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Index
FAQs
Reference
Fundamentals
Ground Water
(Open-Loop)
Systems
Environment
Equipment
Ground-Coupled
(Closed-Loop)
Systems
Special Considerations
Installations
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Blind-Alley Ducts
Occasionally found in duct systems that use joist spaces or other parts of
the building structure to channel air flow, blind-alley ducts occur as a result
of mistakes made during installation. A blind-alley duct leads nowhere, except
possibly to the outside, while the register it was supposed to serve has no
source of heat. The room containing the register is therefore cold. If a room always seems
too cold or a register doesn't seem to have any air flowing out of it, it may
be worth investigating.
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