A DOAS HVAC system is an acronym for “Dedicated Outdoor Air System” and is a type of advanced technology used to heat, cool, and ventilate a building. It provides fresh air to the indoor environment while keeping energy bills low. This is achieved by separating the hot and cold air streams so that they can be efficiently filtered and re-circulated. The DOAS system also reduces contaminants because it uses filters to trap pollutants and filter particles. Overall, the DOAS HVAC system is an efficient and economical way to reduce energy costs and provide clean airflow in any building or office.