O hagin vents are completely passive reducing energy costs related to heating and cooling.
Ohagin roof vents calculator.
Today o hagin has local and national testing approvals.
Calculate or enter the square footage of the attic or area to be vented.
Ventilation protects attic insulation and rafter cavities from moisture thereby reducing the risk of mold and dry rot.
Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.
From its founding roots as a roofing company over 40 years ago o hagin has grown into a nationally recognized designer and producer of top quality state of the art attic ventilation solutions.
This strategic high and low placement of o hagin vents allows the balanced system to fully optimize both wind and thermal effects to provide superior passive ventilation throughout the attic.
Removal of trapped gases.
For balanced ventilation an equal amount of intake vent area net free area should also be installed.
Additionally placement of o hagin vents both high and low should provide an equal balanced rate of ventilation performance in each area.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
Use avp s roof vent calculator to determine the number and size of exhaust vents you will need.
Extending the roof s life.
Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.
For the complete pdf version of the installation instructions in english and in spanish please follow one of the links below.
Quick vent calculation guide for o hagin s standard weathermaster and fire ice attic vents there are two important pieces of information required in order to calculate the adequate number of vents required for your project.
Proper attic ventilation facilitates the removal of hot.
