Rooftop HVAC equipment: this article describes rooftop mounted HVAC systems - rooftop air conditioners, rooftop heat pumps, and rooftop heating equipment. We describe types of roof-mounted HVAC equipment and common inspection points, operating problems, and repair approaches. At page top is a roof mounted swamp cooler or evaporative cooling system on a private home in Tucson. Rooftop mounted central air conditioning systems may include both the cooling unit (evaporator coil, blower fan, filters) and the compressor/condenser unit in one package. At above right is a complex of roof-mounted AC/heat pump systems on a Christchurch, New Zealand high rise building roof. These units may be a bit crowded as well as blown-on by the building's ventilation system openings at the upper right of the image. At above left is a flat-roof mounted commercial cooling system located in New York. Rooftop mounted central cooling systems may be smaller packaged systems which blow their cool air down directly into the cooled space through an opening in the roof, drawing return air from a nearby location, or

the rooftop cooling system may be connected to duct work which in turn blows down into multiple building areas to deliver cool air,how does split ac unit work drawing return air from one or more centralized returns.cheap split system air conditioner prices In many commercial installations, the entire area over a suspended ceiling maycarrier rv ac unit serve as one giant return plenum through which pass the supply ducts, delivering air to individual supply registers. While the list above describes the common components of a typical residential air conditioning system, other configurations and packaged units are also in increased use in both residential and commercial installations. Alternative HVAC designs may combine all components except for the duct work in a rooftop mounted unit such as

the one shown above where it was mounted on a flat roof over offices at a commercial building. The outdoor compressor/condenser unit of split-system air conditioners and heat pumps is also commonly mounted on rooftops, especially flat or low-slope roofs such as the unit shown at left. Installation requirements for rooftop-mounted split system compressors / condenser units include both a service disconnect (circled in our photo) and often additional measures to assure that the unit is properly padded to avoid damage to the roof membrane, and to assure that the unit is properly levelled. IN our OPINION, where rooftop mounted split system condenser units are exposed to high temperatures system operating efficiency and costs may be affeted. Details are at SPLIT SYSTEM AIR CONDITIONERS & HEAT PUMPS These photographs show what happens when a rooftop packaged-terminal air-conditioning air handler (PTAC) and horizontal runs of air-ducts are installed on a roof surface and when that air duct system is improperly sealed and

also is lined with fiberglass insulation. Water ponded on the old, concave sections of air conditioning ducts on the roof of this commercial office space. As water leaked into the duct system it saturated fiberglass duct liner which in turn, had its normal coating of organic dust and debris from the building, risking an indoor mold or pathogen problem for some of the occupants. The cure for these duct leaks was costly: it was determined that it was less costly to completely replace the rooftop ducts with new metal ducts using outside insulation than it would have been to remove the contaminated fiberglass liner, clean the existing ducts, repair the leaks, and insulate theirThe work was combined with other building HVAC cleaning and repairs. Common inspection points & functional issues around rootop-mounted HVAC equipment include: Shown at left, support system for rooftop air conditioners / heat pumps mounted on a metal roof in Christchurch, New Zealand.

Continue reading at SPLIT SYSTEM Ductless Air Conditioners or select a topic from the More Reading links or topic ARTICLE INDEX shown below.We make equipment screens, solar racks and other cool products for commercial rooftops (Well at least we think our products are cool.) We'll help you with your project Let's get you to the right place fast... Learn how we work with you including free engineering and design services. Yep, we said free. Learn how we support you including installation help, pricing and submittals. Visit our online store to buy parts for equipment screens and other products for commercial roof tops. VisionGuard™ Curved Louvers offer an updated twist to the standard louver. These louvers will provide the aesthetic of a slatted wall with an added decorative curve to each blade. Spacing between blades can be adjusted to any distance desired to allow more, or less view through the blades. The continous blades without vertical mullions or frame flanges provide a very streamlined visual effect.

Click here to learn more. Try Prime free for 30 days. See other buying options from other sellers. 51 used & new from exclusively for Prime members. Buy "Camco 25071 14" x 14" Universal Roof Air Condition...” from Amazon Warehouse Deals and save 53% off the $14.84 list price. 19.5 x 17.1 x 1.4 inches #2,112 in Automotive (See top 100) product worked great very satisfied Fit well and a nice thickness, easy installation. You will need silicon to hold gasket on a.c. while you install It worked very well and stopped leaking on the A/C on the roof. Can't beat the price! Works great but didn't need it so returned it.The usual control method to prevent birds from nesting under the units has been to attach hardware cloth around the system. This works until the AC maintenance person comes out to service the unit and has to detach the control method and doesn't re-attach it. Then the bird problem starts over again. At Flock Free we developed the AC Riser system because traditional bird control processes physically attach control devices directly to the AC unit making maintenance difficult.

We spoke with AC professionals who expressed a desire for a system which allows them to service the units and keep damaging birds out. The riser system isn't difficult to install and can be assembled in less than an hour. The center post is adjustable in height and the magnets on the base hold it in place. The plastic balls at the end of each extension pole make the netting easily centered. The chain at the bottom can be wired to the netting or Net-Ringed into place if you have a Net Ring tool. The top of the riser post is pre-drilled to attach the spinning flock reflector so a visual deterrent can be seen by the birds from great distances.When it comes time for maintenance to the AC unit, the service person just rests the chain and netting to the side they are working on to access the top of the unit. When they are finished, they place the chain back onto the roof top.For a business to replace a roof top Air conditioner system can easily run in excess of $10,000 making this system a great value for property managers and apartment groups to have their on site staffs to assemble.