Specifications

14
Figure 14 – Perimeter Below Grade Duct Layout
General Recommendations:
 Galvanized sheet metal ducts are
acceptable in most installations. A
below-grade duct system should use
PVC or plastic-coated galvanized spiral
pipe to avoid deterioration.
 Ductwork that passes through an
unconditioned area should be insulated
on the exterior.
 When applicable, locate exhaust fan
air intakes as close to the whirlpool as
possible.
 To prevent excessive vibration noise,
install neoprene flex connectors when
attaching ductwork to the
dehumidifier.
 Skylights require significant airflow to
avoid condensation on their surfaces.
2.6.2 Evaporation and Latent Loads
Every building’s moisture (latent) load is
calculated in the same way. There are
generally three sources of moisture that are
considered:
 Internal load; evaporation rate
 Occupants
 Outdoor air load
It is important to be aware of the design criteria
used to calculate the total load and reconcile a
unit selection. Seresco’s Natatorium Design
Manual has more information on this subject.
2.6.3 Required Access Space
Access Space
No Access = no service or maintenance.
All NE series dehumidifiers have been
designed to require only two sides access.
Allow a minimum of 36 inches of clearance
on the sides indicated in Figure 15 for piping
and service access. Mirror access units are
also available.
Figure 15 – Recommended Access Space