Find AHRI Certified® Central Station Air-Handling Unit Casings (AHUC) Related Standards: 1350 and 1351 January 2016 AHR Expo Presentation - AHUC The certification program includes: enclosure which houses the fans, coils, filters, and other components of the CSAHU. It is generally made of metal and lined where necessary with material for thermal insulation and/or acoustic attenuation. It is portion of CSAHU that contains the air that is being conditioned, is exposed to the fan pressure, and separates the conditioned air from the surrounding air. The size limitation on the certification program is AHUC no larger than 150 ft2 in exterior surface area. Casing Deflection Rating Class Casing Air Leakage Class Thermal Transmittance Class with Leakage (Optional) Thermal Transmittance Class without Leakage (Optional) Thermal Bridging Class (Optional) Application of Fan Airflow Stations In Air-Handling Units Ik-Seong Joo Ph.D. , Mingsheng Liu Ph.D. and P.E. & Guopeng Liu

ABSTRACT This article demonstrates a case study in which fan airflow stations were applied to the air-handling unit's operation to improve building pressure control and reduce fan energy consumption. The fan airflow station is a new airflow measurement technology that uses fan differential pressures, fan speeds, and fan curves to measure the supply and return airflow rates more accurately than typical airflow stations used in recent air-handling units. The fan airflow stations were used as a volumetric return fan tracking method for building pressure control. The building pressure was maintained adequately positive by controlling the return airflow a little less than the supply airflow. The building pressure control was not affected by wind or any other operational conditions. The fan airflow stations were also used to reset a duct static pressure set point under partial load conditions. The set point could be reset from the calculated supply airflow ratio, which saved substantial fan power consumptions.

This article explains fundamentals of the fan airflow station technology and presents the results of collected trending data. EAS designs each AHU to meet and exceed the customized needs of the exact project application. non window unit air conditionerEAS always uses the highest quality materials for construction. carrier ac units not workingEAS AHUs are all aluminum with a foam core panel and true “No Through Metal.”york ac package units The company’s innovative design approach and experience provides the most efficient systems while maintaining the best serviceability for maintenance. Designed and constructed off site, EAS AHUs can be pre-piped, pre-wired and pre-controlled to save installation time, overall cost and to improve the quality and safety of the completed product.

AHUs are shipped directly to the final destination where the EAS team will quickly install the system in a matter of days instead of weeks by having completed much of the trade work prior to shipment and delivery. EAS sets the benchmark for quality, efficiency, and innovation. 50+ year AHU casing designed to last the life of the building Structural steel and structural aluminum base material Foam core panels with aluminum interior and exterior skin as standard Foam panels are 94% porous free and do not absorb moisture True no thru metal construction utilizing phenolic thermal break Panels are NFPA 90 A & B Compliant Double gasket doors providing 0% leakage @ 10”wg. 3 Point latching hardware with single locking handle on all doors True no thru metal NFPA 90 test port provided on each door Continuous full height Stainless Steel Piano Hinge on each door 12” x 12” wire reinforced windows in each door Patented aluminum extrusions with phenolic thermal break

3/16” Aluminum safety tread floor throughout Continuously welded floor seams creating 2” deep pan throughout entire unit Recessed 8”x 12” floor drains in each access section with welded drain pipe extended to exterior of base All Fasteners are stainless steel Fully welded casing construction eliminates penetrations in the exterior of the unit Fully welded aluminum IAQ drain pans triple sloped to prevent standing water Coil headers piped to exterior of unit casing and provided with flanged connection Cooling coils provided at 450FPM or less as a standard to prevent moisture carryover All stainless steel coil supports provided as a standard Drain pans extended downstream a minimum of ½ coil fin height eliminating condensate carryover 304SS intermediate drain pans with 2” drains individually extended to base drain pan Each fan individually isolated using minimum 2” seismic spring isolators, flexible connections and thrust restraints

Fan stands are fully welded aluminum Fans are mounted in the center of the airstream for most efficient airflow All fans provided with Premium efficient TEFC Motors Monorails provided in each fan section for fan/motor removal 4’ vapor tight fluorescent lights provided in each section Rigid aluminum conduit provided throughout Industrial grade electrical components and fittings Filter frames provided with stiffeners between each rack 1/2% leakage at 1.5 times design static pressure Full time installation supervision provided with every unit Plug and play electrical and controls incorporated into design Factory leakage and deflection testing standard Knockdown / field assembled unit capabilities Fans and air conditioners The unit of controlled mechanical ventilation and that one of air conditioning are the core business of Walter Weger Srl. We offer solutions for all your necessities. Our customizable compartment systems DIWER and DIWER EVO feature such qualities as durability, modular usage, high-quality materials, excellent acoustic insulation, and short delivery times.