A warm-air heating, ventilating and air-conditioning contractor fabricates, installs, maintains, services and repairs warm-air heating systems and water heating heat pumps, complete with warm-air appliances; ventilating systems complete with blowers and plenum chambers; air-conditioning systems complete with air-conditioning unit; and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with any of these systems. This classification shall include warm-air heating, ventilating and air-conditioning systems which utilize solar energy.
The state capitol is also the largest city in the state. Because of its riverside location, Columbus has long been a center of trade and industry. Today's Columbus has diversified out of the heavy manufacturing that has long been its staple and now includes high tech, energy, design and retail sectors. Like most Ohio cities, Columbus keeps local regulation relatively light and instead has the state take the lead on business regulation.