The mark consists of a stylized, 3-D representation of a metal thermostat used to control indoor air temperature. The thermostat is in two parts, an upper and lower circle representing a dial. There is a gradient of blue on the left side of the lower dial and a gradient of orange on the right side of the lower dial. An orange triangular indicator shows the thermostat dialed to the left in the blue area. On the domed top, the words "Air Control" appear in black. Below the words are two arrows curving into each other. The arrow on the right is blue. The arrow on the left is orange. The words "Mechanical Services, Inc." appear in black at the bottom of the outermost circle. The background color for the circular design is gray.