SolarAttic PCS1, User Manual

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SECTION 3 - INSTALLATION Page S3-33
ENHANCING HEAT TRANSFER (A)
AIR FLOW
PCS1
18-22" Flex Duct
(15-100 ft in length)
Cloth Support
Straps to Peak
A simple method of enhancing heat transfer within the attic is to suspend
from the atticÕs peak a length of large flexible duct. Place the flexible duct adjacent to
the PCS1Õs heat transfer coil 1-2 inches from the fins. This allows ÒdistantÓ air to be
more easily drawn across the heat transfer coil. Centering the flex duct on the coilÕs
surface also allows ÒlocalÓ air flow to be drawn across the coil at the same time.
This method is useful in attics where the PCS1 would have an obstructed air
flow path. It promotes a larger circular air flow pattern thereby enhancing attic heat
transfer. It is also useful in attics with cathedral like ceilings that use scissor joists.
These ceilings have a two (2) foot attic air space above the cathedral like ceiling.
Large flex duct is available at building supply centers. Standard cloth support
straps are available for suspending the large flexible duct from the atticÕs peak. Both
the large flex duct and support strap are relatively inexpensive.