Air Delivery

NOTE: ENVIRONMENTAL POOL SYSTEMS WILL EXCEED ASHRAE REQUIREMENTS FOR AIR DELIVERY RATES.

Our experience shows that minimum air turnovers may not maintain appropriate conditions of temperature and humidity.

ASHRAE 1999 HVAC APPLICATIONS MANUAL States:

"Total airflow should be determined by a psychometric analysis. Most codes require a minimum of six (6) air changes per hour, EXCEPT where MECHANICAL COOLING is used. This rate MAY PROVE INADEQUATE for some anticipated conditions of occupancy and use."

Where mechanical cooling is provided, air delivery rates should be established to maintain appropriate conditions of temperature and humidity. The following rates are typically desired:

(NOTE: These are ASHRAE's recommendations, NOT EPS)

Pools with no spectator areas: 4-6 air changes per hour.

Pools with Spectator areas: 6-8 air changes per hour.

Therapeutic pools: 4-6 air changes per hour.

On new construction, EPS will size the duct system for minimum of 8 air turnovers, and may size for additional air turnovers upon review of building design and operating conditions. The proper duct design, sizing, and installation is necessary for proper equipment performance. Poorly installed air delivery systems (undersized, oversized, choked down, square throats, etc.) significantly reduce the performance of the dehumidifier and the air delivery system.