The HVAC system regulates the quality of the air in a home or office. The ventilation process removes dust, reduces humidity, and heats or cools a room. The air is then moved throughout the home or office through a system of ducts. Modern systems use air flow controls and insulated mini-ducts to move the air in and out of a space.

HVAC is an important part of most structures, including homes, industrial buildings, and even boats. Its main purpose is to control the temperature and humidity in a space and to keep people comfortable. HVAC systems use a mixture of fresh outdoor air and indoor air to regulate the temperature, humidity, and air quality inside an environment.

While many homeowners can perform some routine maintenance on their own, they should seek the services of a licensed contractor for more complex issues. Some HVAC equipment is complicated and requires years of training to operate. Professionals should have state, local, and national certifications to perform repairs and installations.