Daikin heat pumps for light commercial: things to consider when choosing one for a gym

HVAC systems are typically used in light commercial buildings to provide the right level of comfort to both customer and employees occupying those buildings.
 
But what are light commercial buildings?  Huge warehouses, industrial plants or refineries, are certainly not considered light commercial buildings, while retail space, small offices, restaurants, fitness centers or other similarly sized businesses fall into the category.