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At least in commercial buildings in humid climates, building air is cooled by industrial chillers to lower humidty to acceptable levels (chiefly to inhibit mold growth I think), then the air is heated for comfort. So it would actually use more energy to make these spaces warmer. This is what I have been told by some building engineers/architects.



A chiller generates a lot of heat which is discharged outside (for example on the building roof). I would ask the engineer why they don't use this heat to reheat the dehumidified air.




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