rating. The CFM is recommended for various devices:

· Shower - 50CFM

· WC - 50 CFM

· Bathtub - 50 CFM

· Bath Whirlpool - 100 CFM

So, if the bathroom is over 100 square meters and has a toilet and shower, you need a fan with 100 CFM rating. If a bathtub is also the CFM rating will be increased to 150 and so on.

Sizing of the kitchen exhaust fans:

When you select a fan for the kitchen need to consider the position you are cooking the foodArea (except hood) or the size and location of the hood, if there is one. Here are the recommended CFM ratings kitchen hood exhaust fans:

In general, for every 10,000 BTU in the area, we recommend a minimum of 100 CFM. So, if the object is estimated at 50,000 BTU, who considers himself a fan with a minimum of 500 CFM.

2 Understanding and measuring the static pressure equivalent pipe length:

When you select a fan that is not opendirectly to the outside, but in a tube, it is important that the capacity exhaust fan, exhaust air through the channel and, finally, to move outward. Here we must first understand what is the static pressure and equivalent pipe length.

Static pressure: in each channel there is a constant pressure at any time from all directions. If a vacuum cleaner air moves through the duct, the air resistance of the counter-pressure, which is known as staticPressure. Thus, the exhaust system, the ability to overcome the static pressure in the channel in order to effectively utilize the exhaust air to the outside of your home. This can be done by calculating the equivalent length of the channel tube.

Calculating equivalent channel length (EDL): Just measure the length of a channel is not enough to know, how to overcome the static pressure is a fan. The channels have one or more arcs, curves, or wall plugs that are added to the static pressure in a channel.To have run into that channel and do not run the current channel to correctly calculate the size of a fan.

Perform the static pressure in a channel varies depending on the material of the channel, the number of twists and turns, the outside wall, junction boxes and hoods, etc. Following are the default values ​​for the components of different channels.

Smooth metal duct: actual length of the duct x 1

Aluminum tube flexible: actual length of the duct x 1.25 (for 4 "diameter pipe)

Effective length of the duct x 1.50(For 6 "diameter pipe)

Insulated Flex channel: effective length of the duct x 1.50 (for 4 "diameter pipe)

Effective length of the duct x 2.00 (for 6 "diameter pipe)

Wall caps and roof caps: 30 feet for each cap (for 4 "diameter pipe)

40 feet for each cap (for 6 "diameter pipe)

Bends and turns: for every 15 meters (for 4 "diameter pipe)

20 feet each (for 6 "diameter pipe)

With the above values, it is possible to calculate the equivalent length of straight pipe that has a fanovercome to stale air outside your house and the static pressure to enforce them effectively.

Help ventilation is a service provided by RE Williams Cont. Inc. Please note that different building codes and local regulations vary from region to region, may also change;. Therefore, RE Williams Cont Inc. assumes no responsibility for omissions, errors or the result of home improvement project. You should always use caution, follow current codes and theirRegulations, and in case of doubt on any mechanism can consult a license.

For a complete line of home ventilation solutions can be found on our website at
www.REWCI.com

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