How Much Does a Natatorium Cost to Engineer?
Engineering for a natatorium (indoor pool facility) typically costs $150,000 to $600,000+, depending on pool scale, spectator capacity, and competition features. Natatoriums are the most demanding humidity-control buildings: the pool evaporates hundreds of gallons daily into the air, the chloramine-laden moisture corrodes unprotected structure, and the acoustic environment (echoing caverns) needs treatment. Expect engineering at 10-14% of construction.
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Dehumidification: the signature system
The MEP engineer designs the dedicated dehumidification from the evaporation load (pool surface area, water temperature, air temperature, activity level — competition pools with splashing evaporate far more than lap pools): supply air washing the glass and walls (condensation control — the building's durability depends on it), heat recovery (exhaust energy preheating the pool water and supply air), and the corrosion specification (every metal component rated for the chloramine environment — standard galvanized ductwork dissolves). The dehumidification protects the building, not just comfort.
Pool structure and water systems
The pool vessel (reinforced concrete — the structural design for the water loads plus the surrounding deck), waterproofing (the pool shell's waterproofing is the zero-tolerance detail), filtration and chemical treatment (sand or regenerative filters, UV/ozone secondary disinfection — the water-quality engineering), and the gutter/recirculation systems (competition gutters, deck-level vs. rim-flow). The pool consultant's hydraulics integrate with the structural and MEP.
Acoustics and spectator
Natatoriums are acoustic nightmares (hard surfaces, large volumes — the acoustic treatment tames the reverberation for announcements and comfort), spectator seating (bleachers — the structural and egress design), and lighting (competition light levels, glare control over the water). The building sections separate the humid pool hall from the dry support spaces (the vapor barrier between them is the durability line). Plan 12-24 months for design.
The bottom line
Budget $150,000-$600,000+ for natatorium engineering — evaporation-driven dehumidification with heat recovery, corrosion-proof construction, and acoustic treatment.
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