There is much more to HVAC in a commercial building than in a home. The mechanical equipment needed in a commercial building is more sophisticated and powerful.
In a small commercial building (no larger than the average home), then a commercial heating solution of a conventional furnace is appropriate because there are few rooms to heat. However, if the building is substantially larger than the average home, then it will need a unique commercial HVAC system to ensure air is in proper circulation and the inhabitants are comfortable.
You can tell if your HVAC system is flawed if you find hotspots and coldspots depending on where you are in the building. A proper modern HVAC system will provide clean and comfortable air, consistent in temperature, to all areas of a commercial building.
Zoning systems are also a critical component of a commercial HVAC system. Common areas will have to be a specific temperature that everyone finds comfortable, but some individuals may want their office at a different temperature. Also, rooms with many computers (including server rooms or data centers) need to stay cool to function optimally. The need for temperature zoning systems creates the need for an advanced and capable HVAC system. These are some reasons why Commercial HVAC Services vastly differ from Residential HVAC Services.