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Additional info for 1999 ASHRAE Handbook Preface
The pool enclosure must be suitable for year round operation at 50 to 60% relative humidity. A vapor barrier analysis (as in Figure 11 in Chapter 22 of the 1997 ASHRAE Handbook—Fundamentals) should be prepared. 7 Failure to install an effective vapor retarder will result in condensation forming in the structure and potentially serious damage. Pool Water Chemistry Failure to maintain proper chemistry in the pool water causes serious air quality problems and deterioration of mechanical and building systems.
Economical operation may be possible, depending on the building characteristics, lighting load, and occupant load. If well or other water is available, it may produce a more economical installation than an air-source heat pump. ATRIUMS Atriums have diverse functions and occupancies. An atrium may (1) connect buildings; (2) serve as an architectural feature, leisure space, greenhouse, and/or smoke reservoir; and (3) afford energy and lighting conservation. The temperature, humidity, and hours of usage of an atrium are directly related to those of the adjacent buildings.
Installations near a seacoast should be specially constructed (usually with stainless steel or special coatings) to avoid the accelerated corrosion to aluminum and steel components caused by salt. In high-rise buildings of more than 12 stories, special care is required, both in the design and construction of outside partitions and in the installation of air conditioners, to avoid operating problems associated with leakage (caused by stack effect) around and through the machines. Frequently, the least expensive installation is finned or baseboard radiation for heating and window-type room air conditioners for cooling.
1999 ASHRAE Handbook Preface