November 9, 2022
How many roof Turbines do I need: Are you aware that several factors determine the appropriate number of turbines you need? Yes, these factors include, but are not limited to the type and size of the building. Roof turbines are mainly installed at the highest point on the roof’s surface since they utilize wind power turbines to inhale all the hot air and moisture out of your attic.
Remember, installing the appropriate number of turbines is the only sure way of ensuring a balanced and effective system. Besides, it provides your house has a continuous supply of fresh and cold air.
It is important to note that several vital calculations are vital to accurately determine the number of turbines required during a roofing project. However, kindly note that this information is just an example since the precise number of turbine units needed depends on overall dimensions and your roof’s shape.
How to the calculation for the required number of roof turbines in a standard roof type.
The first most important thing to understand is the surface area of the roof you intend to install the turbines on. This helps you calculate how many turbines can fit in that particular surface area. Below is a guide that you can follow to install roof turbines on some of the most common roof pitches and types. Calculation of the right number of intake and exhaust vents will ensure your system is effective throughout the year.
The most crucial step while determining the number of vents needed for your roof is calculating the necessary NFA (Net Free Area).
Most codes embrace the 1/300 criteria for the least residential attic ventilation proposals. It means that one square foot of ventilation space is required in every 300 square feet of an enclosed attic area.
Take, for example. Assume your home has an attic floor space measuring 2000 square feet. The first step is to divide 2000/ 300= 6.67. This means 6.67 square feet is needed for your attic ventilation.
Now that you need a balanced system, you will have to divide the 6.67 by 2 to get 3.33, of which one of the 3.33 square feet is for the intake attic ventilation while the other 3.33 square feet is for the exhaust attic ventilation.
You will be required to convert the square feet you got above into square inches since the vents are typically graded in square inches.
This is achieved by multiplying the square feet by 144 so that in the above case, you get 3.33 by 144; you get 480 square inches. In simple terms, 480 square inches are required for intake attic ventilation space and a similar exhaust space.
Once you determine the appropriate NFA amount and select the correct vents type, you can now quickly establish the right number of vents needed. It, therefore, means dividing the required NFA by your turbine NFA rating. For instance, in the above example of 2000 square feet, we determined square inch for intake and exhaust vents is 480 square inches for every section.
Assuming you buy a turbine with an NFA of 50 square inches, then the total number of turbines required is 480/50 = 9.6, which is approximately ten exhaust vents.
Since you will need more intake vents that the exhaust vents, we shall take the given amount of exhaust attained by the Deck-Air NFA rating, for instance, to demimonde the required Deck-Air number, divide the 500/36 =13.9 approximately 14 intake vents.
The surface area of the roof to be ventilated– Number of vents required
- 0-90 m2————————————– 3
- 90-140 m2 ———————————– 6
- 140-185 m2 ———————————–9
- 185-230 m2 ———————————–12
Below is an illustration of how to determine the ventilation of your home interiors. These calculations are set according to m3/h since they use, and the building type determines the appropriate air exchange frequency.
For instance, a frequency of 2-3x /hour is recommended for an office setting or living rooms. Similarly, in standard-duty industrial spaces, the frequency can escalate up to 8-12x /hour.
For instance, if your attic area is about 450 square feet, you need to install three vents if you choose to leave the attic area’s 150 square feet. This implies you leave 1 square foot of your turbine area per 150 square feet. The Net free site marks the appropriate amount of space that each roof vent should cover. Always ensure to provide the same distribution distance between the exhaust and intake turbines.
The only exemption from installing more turbines on your attic is when your roof slope is over 6:12 since it means that your attic has more volume relative to the real square footage.
This implies that you should install more roof turbines than one in every 150 square feet. Note that balance plays a significant role in creating an able attic ventilation system. A well-designed ventilation system should ensure continuous streaming of fresh air through its attic space, thus fighting off moisture and heat.
Features to consider in your roof turbines before purchasing.
Are they eco-friendly? Ensure your roof turbines do not cause environmental pollution, such as noise pollution during and after disposing of them after their useful service life. Besides, pick cost-effective turbines. Yes, ensure your roof turbines offer a low-cost roof space ventilation solution. For instance, ensure you choose roof turbines that are not only electrical power efficiently but also affordable.
Remember, high prices, don’t always guarantee high quality to check for your gadget’s warranty. For instance, a high-quality rood turbine should include a lifetime warranty if used for residential home ventilation projects and at least 15 years of warranty when used for commercial building ventilation purposes.
Why is it so important to install roof turbines?
The first most important thing to understand before answering this question is knowing what the roof turbines and their purposes are. Typically, a roof turbine is a fixture installed at the top of the roofs that acts as a means of draining hot air.
They play a critical role in maintaining a vigorous roof, attic, and the overall home. Remember, your attic and roof size determine the number of roof turbines needs on your ceilings. Note that once you allow free airflow, particularly within the attic, roof turbines simultaneously play critical roles. This enhanced ventilation will result in:
- Prevention of moisture buildup in your attic. This is particularly important since it prevents the formation of mildew and mold.
- Roof turbines also prevent the accumulation of dangerous icicles and ice dams, especially during the winter.
- Moderation of the attic temperature enhances your home’s energy efficiency, hence lowering the utility bills annually.
Types of vents
- Gable Vents. These vents are mainly attached to gables rather than on the roofs. They are available in several shapes and sizes, such as medium to large triangles.
- Ridge vents. Mainly installed along the roof edges. Due to their narrowness, they are considered the best exhaust vents.
- Turbine Vents. Positioned at the top of the surface of the roof so that they use the wind power to suck hot air from the attic
What size roof turbine do I need for my home’s roof?
Remember, the primary purpose of the turbine ventilator is to increase the airflow within your attic. A typical roof turbine ventilator only requires wind power to function. These turbines aren’t of the same size-fits-all but are available in various sizes and styles meant for different situations. Therefore, it is essential to ensure you have a proper size turbine for maximizing your attic airflow. This means that installing a relatively smaller or bigger turbine may not serve your intended purpose accordingly.
Below are some of the most critical tips that can help you pick the right size of your roof turbine today.
Consider the city codes.
The first most important thing to think about is visiting the city building department, which will help you get the newest about the most appropriate home venting codes.
Although most home venting policies demand roughly one foot of vent space in every 150 feet of the attic area, you must understand the specific city code requirements in your area. Note that installing a vent that doesn’t match your city code will malfunction, and the only possible solution will be to uninstall it, thus wasting your time and money.
How to calculate for the right size of your roof turbines?
The most fantastic thing about roof turbines is that some mathematical equations govern everything. These equations help determine the right size of the venting required for your roof.
For instance, the first most crucial thing is choosing your entire attic square footage and then sketching it onto a piece of graph paper. Determine your fair footage, number, and then multiply your results by 144.
It helps you get your measurement in square inches rather than square feet. Divide the answer you get above by 300.
This is because one vent should be installed at every 300 square feet of your attic area. The quotient is the right size of the ventilators needed in your attic. The quotient is the right size of the required ventilators for your attic, particularly if it has vapor barriers; otherwise, it should be one vent per 150 square feet.