Heating, Ventilation and Air Conditioning (HVAC): We create healthy indoor environments that are energy efficient and cost effective. Commercial buildings need to be heated and cooled for the comfort and productivity of the occupants. Buildings need to be ventilated because humans breathe in oxygen and exhale carbon dioxide. When not enough oxygenated outside air is introduced into the building carbon dioxide levels increase and make people sleepy and unhealthy. Other “pollutants” must also be regularly flushed from the building in order to have good indoor air quality. Buildings must offer a healthy indoor environment. This is achieved by meeting code requirements. It is also achieved by designing for correct quantities of outside air to be brought into the occupied buildings. There are many system types with costs and comfort impacts that can all meet the HVAC needs of a building. G&M helps by engineering the right system to meet the architect/owner’s requirements.