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Natatorium IAQ is very important since disinfectant products from the pool water surface actually off gas forming Trichloramines which are hazardous to bathers and pool staff within the pool enclosure.
Design requirements called for 25,500 SCFM (12,036 L/sec) of supply air to the Natatorium and the pool enclosure to be held at 82[degrees]F (29.4[degrees]C) Dry Bulb (DB) and 70.1[degrees]F (21.2[degrees]C) Wet Bulb (WB) with a 60% room RH and a pool water temperature of 82[degrees]F (27.7[degrees]C).
On this day, Shang himself has a wet towel and swim trunks hanging from a wall hook in his office, dripping dry from this morning's swim at CSA's competitive natatorium next door.
It's a fitting name for a natatorium that will ultimately look like a giant box of air bubbles.
* Regarding "Designing IAQ in Natatoriums," I have several comments and questions that I hope the author will address.
Assume a typical natatorium (volume = 14,000 [m.sup.3], water surface area = 1143 [m.sup.2]) having a diffused/diluted trichloramine concentration of 1 mg/[m.sup.3].
"We do a lot of jobs that are tied into bigger projects like renovations on a school facility, natatorium or a municipal playground."
Note that the same conditions which create an environment aggressive to stainless steel also increase the risk of deterioration of other materials commonly used in natatoriums, including painted galvanized steel, brass, aluminum, nylon, masonry and timber.
Highly stressed stainless steel components with grades such as 201/201L, 304/304L, 316/316L and 321 can become susceptible to fracture in natatoriums when there is excessive accumulation of chlorine-containing compounds on the surface of the alloy.
In the ASHRAE Handbook--HVAC applications, Chapter 5.6, Natatoriums, a constant is used in the formula to calculate the rate of evaporation.
"When you walk into a natatorium and smell `that smell,' what you are actually smelling is chloramines, which are caused by the incomplete oxidation of organic material (urine, perspiration, suntan oil, shampoo, etc.)," Osinski says.
A natatorium suffering from inadequate ventilation, water circulation, sanitation and filtration can create airborne chloramines, which can contribute to airway irritation, eye irritation, and wheezing among people at the facility (Shaw 1986).
"Natatoriums: the inside story." ASHRAE Journal 48(4):16-27.
One example of an airtight and thermally sealed envelope system was used for the Kappen Aquatic Center, the first-ever LEED Platinum natatorium, which was designed using insulated concrete forms.
In the case of indoor natatorium swimming pools and ice rink enclosures, there is another reason to specify wood roof structures - they resist corrosion from moisture or chemicals in enclosed spaces.
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