Specifications

13
2.6. System Design Checklist. Ensuring
that all critical system design aspects have been
addressed is paramount to obtaining a safe and
healthy pool environment. Seresco’s name is a
useful checklist.

System duct design and air
pattern
 Evaporation rate and latent
loads
 Required Access Space
 Exhaust Air
 Supply Air flow
 Cooling and Heating loads
 Outdoor Air
2.6.1 System Duct Design and Air
Pattern
The overall duct design will determine whether or
not the space will be comfortable and
condensation free. Special care must be taken to
ensure the entire room sees the required air
changes per hour and that all
exterior windows have air delivered to them.
Stagnant areas, especially where occupants can
access (the deck area for example) will suffer
from poor air quality and lead to complaints.
Traditional problems in indoor pools are easily
predictable and can be avoided by following to
models provided here. Figures 13 & 14 illustrate
good air distribution practices and layouts.
All air distribution systems should:
 Supply 4-6 volumetric air changes per hour.
 Blanket exterior windows, exterior surfaces
prone and other areas prone to
condensation with supply air. A good rule of
thumb is 3 - 5 CFM per ft² of exterior glass.
 Locate the return grille to enhance the
overall air pattern within the room.
 Prevent air short-circuiting. Avoid installing
the return air grille too close to a supply
grille.
 Select grilles, registers and diffusers that
deliver the required throw distance, and the
specified CFM rating.
 Introduced outdoor air per local codes and/or
ASHRAE Standards
 Maintain a negative pressure in the space
with an exhaust fan.
Figure 13 – Perimeter Duct Layout