Calculate Solar Heat Gain Through Windows Past' title='Calculate Solar Heat Gain Through Windows Past' />How to Calculate Attic Vent Area Needed When Adding Soffit Vents. Adding attic soffit vents under roof eaves. Keeping your attic cooler in the summer can increase the life of the roof as well as saving money on your air conditioning bill. To effectively cool the attic, outside air needs to circulate through it. One solution is to use the natural circulation caused by hot air rising to bring fresh air into the attic through soffit vents under the eaves, then expel the hot air through ridge or gable vents near the peak of the roof. The general rule of thumb on the amount of total attic vent space needed is to have at least one square foot of vent space for every 1. Get your weekly DIY fix with our customized newsletter. Thanks Youve been added to our list. Good stuff is on its way We see the questions all the time people wondering What will it take to run an RV air conditioner off of solar power We get asked for advice in email regularly. A blog about Impact windows and doors for hurricane protection. Burn Fat Gain Muscle Diet Plan Phytogenix Ultimate Fat Burner Green Tea Burn Fat Gain Muscle Diet Plan Fat Burner For Men Over 40 What Is The Target Heart Rate To. Ideally, half the vents should be located in the soffit at the bottom of the roof and half in gable or ridge vents near the top to allow for natural circulation of air through the attic. To find out how many soffit vents you need to install Calculate the total vent area needed Multiply the length of the attic times the width in feet to find the attic area, then divide by 1. Example a 5. 0 x 3. Calculate the soffit vent area needed Divide the total vent area by two to determine the soffit vent area. Vent space 2 sq. Five Basic Elements of Passive Solar Design U. S. DOE, This article discusses the Five Key Elements of Passive Solar Design and links to additional passive solar. We have told you not to stare at the Sun today. We have told you to use safety glasses. We have tried so very hard, and we are so very tired. Ubiquitous Energy and Michigan State University researchers have created a fully transparent solar concentrator, which could turn any window or. Example 1. 0 sq. Calculate the area of each vent When known, use the net free area supplied by the manufacturer of the venting you will be using, which takes into account the actual open area of the vent rather than the total vent size. For square or rectangular vents, muliply the length times width of the vent space in inches, then divide by 1. Example a 6 x 1. For round vents, multiply the radius of the vent half the diameter times itself squared, then multiply the total by 3. Example a 6 diameter vent would have a radius of 3, multiplied times itself would equal 9, times pi 3. Determine the number of soffit vents needed Divide the total soffit vent area by the area of each vent. Example 5 sq. ft. Space the soffit vents evenly around the bottom of the low sides of your roof. There are several different types of soffit vents available including continuous, circular, and perforated vents made for vinyl siding. Well discuss the easiest to install, standard 8 x 1. First mark off the space where you want the soffit vents to go, spacing them so they fit between joists or rafters. Cut the hole slightly smaller than the vent itself with a circular saw or a saber saw. Dont forget to wear eye protection. Check to be sure that the hole vents into the attic and isnt blocked by insulation or other obstructions. Screw or nail the vent into place. The fresh air the soffit vents draw in should be expelled near the peak of the attic through vents in the gables, ridge vents in the roof, wind turbines, or power vent fans. Further Information. Microsoft Forefront Client Security Upgrade Projects.