TEXAS A & M DID A STUDY & FOUND THE WHIRLYBIRD VENTS RELEASE ZERO HEAT WHILE MOVING. THERE IS NO WAY FOR THIS DESIGN TO "DRAW" HEAT OUT WHEN TURNING.
ANOTHER OPTION OR TWO IS RADIANT BARRIER PLACED OVER CEILING JOISTS. SEE
What Is Radiant Barrier Reflective Insulation?
Radiant barrier insulation is a reflective insulation system that offers a permanent way to reduce energy costs. Radiant barrier insulation systems reflect radiant heat energy instead of trying to absorb it. A pure aluminum radiant barrier reflective insulation is unaffected by humidity and will continue to perform at a consistent level no matter how humid it may be. A radiant barrier insulation system is a layer of foil facing an airspace and is installed in the envelope of a building.
Most people are familiar with traditional insulating materials such as fiberglass, cellulose, Styrofoam, and rock wool. These products use their ability to absorb or resist (slow down) convective and conductive heat transfer to insulate (R-value). A third, seldom discussed but dominant form of heat transfer exists: radiant heat transfer. What are the differences among the three forms of heat transfer?
Conductive: Direct contact. If you touch a pot on the stove, this is conductive heat transfer.
Convective: Steam, moisture. If you put your hand above a boiling pot, you will feel heat in the form of steam. This is convective heat transfer.
Radiant: Electromagnetic. Step outside on a sunny day and feel the sunís rays on your face. You are feeling radiant heat transfer. All objects above absolute zero (-459.7 degrees F.) emit infrared rays in a straight line in all directions.
A radiant barrier reflects radiant heat energy instead of trying to absorb it. What does this mean in your home or business? During the winter, 50-75% of heat loss through the ceiling/roofing system and 65-80% of heat loss through walls is radiant. In the summer, up to 93% of heat gain is radiant. If you are depending on R-value (resistance) alone to insulate against heat gain and loss, remember that thin layers of fiberglass are virtually transparent to radiant energy and are affected by changes in humidity (moisture levels). A 1-1/2% change in the moisture content of fiberglass insulation will result in a 36% decrease in performance (referenced from HVAC Manual 10.6; McGraw-Hill). A pure aluminum radiant barrier is unaffected by humidity and will continue to perform at a consistent level no matter how humid it may be.
Testing and Approvals
Building Officials and Code Administrators
International Conference of Building Officials
Southern Building Code Congress International
Metropolitan Dade County (FL) Building Code Compliance Dept.
United States Testing Company
Tennessee Valley Authority
Tennessee Technological University
State of California
Oak Ridge National Laboratory
Texas A & M University
NASA Quest > Aerospace Team Online 80% ||||||||||||||||||||
... thermal protection materials. An example of a thermal protection material
is the ceramic tile on the Shuttle Orbiter. It uses heat ... 2002-11-01
Technology Transfer Program - At Home with NASA 60% ||||||||||||||||||||
... Their NASA-derived Smart-House Radiant Barrier is designed to reflect away 95 percent
of the sun's radiant energy. Pretty cool! Back to "At Home With NASA". 2005-10-12
AT Technology Transfer Homepage 50% ||||||||||||||||||||
... As her alarm sounds, Amanda awakes refreshed and ready to face her busy day after
sleeping snugly in a home insulated with radiant barrier technology developed ... + Highlighted
Innovation (Jan/Feb 97) - Insulation 40% ||||||||||||||||||||
... Energy Q Radiant Barrier is the commercial name for the material, manufactured
and marketed by Tech 2000 LLC of Roswell, Georgia. ... 1997-02-01
OPTION # 2 IS A CERAMIC COATING OVER SHINGLES IN ANY COLOR MATCH.
THERE'S YOU SOME OPTIONS,
MONTY / FlatRoofExpert@aol.com