- Economical Compliance With ASHRAE Standard 62
- To achieve acceptable indoor air quality, ASHRAE Standard 62 recommends a three-to-four-fold increase in the amount of outdoor air provided to most facilities. In addition, ASHRAE recommends that this increased outdoor air quantity be introduced continuously while spaces are occupied. By recovering up to 80 percent of the total energy normally exhausted from facilities, FV-TS preconditioning allows conventional HVAC systems to effectively handle this increase in outdoor air load without increasing the size of the heating/cooling capacity while decreasing energy consumption.
- Reduced Equipment First Cost
- Without the addition of effective energy recovery, the capacity of HVAC systems must be increased significantly to handle the greater outdoor air loads associated with higher ventilation rates. Increasing equipment size often requires the addition of reheat and sophisticated control sequences to control humidity as well as temperature. The FV-TS preconditioner often reduces project first cost by allowing smaller HVAC units and duct systems to be used without the need for reheat or complex controls.
- Improved Cooling Season Humidity Control
- A thermostat governs operation of conventional HVAC systems, i.e., in response only to the conditioned space temperature. When the cooling coil is cycled off, the outside air fan is typically shut-off as well. Thus, no ventilation is provided to the conditioned space until the thermostat calls for cooling. If the outside air fan is allowed to run while the cooling coil is off, then warm, humid air is directed to the space. In both of these cases, indoor space humidity levels will increase above guideline levels, i.e., 60 percent relative humidity.
- Since the FV-TS Preconditioner dehumidifies and cools the incoming outdoor air, the supply air conditions are close to the return air conditions. This effectively produces a buffer against high outdoor latent loads resulting in acceptable indoor humidity levels.
- Helps Reduce Humidification Requirements During the Heating Season
- Supplying 15 to 20 cfm/person of cold, dry outdoor air to a facility during the heating season can result in unacceptably low indoor relative humidity. The HVAC system effectively maintains space temperature by heating the air, yet few facilities are humidified. It is now well documented that many wintertime illnesses come as a result of the body's inability to fight off infection due to "dry airways." The FV-TS unit captures the moisture generated within the space to provide free humidification during the heating season therefore maintaining a healthier indoor environment.
- Improves the IAQ of Existing Facilities
- The compact yet versatile design of the FV-TS unit allows for easy installation in existing facilities and eliminates additional ductwork and disruption of the occupied space below. It can either be used as a stand-alone unit serving multiple HVAC units or as a dedicated preconditioner ducted directly to a single unitary HVAC system.
- Improves the Comfort of Occupied Spaces
- As the outdoor air is supplied to the space, the heating/cooling source is cycled on and off to maintain temperature. When it is cycled off, very cold or very warm/humid air can be "dumped" on the occupants, causing wide temperature fluctuations that makes for a very uncomfortable environment. FV-TS preconditioning solves this problem by providing moderated supply air conditions, even as the heating/cooling source is cycled on and off.
|
 |
|
|
 |
Product Library | Select a category
|
|
Coral Reef Yacht Club (66 kB) 
Description: Ventilation unit recovers energy while resolving smoking issues.
Report Card on Humidity Control (2271 kB)
Description: Failing Grade for Many Schools.
SEMCO Pioneers Indoor Environmentalism (116 kB)
Wizard's Sports Cafe (55 kB)
Description: Sports Bar/Restaurant Clears the Air.
|
|
|
Trane, Voyager, Precedent, and Modular Climate Changer are registered trademarks of American Standard Incorporated.
|
Questions and Comments?