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Extra info for ASHRAE 2000 HVAC Systems and Equipment Handbook
The design engineer should keep the owner and facility engineer informed, whenever possible, about the HVAC analysis and system selection. Space criteria should satisfy both the architect and the owner or the owner’s representative. Where designers cannot negotiate a space large enough to suit the installation, the judgement of the owners should be called upon. Although few buildings are identical in design and concept, some basic criteria apply to most building and help allocate space that approximates the final requirements.
Components are matched and assembled to achieve specific performance objectives. These limitations make the manufacture of low cost, qualitycontrolled, factory-tested products practical. For a particular kind and capacity of unit, performance characteristics vary among manufacturers. All characteristics should be carefully assessed to ensure that the equipment performs as needed for the application. Several trade associations have developed standards by which manufacturers may test and rate their equipment.
Many local jurisdictions require separation of refrigeration and fuel fired equipment. It is often economical to locate the refrigeration plant at the top of the building, on the roof, or on intermediate floors. These locations closer to the load allow the equipment to operate at a lower pressure. The electrical service and structural costs will be greater, but these may be offset because the energy consumption and the condenser and chilled water piping cost may be less. The boiler plant may also be placed on the roof, which eliminates the need for a chimney through the building.