What is the price to install ductwork for an indoor swimming pool dehumidification system in Toronto?

Installing ductwork for an indoor pool dehumidification system in the GTA typically costs $8,000-$25,000, depending on the pool size, dehumidifier capacity, ductwork complexity, and whether the system includes heating recovery. This is specialized commercial-grade HVAC work that requires careful design to handle the extreme moisture loads and corrosive environment of indoor pools.

Indoor pool dehumidification systems are fundamentally different from residential HVAC ductwork because they must handle massive moisture removal (typically 50-150 pints per day), resist corrosion from chlorinated air, and often integrate heat recovery to warm the pool water with waste heat from the dehumidification process. The ductwork must be sized to move large volumes of air — typically 4-6 air changes per hour for the entire pool room — while maintaining proper air distribution to prevent condensation on windows, walls, and ceilings.

Ductwork materials for pool environments require special consideration. Standard galvanized steel ductwork will corrode rapidly in chlorinated environments. Most pool dehumidification systems use aluminum ductwork, PVC-coated steel, or specialized corrosion-resistant materials. The ductwork must also be insulated with closed-cell foam insulation rather than standard fibreglass, as fibreglass absorbs moisture and becomes a breeding ground for mould in high-humidity environments. Supply ducts typically need R-10 to R-12 insulation to prevent condensation, significantly higher than the R-8 minimum for standard residential applications.

System sizing and design complexity drive costs significantly. A small residential pool (400-600 square feet) might need a 70-90 pint dehumidifier with relatively simple ductwork — supply ducts directing dry air across the pool surface and return ducts pulling humid air from the room. Larger pools or those in finished basement spaces require more sophisticated systems with multiple supply and return points, heat recovery units, and integration with existing HVAC systems. The ductwork must be designed using specialized pool dehumidification calculations, not standard Manual D residential methods.

GTA climate considerations add complexity and cost. Toronto's extreme temperature swings mean the system must handle winter conditions where outdoor air at -20°C is introduced for fresh air exchange, requiring pre-heating to prevent shocking the pool environment. Summer conditions with high outdoor humidity mean the system works harder and may need larger capacity. Pool rooms with large windows facing south or west experience significant solar heat gain, requiring additional cooling capacity and more complex ductwork distribution.

Installation challenges in existing homes increase costs substantially. Most indoor pools in the GTA are basement installations or pool house additions. Running large-diameter ductwork (often 10-16 inch round ducts) through existing homes requires careful planning around structural elements, utilities, and finished spaces. Accessing the pool room for ductwork installation often requires removing drywall, working around low ceiling heights, and coordinating with pool equipment, electrical, and plumbing systems.

Typical cost breakdown for GTA pool dehumidification ductwork:

• Basic system (small pool, simple layout): $8,000-$12,000 including aluminum ductwork, insulation, registers, and installation


• Standard system (medium pool with heat recovery): $12,000-$18,000 including more complex distribution, multiple zones, and corrosion-resistant materials


• Complex system (large pool, existing home retrofit): $18,000-$25,000+ including extensive ductwork modifications, structural considerations, and integration challenges

This work requires specialized contractors experienced with pool dehumidification systems, not general ductwork contractors. The system must comply with Ontario Building Code requirements for mechanical ventilation, electrical work requires an ESA-Licensed Electrical Contractor, and any gas connections for heating components need a TSSA-registered contractor. Most installations also require building permits due to the mechanical system complexity and electrical loads.

Key factors affecting your project cost include pool room size and ceiling height, distance from the dehumidifier to the pool area, number of supply and return points needed, whether heat recovery is included, accessibility for ductwork installation, and integration with existing HVAC systems. Always get multiple quotes from contractors experienced with indoor pool environments — this is not typical residential ductwork.

Need help finding a contractor experienced with pool dehumidification systems? Toronto Ductwork can match you with specialists through the Toronto Construction Network who understand the unique requirements of indoor pool environments.