Navy Air Handling Units (AHU) Maintain fully supported and fully integrated HVAC systems. DRS’ Navy heating, ventilating, air conditioning air handling units (AHU) are designed to comply with Navy specifications, are first article qualified and, in many cases, are qualified provided listed. Our Navy AHUs are manufactured with proven performance and quality construction, and are fully supported with replacement parts and full integrated logistics support data. Our short manufacturing lead times make our Navy AHUs readily available for both new construction, and overhaul and repair. Navy air handling unit products Self Contained Air Conditioners (SCAC) per MIL-A-19865 Fan Coil Assemblies (FCA) per MIL-A-23798 Fan Coil Units (FCU) per MIL-A-24775 Unit Heaters per MIL-U-17293 Unit Coolers per MIL-C-2939 Sealed insulation system motors Related Products and Services Marine Grade Air Handling Units (AHU) Radio Frequency Mobile Electronics Test Set (METS / RFMETS)

Arc Fault Protection System (ADACS) Joint Platform Tablet (JPT) Electric and Hybrid Electric Ship Propulsion Systems Steam Turbine Design, Assembly and Repair Navy Electronic Motor OperatorMVZ Multi-Position Air Handler Rounds Out Diamond Comfort System™ for Efficient, Whole-Home Cooling, Heatinginstalling split ac units Download a PDF version of this Press Release.outside air conditioning unit blowing cool air Your air handler is an essential part of your "split" heating and cooling system. hvac not cooling very wellIt is the indoor portion that delivers the cooled air in the summer and heated air in the winter — quietly and economically. You'll find a Daikin brand air handler that's a perfect complement to any heat pump system.

No matter which unit you install, the Daikin brand offers what we believe to be some of the best warranties in the heating and cooling industry. Draw-thru centrifugal blower is belt-driven for quiet, efficient operationUpflow and horizontal installationsAHRI certified; Untes attended Iran 7th International Conference on HVAC&R The International Conference on HVAC is one of the premier events in Iran and neighboring countries in the field of HVAC&R industry which is being helIndoor air handler or blower unit for A/C or heat pump or furnace systems: How to inspect & repair the indoor components of air conditioners and heat pumps: the air conditioning system indoor air handler units, blower units, or AHU's, (also called fan coil units) including the air conditioner blower fan, the indoor cooling coil or "evaporator coil", air conditioning system filters, and the causes, cures, and prevention of air handler leaks that lead to rust, damage, and mold contamination in the

Air Conditioning Blower Fan, Cooling Coil, Fan Coil Unit Leaks, Mold, and Filter Problems &: Repairs. Here we provide air handler unit or blower assembly troubleshooting by expanded annotated information from the US EPA [5]who provided suggestions for investigating the air handling unit during an indoor air quality investigation. Outdoor components: For a discussion of the outdoor components of an air conditioning or heat pump system see COMPRESSOR / CONDENSER REPAIR. Also see our complete HVAC cooling and heat pump diagnostic guide beginning at LOST COOLING CAPACITY. We also discuss how to improve indoor air quality by installing a cascaded air filter system at the air conditioning (or heating system) air handler to provide optimal air particle filtration for people with asthma, allergies, or indoor mold or other IAQ concerns. Filters protect the blower assembly: The typical A/C system circulates air through the building duct work using a "squirrel cage" blower fan.

It is very important for you to check and change air filters at least monthly when the system is in use to protect the blower fan from dirt clogging. Cupped fan blades can become blocked by debris: The blades of a squirrel-cage fan are cupped in order to cause the spinning cage to move air. Dirt accumulation on the blades fills-in this cupped area, ultimately changing the "cup" to a simple flat area. The fan will spinI've seen the cubic feet per minute of air conditioning air-flow literally double when a very dirty squirrel cage fan fan of this type was cleaned or replaced. Cleaning an air conditioner squirrel cage fan with compressed air? If the blower fan blades have significant dirt accumulation, you should have the system professionally cleaned. While this is a fairly costly service call (requiring blower disassembly and removal for cleaning) it can make a dramatic improvement in system performance. Do not permit a simple "blow out" of the blower by compressed air if

the air handler/blower are in the living area. Some HVAC service companies use a foaming cleaner for removing debris from anThat same material might assist in cleaning a squirrel cage fan. Otherwise we recommend removing the fan and cleaning it thoroughly outside. Clean the remainder of the fan cabinet and housing before returning the air handler to service. Very dirty, wet, leaked-into, or rodent-infested blower compartments risk indoor air quality and health issues in buildings. The air handler unit in the photo at left needs cleaning and a check for unsafe wiring due to leaks. Leaks into the blower compartment of an HVAC air handler invite mold problems too. The return air plenum in the photo at right has both a dead mouse and some other sort of trash that probably fell down a return air floor grille. Mice in HVAC systems are a potential viral or bacterial hazard as well as an indicator of poor housekeeping. These conditions suggested that there had not been regular inspections of this equipment.

Notice the multiple colors and textures of mold growing on this air conditioner squirrel cage blower fan. Mold, depending on its genera/species, moisture conditions, and growth substrate material, can grow on many different surfaces where some organic material is available for "food". We might find mold growing in an air conditioner on plastic, on air cabinet or duct insulation facing, hidden in fiberglass insulation, or on other materials. Most likely the mold growing on this blower fan found a home in some of the organic constituents of common house dust: skin cells and dust mite fecals. Very often the mold we sample and identify in air conditioner blower cabinets is a very common genera, Cladosporium sp. - a mold so common it's called "the king of molds." Kicking up leaves outdoors exposes you to more Cladosporium sp. than the mold on this But we also find some genera/species of more toxic molds that will grow right on top of other molds that are already present.

So while air cabinet conditions may start by producing one mold of not too much concern, other more highly allergenic or even toxic molds could be present. The fact that the mold in this photograph includes multiple colors and textures of material suggests that more than one genera or species of mold is present. If the total area of moldy material is small (say less than 30 sq.ft. of contiguous mold) we would not bother to take a mold sample back to our lab for identification. Instead we'd suggest that the moldy surfaces be cleaned or non-cleanable material like insulation, replaced, and the cause for its growth corrected. We might, however, sample even a small amount of visible mold as part of a larger building diagnostic program if there were illness or air quality complaints associated with the building. Examples of condensate spill-over inside of an air handler blower compartment, a condition creating a risk of mold growth inside the HVAC system are at BLOWER LEAKS, RUST & MOLD

Information about the potential of toxic mold growth in fiberglass ducts or fiberglass HVAC duct insulation as well as other fiberglass insulation products and more example photographs of that condition are at Mold in Fiberglass in Insulation. BLOWER OPERATION: For effective operation of this system it is essential that it never be operated without air filters in place. See AIR FILTERS for HVAC SYSTEMS. If you permit the filters to become very dirty you may need expensive special cleaning or other repairs. See BLOWER FAN OPERATION & TESTING. COOLING MAINTENANCE TIP: The HVAC blower assembly should be serviced every two years. Without proper service the system may have no more than a five year lifetime. ENERGY CONSERVATION: Keeping the fireplace flue closed (if you have one) when not in use will improve both heating and cooling efficiency in all buildings. or select a topic from the More Reading links or topic ARTICLE INDEX shown below. Questions & answers or comments about how to diagnose & repair problems with the air handler or blower unit / fan assembly in a warm air furnace or air conditioning system .