Specifications

9
HUMIDITY CONTROL TECHNOLOGY
The purpose of this outdoor air is to help dilute
chemicals off-gassed from water. A predictably dry
portion of the deck will not factor into the IAQ issues.
Additionally, outdoor air requires considerable heating in
the winter.
More is not better. Exceeding code requirements is not
recommended. In winter it will significantly increase the
operating expenses and in summer may increase the
dehumidification load.
Load Estimation Software
Seresco has developed software that calculates all
moisture loads in a matter of minutes. On the previous
page, Figure 2 gives a snapshot of the basic data that
would generally need to be entered to calculate a load.
Humidity Control Technology
How to Remove Moisture
Engineers typically consider one of three approaches to
ventilate a natatorium. It is important to understand the
capabilities and limitations of each approach in order
to select the best system for the application. Seresco
manufactures all three styles of unit and will help you
evaluate what is right for your application. Energy
consumption, geographic location, budget and desired
control of space conditions are among some of the key
decision making criteria.
• Refrigeration based dehumidifiers
- Seresco’s NE & NP Series
• Chilled water with reheat air handler
- Seresco’s NW Series
• Outdoor air ventilation (usually with heat recovery)
- Seresco’s NV Series
Refrigeration Based Dehumidifiers:
Seresco’s NP Series & NE Series
Refrigeration based dehumidifiers are by far the most
common and popular method of removing moisture
from the space. These are the NP and NE Series type
units built by Seresco. The units are designed and
developed specifically for dehumidifying indoor pools.
They offer year round humidity control at the lowest
overall operating costs.
A major benefit of this approach is year round humidity
control with low operating costs. These systems use
both sides of the refrigeration cycle (evaporator and
compressor waste heat) simultaneously. Contrast this
to traditional air conditioning units that use only the
evaporator and dump condenser heat outdoors. These
units use the evaporator to dehumidify (and cool when
needed) but also put recovered heat energy back into
the pool and/or back into the process air. This approach
is unique to the natatorium industry. The system can
be simultaneously dehumidifying (cooling) the air and
then reheating it (and/or the pool water) to deliver